98,245 research outputs found
Eocyzicus parooensis Richter & Timms 2005, n.sp.
No full textEocyzicus parooensis n.sp. Figs. 1–3 Eocyzicus sp. a, Timms & Richter, 2002. Limnadia sp. b, Timms, 1993. Type material. HOLOTYPE 3, formalin-fixed AM P68156, carapace 7.8 × 4.5 mm. PARATYPES formalin-fixed: 13 slide AM P68157, 1♀ slide AM P68158; 833, 9♀♀, AM P68159, all collected by B. V. Timms from Gidgee Lake, 17 November 1999. Type locality. Gidgee Lake on Bells Creek, Bloodwood Station, 130 km NW of Bourke, NSW, Australia, 29°33'S 144°52'E. Etymology. This species is named after the Paroo area where it occurs commonly in hyposaline waters. Description. Male carapace 7.2 to 7.8 mm length, 4.2 to 4.5 mm height (n = 10). Female carapace 6.4 to 6.7 mm length, 3.9. to 4.1 mm height, smallest and largest female both ovigerous (n = 10). Carapace in both sexes oval, with 10 to 11 growth lines in males, and 9 to 10 in females. Dorsal margin of carapace with prominent umbo, posterior of umbo straight. Male head region with prominent rectangular (hatchet-like) rostrum in lateral view (Fig. 2A), including bilateral anterior margins, a ventral margin and a posterior margin. Anterior margins together form a V-shape in the dorsal view, continuing into the fornices of both sides (Fig. 2B). Nauplius eye triangular shaped, with sharp end pointing to the compound eye. Central dorsal part of the head defined anteriorly by prominent compound eye chamber and posteriorly by rounded occipital condylus. Compound eye chamber opening via a small pore anteriorly, slightly above anterior margins of rostrum (Fig. 2A, arrowhead). Central head region filled by mid-gut diverticula. Dorsal organ located close to posterior margin of occipital condyle (Fig. 2B, arrowhead). Female head region differing in particular by shape of rostrum which is more triangular because of less distinct posterior margin (Fig. 3A). Antennule extending to about fourth (females) or sixth (males) segment of posterior antennal flagellum, and distinctly lobate with each lobe bearing short sensilla (Fig. 2C). Antenna with peduncle of about eight segments, anterior densely covered with setae (Fig. 3C), and with about 11 to 14 segments on both anterior and posterior flagellum. Each flagellum segment bearing about six short spines on anterior side, and a number of longer natatory setae at the posterior side. Trunk consisting of 22 (in a few cases 23) leg-bearing segments, the last (two) segments not entirely separated from telson (Figs. 2G, 3B). More posterior trunk segments (between 10 and 15) carrying single dorsal spine at posterior end of segment (Fig. 2F). First and second thoracopod of male modified as claspers, not differing general characters from each other. Movable finger smoothly curving to the apical club (i.e. expanded apex). Surface of movable finger adjacent to apical club covered with scales; apical club with stout flat-tipped spines opposite to scales of movable finger (Fig. 2D). Tip of movable finger with about six (specimen studied might be broken in this area) more elongated “hairy” scales, directed away from apical club (Fig. 2E). Two palps originating from palm, the larger (threesegmented) palp behind movable finger, smaller (onesegmented) palp at apical club base. In females, eggs carried by projections of exopod of the ninth and tenth pairs of thoracopods (Fig. 3D). Telson covered dorsally by numerous spines, with caudal furcae originating at its posterior end. Dorsal part of telson formed like a “U”, with connecting part anteriorly and the two parallel margins ending in strong, upwards curved apexes (Fig. 2G,H,K). Margins carrying about 10 to 13 spines each in males and about 15 to 20 in females, excluding the apex (Figs. 2G, 3B). Two telsonal setae originating from a common plate at anterior end, at inner side of “U” (Fig. 2K). Caudal furcae articulated with telson; each carrying many (about 15) long plumose setae on inner margin (Fig. 2G,K). Tips of caudal furcae covered by very small spinules (Fig. 2 I). Eggs round and smooth, not showing any specialized surface structures (Fig. 3D). Remarks. This species has been recorded from several other localities in the Paroo area (Timms & Richter, 2002). Some of the characters differ from those described herein, e.g., the number of growth lines, number of telson spines, and the carapace length and height. Nevertheless, we believe that all these records (referred to in Timms & Richter, 2002 as Eocyzicus sp. a) are of E. parooensis n.sp. Most remarkable from an ecological point of view is that all these records are from hyposaline water bodies (see Timms & Richter, 2002 for more details). There is probably a second undescribed Eocyzicus species common in the Paroo area, which prefers turbid fresh water habitats (referred to Eocyzicus sp. b by Timms & Richter, 2002).Published as part of Richter, Stefan & Timms, Brian V., 2005, A List of the Recent Clam Shrimps (Crustacea: Laevicaudata, Spinicaudata, Cyclestherida) of Australia, Including a Description of a New Species of Eocyzicus, pp. 341-354 in Records of the Australian Museum 57 (3) on page 343, DOI: 10.3853/j.0067-1975.57.2005.1454, http://zenodo.org/record/468562
Joshua Davis: Author of Spare Parts
No full textCitation: K-State First (2016). Joshua Davis: Author of Spare Parts [Flier]. Manhattan, Kansas: K-State First.Flyer advertising Joshua Davis's author talk at Kansas State University
Parartemia purpurea Timms, 2010, sp. nov.
No full textParartemia purpurea sp. nov. (Figs 4,7,11) Parartemia n sp a Timms and Savage, 2004, p 22, 28; Timms 2009. Etymology. This species is named for the distinct purple colouration of mature females, the name being derived from the Latin purpurea meaning purple. Holotype. One male, 44 km NNE of Esperance, unnamed lake on Dempster Rd, (33 o 28 ’ 58 ”S, 122 o 00’ 38 ”E), 8 October 2008; BVT, WAM 45235. Allotype. One female, same collecting data as holotype, WAM 45236. Paratypes. Two males, two females, some collecting data as holotype, WAM 45237; two males, two females, same collecting data as holotype, AM 82976. Other material. 10 males, 10 females, 23.5 km E of Scaddan, unnamed lake on East Lignite Rd, (33 o 19 ’ 28 ”S, 121 o 58 ’ 17 ”E), 2 August 2005, BVT, WAM 45238; 10 females, 38 km N of Esperance, unnamed lake on south side of Speddingup Rd, (33 o 31 ’ 01”S, 121 o 52 ’ 21 ”E), 8 October 2008, BVT, WAM 45239; 10 males, 10 females, all immature, 64.5 km NE of Esperance near Kau Rock, unnamed pond, (33 o 24 ’ 32 ”S, 122 o 20 ’ 00”E), 9 October 2008, BVT, WAM 45240; 10 males, 10 females, 80 km NE of Esperance in Beaumont Nature Reserve, unnamed lake, (33 o 27 ’ 37 ”S, 122 o 36 ’ 43 ”E), 5 September 2004, BVT, WAM 45241. Description. Male. Length 21.5 mm (head plus thorax 7 mm, abdomen 14.5 mm) First antenna (Fig. 11 A) filiform, a little longer than eye plus peduncle. Second antenna. Basal antennomeres (Fig. 11 A) fused at about 75 o to body axis. Ventral margin with paired ventral processes (Fig. 11 A) about 3 times longer than deep, with distoventral corner rounded but not protruding and medioventral corner sharp, almost a right angle. Ventral process margin with well spaced minute spines, also a few such spines on dorsal surface of the processes. Medial margin of ventral processes about 1.2 times longer than lateral margin. Medial space between ventral processes narrow with parallel margins and terminating basally in a short notch. Ventrolaterally just lateral to basodistal margin of the ventral process a raised circular area, the conical mound, with numerous minute spines. Anterior processes (Fig. 11 A) small, blunt triangular, about one quarter depth of ventral processes. Distal antennomere (Fig. 11 A) almost twice as long as basal antennomere, curved medially, cylindrical and tapering to a sharp apex. Labrum lacking a spine. Thoracomeres (Fig 10 B) enveloped laterally in small fused lobes to form a narrow lateral flange along whole length of thorax. Thorax widest at thoracomeres 10 to 11, with lobe on first genital as wide as lobe on T 11 anteriorly, but markedly narrowing posteriorly. No lobe on second genital segment. Eleven pairs of thoracopods, with first two reduced in size and last without an epipodite. Fifth thoracopod typical for the genus. Gonopods (Fig. 11 C) fused basally. Each apical free portion with a short hooked digitiform process inserted ventrolaterally at about three quarters the length of the free portion. No basal spine. A paratype with gonopod everted (Fig. 11 D)— everted part a little longer than free basal portion, consisting of a basal wide cylindrical component and a tubular distal part of two diameters, a middle section narrower than basal tube and an apical, very narrow apical section. Whole expanded section naked except for a two recurved spines on a single base posteriolaterally on the wide cylindrical component. Abdomen long, 2.1 times head plus thorax. Segments increasing in length and but hardy decreasing in diameter sequentially 1 to 6, with sixth 2.2 times the length and but only marginally narrower than first segment. Telson inflated and not clearly demarked from sixth abdominal segment and cercopods about length of fourth abdominal segment and clothed with setae medially and laterally. Female. 11 mm (head plus thorax 6.7 mm, abdomen 4.3 mm). In life, mature females coloured a deep purple, with the brood chambers a lesser intense colour. Head (Fig. 11 E) with first antenna filiform and slightly shorter than length of eye plus peduncle. Second antenna a little longer than twice eye plus peduncle length, somewhat flattened, and narrowing evenly to a sharp apex. Labrum with a prominent recurved spine. Thoracomeres (Fig. 11 F,G) 1 – 6 and 8 normal, thoracomere 7 with a lateral tumidity, thoracomeres 9 and 10 each with a dorsolateral lamella, with a sclerotized and denticulate margin. Dorsolateral lamella of thoracomere 9 asymmetrical, narrow dorsally and widest ventrolaterally and with subsidiary ventrolateral lamella, while lamella of segment 10 more symmetrical and more ventrolateral. Thoracomere 11 somewhat reduced. Eleven pairs of thoracopods, 2 nd and 10 th pairs a little shorter than most, 1 st about half size and 11 th reduced to just a pair of stubs bearing a few spines. First thoracopod (Fig. 7 J) with all normal components, but endopod and particularly exopod reduced, so that both have fewer posterior seate than normal and exopod just protruding beyond endopod. Normal anterior setae, and with basal anterior setae of endite 4 enlarged, longer than adjacent posterior setae. Fifth thoracopod of normal construction for Parartemia and similar to that in males. Tenth thoracopod (Fig. 7 K) with most structures reduced, particularly endites 1 + 2 and 3, endopod and praeepipodite, and with epipodite lacking. Exopodite of normal relative size and projecting well beyond the endopodite. Anterior setae of endites all present, but reduced in size. Eleventh thoracopod (Fig. 7 L) a stub with terminally what appears to be a very reduced endopod with five setae, and medially two protuberances, the distal one with two setae and a basal greater naked protuberance. These protuberances could be endites. Brood pouch (Fig. 11 F,G) lateral lobes oval structures in dorsal view but more quadrahedral laterally, and connected ventrally, with a posteriorly directed gonopore, borne on a tubular projection. Abdomen segments typical for Parartemia, i.e. segments increase in length and decrease in diameter sequentially from segments 1 to 6. Surface denticulate. Variability. Mature males vary in length from 16 to 23 mm. The basal antennomeres are fused at various angles, probably influenced by preservation, of 60–80 o to body axis and while the frontal processes seem always to be small, blunt and triangular, the ventral processes vary so that the distoventral corner may protrude a little and the medial space varies from being almost closed to being open by a distance up to about one third the depth of the ventral processes. The medial margins of the ventral processes may not always be parallel, but occasionally are V-shaped or uneven. However, the angle of near 90 o on the medioventral corner of the ventral processes varies little. The raised spinose area ventrolaterally to the basodistal margin of the ventral processes may be expressed as a conical mound or may be hardly present. The flange on the thoracic margins is generally present, but its widest part may be at thoracomere 10 or occasionally 11, i.e. more posterior than at thoracomere 8–9. Abdomen length varies from 1.25 to 2.33 times head plus thorax length (average of 1.78 in 10 specimens). This length is due in part to the relatively long 6 th segment which on average is 2.1 times length of 1 st segment. The first ratio is greater than for P. longicaudata and the second only a little less than in P. longicaudata, the species supposedly with an extraordinary long abdomen (see earlier). Mature females range in length from 9.6 to 11.2 mm, and while opaque white in preservation, in life are almost always a deep purple. The lateral tumidities on thoracomere 7 while usually prominent, are sometimes deflated and not noticeable. The lateral lamellae of thoracomere 9 and 10 vary in development, but the lamella of thoracomere 9 is always larger than that of thoracomere 10 and more dorsal in position. Differential diagnosis. P. purpurea sp. nov. males are most similar to P. zietziana due to their broadly similar ventral processes and the shape of the medial area between these processes. However P. zietziana has digitiform anterior processes compared to short conical processes in P. purpurea sp. nov. The lateral and medial margins of the ventral processes are of similar length in P. zietziana, but the medial margin is about 1.2 times longer than lateral margin in P. purpurea sp. nov. The ventrolateral area at the basodistal margin of the ventral processes is different in the two species: in P. purpurea sp. nov. it is raised and very spinous, but in P. zietziana it hardly present, if at all. Finally the abdomen is relatively longer in most specimens of P. p u r p u re a sp. nov. (1.78 times) than in P. zietziana (1.30 in 10 specimens). The two species have different distributions separated by the Nullarbor Plain – P. zietziana occurs in central lowland Tasmania, southern Victoria, and southern South Australia to as far west as the eastern Eyre Peninsula, while P.purpurea sp. nov. occurs in the Esperance hinterland area of Western Australia (Timms et al., 2009). Females are distinct from all other species due to the lack of dorsal swellings and horizontal lateral lobes on various thoracic segments, and the presence of lateral swellings on thoracomere 7 and vertical lateral flaps on thoracomere 9 and 10. Furthermore it is unusual in Parartemia females to have a vestige of thoracopod 11 as P. p u r p u re a sp. nov. does; closest species in this character is P. acidiphila with 3 terminal setae, P. laticaudata sp. nov. with two terminal spines and P. longicaudata with a subterminal spine. Distribution and ecology. P. purpurea sp. nov. occurs in alkaline saline lakes in the Esperance hinterland, from about Grass Patch-Scadden eastwards for about 90 km to Beaumont Nature Reserve (Timms et al., 2009)(Fig. 4). It occurs over a salinity range of 20 to 235 g /L and in lakes with pH varying from 6.9 to 10.4 (Timms, 2009 b; Timms et al., 2009). Generally it occurs in late winter- spring as lakes fill with winterspring rains, reproduces in September and October with purple coloured females actively swimming in the shallows and depositing eggs. Occasionally summer rains fill the lakes, in which case P. purpurea sp. nov. responds as it does to a winter filling (Timms, 2009 b). Females are easily predated upon by waders (mainly Stilts, Avocets) as they swim conspicuously in shallow waters, so that sex ratios can become very biased towards males which tend to stay in deeper waters (author, unpublished observations). Presently it is common throughout this area as few lakes are salinised.Published as part of Timms, Brian V, 2010, Six new species of the brine shrimp Parartemia Sayce 1903 (Crustacea: Anostraca: Artemiina) in Western Australia, pp. 1-35 in Zootaxa 2715 on pages 24-27, DOI: 10.5281/zenodo.19970
Parartemia boomeranga Timms, 2010, sp.nov.
No full textParartemia boomeranga sp.nov. (Figs. 4,6,7) Parartemia n sp c Timms & Savage, 2004, p 22, 26, 35. Etymology. The specific name is suggested by the boomerang-shaped thick area (short arms at an angle and thickened mid region) on the medial surface of the ventral processes. These fit snugly against the female 11 th thoracopod semispherical bases in amplexus. Holotype. One male, unnamed lake on Gunyidi - Wubin Road, 15.5 km E of Gunyidi, (30 o 07’ 08”S, 116 o 14 ’ 36 ”E), 14 September 2003, BVT, WAM 45211. Allotype. One female, same collecting data as holotype, WAM 45212. Paratypes. Two males, two females, some collecting data as holotype, WAM 45213; two males, two females, same collecting data as holotype, AM P 82972. Description. Male. Length 22.2 mm (head plus thorax 9.1 mm, abdomen 13.1 mm). First antenna (Fig 6 A) filiform, about 1.5 times length of eye plus peduncle. Second antenna. Basal antennomeres (Fig 6 A) fused at an angle of about 45 o from body axis. Ventral margin with paired ventral processes (Fig 6 A) about 2.5 times longer than deep. Distoventral corner of ventral processes broadly rounded and slightly protruding, ventral margin weakly concave and medial margin curved asymmetrically with maximum protrusion about two thirds distance from ventral margin and inner margin well indented into the ventral process, so that whole medial portion of the ventral process unsupported from the ventral margin of the basal antennomere. However this portion with a boomerang-shaped thickened area. Lateral and ventral margins of ventral process clothed with well spaced small spines. Medial area between ventral processes concave. Anterior processes (Fig 6 A) digitiform, small and length about equal to depth of ventral processes. Distal antennomere (Fig 6 A) about twice length of basal antennomere, generally curved medially and tapering to a sharp apex, but apical portion convexly curved and with a tumidity mesially. Thoracic segments with small lateral lobes, increasing in size posteriorly and reaching a maximum on segment 11. Lateral bulge on first genital segment even greater than 11 th lobe, so that maximum body width in genital segments. Eleven pairs of thoracopods, with first two reduced in size and last without an epipodite. Gonopods (Fig 6 B) fused basally. Each free apical portion with a basal sharp spine and a ventrolateral short digitiform process at about two-thirds the length of the appendage. Abdomen with segments increasing in length and decreasing in diameter sequentially 1 to 6, with sixth 1.75 times length and half the diameter of first segment. Female. Length 15.3 mm (head plus thorax 9 mm, abdomen 6.3 mm). Head (Fig 6 C) with first antenna filiform, a little shorter than eye plus peduncle. Second antenna somewhat longer than length of eye plus peduncle, flattened, with parallel sides and a round symmetrical apex bearing a short narrow and pointed appendix. Distinct naupliar eye midway between bases of first antenna. Labrum with a recurved spine. Thoracic segments (Figs. 6 D,E) 1–7 normal, segment 8 with a trapezoid dorsum and small lateral lobes, segment 9 with a prominent dorsal swelling and larger lateral lobes, segment 10 reduced with a narrow dorsum and apparently no lateral lobes and segment 11 with a less reduced dorsum and large lobes extended posteriolaterally into a triangular extension and ventrally into a rounded swelling. Dorsal surfaces of segments 10 and 11 sclerotized. Most thoracopods as in male. First thoracopod (Fig 7 A) reduced in size but hardly in relative size of component parts. Both basal anterior basal setae of endites 4 and 5 elongated. Tenth thoracopod (Fig 7 B) also reduced in size and in relative size of components. Endites 1 + 2 and 3 small and with few posterior setae, exopodite semi-oval, basal anterior seta of endite 4 long, but other anterior setae of normal relative lengths. No 11 th thoracopod, but distinct base in the form of a semispherical mound. Anterior edge of first genital segment (Figs. 6 D,E) a collar with a lateral protrusion reaching anteriorly over lobe of 11 th thoracic segment. Brood pouch (Figs. 6 D,E) wider than long, so that whole structure approaches three times width: length. Anteriolateral and posteriolateral corners prominent and a shallow groove between them. Lobes joined ventrally into a short tubular structure, directected posteriorly bearing the gonopore. FIGURE 7. Female thoracopods. A, P. boomeranga sp. nov. 1 st thoracopod; B, P. boomeranga sp. nov. 10 th thoracopod; C, P. b i c o r n a sp. nov. 1 st thoracopod, length; D, P. b i c o r n a n. sp 10 th thoracopod; E, P. laticaudata sp. nov. 1 st thoracopod; F, P. laticaudata sp. nov. 10 th thoracopod; G, P. laticaudata sp. nov. 11 th thoracopod; H, P. mouritzi sp. nov. 1 st thoracopod; I, P. mouritzi sp. nov. 10 th thoracopod; J, P. purpurea sp. nov. 1 st thoracopod; K, P. purpurea sp. nov. 10 th thoracopod; L. P. purpurea sp. nov. 11 th thoracopod; M, P. ve ro n ic a e sp. nov. 1 st thoracopod; N, P. veronicae sp. nov., 10 th thoracopod. For further explanation on the thoracopods see legend of Fig. 3. Differential diagnosis. This species is most similar to P. longicaudata, and indeed in an early key (Timms, 2004), males of the two species were inseparable. However, there are a number of minor differences: (a) the ventral processes are proportionally longer in P. boomeranga sp. nov., (b) the medial edge of the ventral processes is much more convex (boomerang shaped) in P. boomeranga sp. nov. than in P. longicaudata, (c) the medial thickened area in the ventral processes in P. longicaudata is almost straight, while in P. boomeranga sp. nov. it is boomerang shaped, (d) the distal antennomere is evenly concavely curved in P. longicaudata, but in P. boomeranga sp. nov. it is unevenly curved because it is thickened midlength and has outwardly curved apices, (e) the sixth abdominal segment is> twice the length of the first in P. longicaudata, but <twice in P. boomeranga sp. nov., (f) the basal spine of the gonopod is curved in P. longicaudata but straight in P. boomeranga sp. nov. and (g) the distal spine is sited about half way along the gonopod in B. longicaudata but two-thirds the distance in P. boomeranga sp. nov. While females of the two species (P. longicaudata, P. boomeranga sp. nov.) share some important characteristics, e.g. the segment 9 large dorsal tumidity and its large lateral lobes, segments 10 and 11 are dorsally sclerotized in both, and there are large ventrolateral tumidities on segment 11 in both. However there are many differences: (a) the first antenna are longer than the eye plus peduncle, and the narrow apical portion of the second antenna is longer than antenna width in P. longicaudata, as opposed to the first antenna being shorter than the eye plus peduncle, and narrow apical portion of second antenna being shorter than its width in P. boomeranga sp. nov., (b) thoracic segment 8 lacks a lateral lobe in P. longicaudata, but has one in P. boomeranga sp. nov., (c) segment 10 is larger than segment 11 in P. longicaudata, but relative size is reversed on P. boomeranga sp. nov., (d) in P. boomeranga sp. nov. segment 11 has large lateral lobes extended posteriorly in triangular projections, and (e) the brood pouch is generally trapezoid in P. longicaudata, but rectangular in P. boomeranga sp. nov. Distribution and ecology. P. boomeranga sp. nov. is known from only a few lakes in a narrow band northeast of Perth from near Gunyidi to Wubin to Kalannie to Cunderin (Timms et al., 2009)(Fig. 4). Most of its known sites are salinised and extant populations have not been located 2006–2008, leading Timms et al. 2009) to suggest this species be listed as Vulnerable under ICUN criteria. Little is known of its ecological requirements, other than a maximum salinity record of 120 g /L (Timms et al. 2009).Published as part of Timms, Brian V, 2010, Six new species of the brine shrimp Parartemia Sayce 1903 (Crustacea: Anostraca: Artemiina) in Western Australia, pp. 1-35 in Zootaxa 2715 on pages 11-14, DOI: 10.5281/zenodo.19970
Steven Johnson Author Talk Poster
No full textK-State Book NetworkA poster advertising an author talk by Steven Johnson at Kansas State University on September 3, 2014. Steven Johnson's book "The Ghost Map" was the 2014-2015 common book
Eulimnadia beverleyae Timms, 2016, sp. nov.
No full textEulimnadia beverleyae sp. nov. (Figs 3 F, 6) Etymology. This species is named for my wife, Beverley Timms who is tolerant of my long absences in the field, laboratory and office. Type locality. New South Wales, Paroo district, Bloodwood Station, 125 km NW of Bourke, an intermittent grassy pool 1.37 km S of the Shearing Shed, 29 o 32 ’ 11.01 ”S, 144 o 51 ’ 15.58 ”E, 21 January 2011, BVT. Type material. Holotype. Male deposited in Australian Museum, length 5.4 mm, height 3.8 mm, registration number AM P 97806. Allotype. Female deposited in Australian Museum, length 6.0 mm, height 4.0 mm, registration number AM P 97807. Paratypes. Two females, 6.0 x 4.2 mm, 6.1 x 4.3 mm, deposited in Australian Museum, registration number AM P 97808. Diagnosis. Egg spherical, surface with about 30 rounded ridges and grooves and no protrusions. Each groove about 25 % of egg diameter. Cercopod with about 11–13 long setae on basal 75 %; about 11–13 telsonic spines and caudal filaments arising from about the 2 nd to 3 rd spine. Clasper with 5 uneven spines at palpomere junction plus a similar set midway on lateral surface of basal palpomere. Description. Egg. (Fig 3 F). Spherical, diameter 158–175 Μm (n = 5), with about 30 (range 25–34) sets of grooves and rounded ridges, each groove about 40 Μm, i.e about 25 % of egg diameter (35–54 ìm, n = 30). No protrusions. Tertiary layer spongiform and surface microporous. Male. Head (Fig 6 C) with ocular tubercle prominent, the compound eye occupying most (ca. 80 %) of it. Rostrum about 1.5 x ocular tubercle, symmetrical, with a rounded apex and with the ocellus dorsocentrally. Fronsrostrum angle ca. 100 o. Dorsal organ posterior to eye by about its height, pedunculate and about 0.75 height of ocular tubercle. First antenna distinctly longer than peduncle of second antennae, and with about ten lobes, each with numerous short sensory setae. Second antenna with a spinose peduncle and each flagella with 8 antennomeres, dorsally with 1–4 short spines and ventrally with 1–5 longer setae. Basal and distal segments with minimal spines, though setae maximal on distal antennomeres. Carapace (Fig 6 A) elongated oval, pellucid and with slight indication of three growth lines. Adductor muscle scar at about 45 o to the horizontal axis. Thoracopods. Eighteen pairs. The first two modified as claspers (Fig 6 F). Claspers with palm trapezoidal, apical club rounded with thick denticles distomedially and spines apicolaterally, movable finger of normal curved structure, often with a 1–4 spaced dorsal spines. Palps of typical structure. Long palp subequal in length to the palm in first clasper and about 1.5 times longer in second clasper. Both two segmented with about 5 unequal spines at their junctions. Each with five spines, again subequal in length, mediolaterally on the basal palpomere. The three medial most spines of each group subequal in length to palpomere width, next spine about 2 x palpomere width, and most lateral spine 2.5 times in first clasper and 3.5 times in second clasper of palpomere width. Other thoracopods of typical structure for Eulimnadia, decreasing is size and complexity posteriorly. Dorsal surface of trunk with 1–2 short spines medially or posteriorly on each of the posterior 12 trunk segments. Telson (Fig 6 E) with about 12–13 pairs of dorsal spines, with a distinct space after the 3 rd spine and a slight progressive increase in size among distal spines. Many spines with a few denticles. Caudal filaments originating from a mound a little higher than the dorsal floor of the telson and between the 2 nd and 3 rd spine. Dorsal floor of telson major declivity immediately posterior to the mound, followed by a slow decline to the base of the cercopod. Cercopods somewhat longer than dorsum of the telson, the basal three-quarters hardly thinning to a small naked spine, then a rapid thinning to an acute apex. About 12–13 long setae (about 2.5 times diameter of cercopod) on basal 75 % of cercopod; these setae two segmented. Distal 25 % with a cirrus of small denticles. Hermaphrodite. Head (Fig 6 D) with ocular tubercle prominent, with compound eye occupying most (ca 80 %) of it. Rostrum a smooth bulge at an angle of about 160 o to the frons and with a small ocellus, less than 25 % the size of eye. Dorsal organ posterior to eye by about its height, pedunculate and asymmetrical and 75 % the height to ocular tubercle. First antennae a little longer than peduncle of the second antennae, with about eight lobes each with many short sensory hairs. Second antennae as in male. Carapace (Fig 6 B) as in male, though dorsum more vaulted. Thoracopods. Eighteen of typical Eulimnadia structure. Trunk dorsum with 3–9 setae terminally, these setae few, short and stout on last few segments, numerous and longer on segments 8–15 and hardly any setae on anterior trunk segments 1–7. Telson (Fig 6 G) as in male, though with 1 or 2 cercopod setae and telsonic spines fewer. The space between the 3 rd and 4 th spine is shorter in hermaphrodites. Variability. As in most Eulimnadia, many meristic structures are variable numerically, with the full variation not known as only 6 specimens examined all from the one site. Other possible sites where the same egg structure was found were not examined due to extreme syntopy (up to four molecular species present (Schwentner et al., 2015)). Even so in the population from the pond on Bloodwood Station telsonic spines varied from 10–14, and cercopod setae from 10–13. Of the only two males in the collection, one had its rostrum truncated (by attempted carnivory?) so variability in male rostra is unknown, but the female rostra were of uniform structure. Similar eggs were found at many other sites in the central Paroo catchment but were not specifically related to adults because of extreme syntopy in most of these (see Schwentner et al., 2015). Comments. This species is distinctive by the lateral spines on the palps of the claspers. Other species such as E. dahli, E.centerania sp. nov., E. pinochionus sp. nov. and E.taroomaensis sp. nov. have 10–15 long cercopod setae, but whereas they have many (> 13) telsonic spines, E. beverleyae sp. nov. has only about 12 telsonic spines with a marked gap between the 3 rd and 4 th and with the caudal filaments arising from between the 2 nd and 3 rd spine. This species shares the dorsal spines on the clasper finger with E. feriensis (Timms, 2015). Among Australian Eulimnadia, the eggs are distinctive with their ca 30 groove/ridge systems and lack of any protrusions. Few males occur in the collections, probably indicating the androdioecious mode of reproduction and the apparent females being putative hermaphrodites (Weeks et al., 2008), but there is no histological proof of this. Eulimandia beverleyae sp. nov. could be any one of four of Schwentner et al ’s (2015) species G,H, K or 0, such was the high syntopy in many Paroo sites. Distribution and ecology. Judging from eggs examined across the eastern inland, E. beverleyae sp. nov. is common in the central Paroo in a variety of habitats (clear grassy pools, Blackbox swamps, creek pools, and even in claypans). Similar eggs have been found at Moonie, via Goondiwindi in inner southwest Queensland.Published as part of Brian V Timms, 2016, A partial revision of the Australian Eulimnadia Packard, 1874 (Branchiopoda: Spinicaudata: Limnadiidae), pp. 351-389 in Zootaxa 4066 (4) on pages 361-363, DOI: 10.11646/zootaxa.4066.4.1, http://zenodo.org/record/26423
Paralimnadia montana Timms, 2016, n. sp.
No full text<i>Paralimnadia montana</i> n. sp. <p>(Figs. 4, 11, 18)</p> <p> <b>Etymology.</b> As this species lives in the highlands of the New England district in northern New South Wales, the specific name of ‘montana’ from the Latin ‘montanus’ meaning mountains is appropriate.</p> <p> <b>Type material</b>. <b>Holotype:</b> AM P99014, male, length 7.0 mm, height 4.5 mm, New South Wales, 19.2 km south of Glen Innes, Glencoe Lagoon, 29°54’31.6”S, 151°43’52.4”E, 6 July 2009, BVT. <b>Allotype:</b> AM P99015, female, length 8.0 mm, height 5.1 mm, collected with the holotype. <b>Paratypes:</b> AM P99016, 5 males 6.3 × 4.1 mm, 6.9 × 4.1 mm, 6.6 × 4.1 mm, 6.6 × 4.1 mm, 6.5 × 4.0 mm, 5 females 8.0 × 5.1 mm, 8.0 × 5.0 mm, 8.0 × 4.9 mm, 8.0 × 4.9 mm, 7.9 × 4.2 mm, 6.9 × 4.7 mm, collected with the holotype.</p> <p> <b>Other material examined</b>. New South Wales, 10 males, 14 females, 19.2 km south of Glen Innes, Glencoe Lagoon, 29°54’ 31.6”S, 151°43’52.4”E, 19 October 2003, BVT, AM P99017; 2 males, 13 females, Barrington Tops, Emu Rock Tarn, 31°59’25.2”S, 151°28’21.8”E, 22 February, 1995, BVT, AM P47132; Cathedral Rock National Park, pool at head of Oaky Creek, 30°26’36”S, 152°16’18”E, 9 March 1982, G. Wilson, L. Albertson and C. Rose, 29 specimens all together in AM P55708, P55709, P55710, P98326; Barrington Tops, Emu Rock Tarn, 31°59’25.2”S, 151°28’21.8”E, 23 April 2004, BVT, 100 specimens, AM P99018.</p> <p> <b>Diagnosis</b>. Egg cylindrical, generally with two bands of ridges and grooves separated by flared lamellae. Male with a broadly triangular rostrum protruding subequally with the ocular tubercle but at 110° to the rostrum. About 12 telsonic spines. Cercopod with about 9 spines almost inerm on its basal half, length less than cercopod basal diameter.</p> <p> <b>Description</b>. <b>Male</b>: <i>Head</i> (Fig. 18 B) with ocular tubercle prominent, compound eye occupying about 50%. Rostrum protruding subequally to ocular tubercle and at right angles from its base, triangular so 110° angle between frons and dorsal surface of rostrum. Ocellus slightly smaller than compound eye and lying at base of rostrum. Dorsal organ posterior to eye by about half its height, pedunculate and asymmetrical and about threequarters height of ocular tubercle.</p> <p> <i>First antennae</i> (Fig. 18 B) about twice length of peduncle of second antennae; with 7 lobes, each with numerous short sensory setae. <i>Second antennae</i> with spinose peduncle and both flagella with 11 antennomeres; dorsally with 0–2 short spines; ventrally with 0–4 longer setae. Distal antennomeres with minimal spines and maximal setae.</p> <p> <i>Carapace</i> (Fig. 18 A) elongated oval, opaque cream coloured with many pigment cells particularly at valve margins. Adductor muscle scar at about 45° to carapace long axis, only visible when animal removed from carapace.</p> <p> <i>Thoracopods</i>. Eighteen pairs of thoracopods. <i>Claspers</i> (Fig. 18 D) with palm trapezoidal with distinct rounded endite III distomedially. Apical club spherical with many stout spines pointing medially.Small palp with many short, thin spines apically. Finger arcuate with blunt apex bearing many rounded pits ventrally. Both long palps of claspers inserted on apical edge of palm with 2 palpomeres each; palpomere junctions inerm but many limp filiform setae flattened palaform terminal area. Long palp of first clasper about 1.3 × length of palm and 1.7 × length in second clasper. Other <i>thoracopods</i> of typical structure for <i>Paralimnadia</i>, decreasing is size and complexity posteriorly. Last 9 segments dorsally with spines, last few with spine medially, next few with 3–5 spines.</p> <p> <i>Telson</i> (Fig. 18 C) spine ridges with about 12 pairs of spines, all spaced and half to threequarters height of first spine. Spines with spinules. Telsonic filaments originating from mound a little higher than floor of telson and positioned near fourth spine. Floor of telson posterior to mound sloping with steep declivity posterior to mound, then with slightly convex surface to base of cercopod. Cercopods almost as long as spinal row of telson, basal 50% hardly narrowing to small spine then tapering to acute apex. About 9 short stout spines, each with occasional setule on basal half and many tiny denticles dorsolaterally on apical half. Ventroposterior corner of telson hardly protruding, rounded, with few short denticles.</p> <p> <b>Female</b>. <i>Head</i> (Fig. 18 F) with ocular tubercle prominent; compound eye occupying about 70%. Rostrum a rounded bulge little less prominent than ocular tubercle and with middle basal part occupied by ocellus, about 60% size of compound eye. Dorsal organ posterior to eye by about its height, pedunculate and asymmetrical and not as high as ocular tubercle</p> <p> <i>First antennae</i> (Fig. 18 F) a little shorter than peduncle of second antennae, with 5 small lobes each with many short sensory setae. Second antennae as in male.</p> <p> <i>Carapace</i> (Fig. 18 E) as in male, though more vaulted dorsally.</p> <p> <i>Thoracopods</i>. Eighteen <i>thoracopods</i> of typical <i>Paralimnadia</i> structure. Trunk dorsum with segments 1–9 naked, segments 10–14 with 3–9 spines medioterminally and segments 15–18 with 1–3 spines medioterminally. Thoracopods 9 and 10 with long flabellum dorsally.</p> <p> <i>Telson</i> (Fig. 18 F) as in male, though with about 19 pairs of posterior row spines, otherwise with cercopod similar.</p> <p> <b>Egg</b>. (Fig. 11 K, L) Cylindrical, about 334 µm diameter (range 310–345 µm, n = 5) generally with two bands of sharp ridges and grooves arranged parallel to each other with edges of bands expanded particularly where adjacent. Sometimes bands incompletely circular and arranged at angle to each other. Bands separated by broad, flared, equatorial lamella. Cylinder rim margins flared about 50% width of equatorial lamella.</p> <p> <b>Variability</b>. While the rostrum of the head in both sexes varies little, the size and placement of the dorsal organ is not always as indicated for the types when specimens examined in other collections. Still the dorsal organ is always shorter than the ocular tubercle and placed no further away than its height. First antenna lobes vary by ± 1, as do the number of antennomeres. The carapace is not always cream coloured, being almost pellucid in the Emu Rock Tarn populations. Claspers vary little between individuals and populations, with the long palps always with two palpomeres and inerm. However telsonic spines vary in number (± 2) and shape, with females always with more. The unusual spines, instead of setae, on the basal half of the cercopod varied a little in length and numbers (±2) but are always shorter than the basal cercopod diameter.</p> <p> The Oaky Creek material (AM P55708–55710, P98326) varies significantly from the Glencoe Lagoon material (AM P99014–99017) mainly in the number of telsonic and cercopod spines. Telsonic spines number about 20 in both males and females (ca. 12 and 19) and there are about 15 cercopod spines, instead of about 9. It is included in <i>P. montana</i> because of its similar egg and the spines instead of setae on the cercopod.</p> <p> <b>Differential diagnosis</b>. As in other <i>Paralimnadia,</i> the egg is unique with its two rings of ridges and grooves demarcated by frilly collars. The spines instead of setae on the cercopod are also unique, though there is a species in the <i>P. urukhai</i> complex similarly endowed, though in that population the spines are very short (Timms & Schwentner, unpublished data). <i>Paralimnadia montana</i> <b>n. sp.</b> is the only <i>Paralimnadia</i> to have both clasper long palps with only two palpomeres.</p> <p> <b>Distribution and ecology</b>. This species is known from only three sites in New England, New South Wales (Fig. 4), but was probably far more common before European settlement after which many sites with temporary waters were drained or converted to permanent waters (Haworth 1994), particularly on the basalts of the Guyra district. For instance, I remember the occasional presence of a ‘ <i>Limnadia</i> ’ in Billy Bung Lagoon near Llangothlin in the 1960s, but in repeated attempts since 2001 have not found any clam shrimps there.</p> <p> Like many other clam shrimps, the presence of <i>P. montana</i> <b>n. sp.</b> in a site is erratic. I have visited Glencoe Lagoon one to three times every year 1995–2015 and found it only three times.</p>Published as part of <i>Timms, Brian V., 2016, A review of the Australian endemic clam shrimp, Paralimnadia Sars 1896 (Crustacea: Branchiopoda: Spinicaudata), pp. 451-508 in Zootaxa 4161 (4)</i> on pages 485-487, DOI: 10.11646/zootaxa.4161.4.1, <a href="http://zenodo.org/record/266447">http://zenodo.org/record/266447</a>
Lynceus magdaleanae TIMMS, 2013, sp. nov.
No full textL. magdaleanae sp. nov. (Figs. 3E, 4E, 12) Etymology. This species is named for Magdaleana Davis (nee Zofkova) to honour molecular her work in identifying the presence of at least three species of Lynceus in Western Australia. Type locality. Australia, Western Australia, 18 km NE of Goomalling, East Oak Park pit gnamma, 31 o 08’ 20”S, 116 o 52’ 49”E, 19 October 2011, collector BVT. Holotype. Male deposited in the Western Australian Museum (Perth). Length 5.5 mm. Registration number WAM 51624. Allotype. Female deposited in the Western Australian Museum (Perth). Length 5.0 mm. Registration number, WAM 51625. Paratypes. 8 altogether; 2 males and 2 females deposited in Australian Museum (Sydney) Registration number, AM P89077, and 2 males and two females deposited in Western Australian Museum (Perth), WAM 51626. Other Material. Northern Territory: Papunya, 4 km E, gnamma on Warumpi Hill, 23 o 15’S, 131 o 54’E), 14 May 1998, IAEB, AM P90069; Macdonnell Ranges, Palm Creek in PalmValley, 24 o 03’ 25”S, 132 o 44’ 47”E, 13 September 1958, D.F. McMichael, AM P55727 & P88376; Kata Tjuta (= Mt. Olga), 25 o 17’ 22”E, 130 o 44’ 18”E, 11 August 1966, A Frecker & P. Keane, AM P55684 & P88157. Queensland: 105 km N of Hughenden, L. Louisa, 19 o 53’ 36”S, 144 o 15’10”E, 7 April 2009, BVT & MS, AM P89078; 7 km E of Boulia, burrow pit, 22 o 54’ 44”S, 139 o 58’24”E, 4 March 2011; BVT & MS, AM P89079; 2 km E of Boulia, swamp, 22 o 54’ 41”S, 139 o 55’ 30”E, 4 March 2011, BVT & MS, AM P90067; 76 km NE of Aramac, L Galilee Hazelmere Inlet, 22 o 26’ 00”S, 145 o 42’30”E, 15 February, 2010, BVT & MS, AM P90068. South Australia: Musgrave Ranges, Erliwunyawunya Rockhole, 29 May 1961, H.G. Cogger, AM P15286, P55685, P88143, P88380; Musgrave Ranges, 7 km S of Mt. Woodroffe, waterhole in Currie Creek tributary, 9 May 1983, 26 o 19.134’E. 131 o 44.715’E, W. Zeidler, SAM C7631; Everard Ranges, Carmeena Rockhole, 27 o 06.51’S, 132 o 33.011’E, 14 August 1914, Capt S. A. White, SAM C7632; Everard Homestead, Victoria Springs, 27 o 0.368’S, 132 o 42.565’E, 31 October 1970, E Matthews SAM C7646; Gawler Ranges, pool near Hiltaba Homestead, 32 o 09.422’S, 135 o 04.084’E, P. Aerfeldt & P. Cokerham, 14 October 1984, SAM 7633; Gawler Ranges, pool near Yarna Homestead, 32 o 03.213’S, 135 o 07.751’E, P. Aerfeldt & P. Cokerham, 15 October 1984, SAM C7634; Gawler Ranges, pool near Paney Homestead, 32 o 35.240’S, 135 o 25.803’E, P. Aerfeldt & P. Cokerham, 16 October 1984, SAM C7635; Gawler Ranges National Park, 40 km NE of Wudinna, Policemans Point, 32 o 35’ 17”S, 135 o 26’ 30”E, 5 October 2009, BVT, SAM C7636; 13.5 km NE of Minnipa, Pildappa Rock, western pit gnamma, 32 o 45’ 05”S, 135 o 13’ 48”E, 23 November 2003, BVT, SAM P7637; 25 km ENE of Wudinna, Peela Rock, northernmost pit gnamma, 33 o 00’ 09”S, 135 o 43’ 28”E, 26 October 2011, BVT, SAM C7638; Frances, Lake Cadnite, 36deg 42.685’S, 140deg 56.559’E, 6 May 1979, W. Zeidler, SAM C7639. Western Australia: Little Sandy Desert, Hutton Range, 16 km N, ca 24 o 46’S, 123 o 48’E, 4 September 1971,no collector recorded, WAM 51322; 83 km N of Northhampton, Euardy Station, roadside ditch, 27 o 36’ 31”S, 114 o 41’ 43”E, 5 July 2011, Koen Martens, WAM 51591; 50 km NW of Cue, pit gnamma on Walloo Hill, 27 o 14’ 47”S, 117 o 25’ 44”E, 23 August 2009, BVT, WAM 51592; Gibson Desert, Gunbarrel Highway, Mt Samuel, pool (probably one of the Mangi gnammas) 1.6 km WSW, 1 June 1966, 25 o 45’ 50”S, 125 o 55’ 50”E (for Mt Samuel), K. Davey. AM P55668, P88159; Great Victoria Desert, Knight Gnamma Holes, 28 o 12.795’S, 124 o 39.993’S, 25 August 2010, IAEB, WAM 51593; Great Victoria Desert, Sunday Surprise Rocks, 27 o 57.379’S, 125 o 00.350’E, 27 August 2009, IAEB, WAM 51594; 60 road km SE of Giles, Kutjurritari Gnammas, ca 25 o 17’S, 127 o 49’E, 23 September 2009, BVT, WAM 51595; Great Victoria Desert, Connie Sue Highway, gnammas 10 km W of Lake Serpentine, 26 August 1980, J.A. Forrest, WAM 51596; Warburton, Windaroo Rockhole, 21 June 1979, J. Blyth, WAM 51597; 71 km WSW of Menzies, pit gnamma on Scorpion Rocks, 29 o 51’ 10”S, 120 o 19’ 36”E, 10 October 2011, Bindy Datson, WAM 51598; Paynes Find area, 2 September 1991, no date or collector recorded, WAM 51317; 11 km NNW of Paynes Find, south pit gnamma on Bullamanya Rocks, 29 o 09’ 53”S, 117 o 39’ 36”E, 5 October 2010, BVT, WAM 51599; 15 km SW of Wubin, pit gnamma on Miamoon Rocks, 30 o 09’ 07”S, 116 o 20’ 45”E, 14 September 2003, BVT, WAM 51600; 25 km E of Wongan Hills, Dingo Rock, 30 o 50’ 41”S, 116 o 58’ 30”E, 27 September 2012, BVT, WAM 51601; 43 km NNW of Hyden, rock pool at base of Mt Walker; 32 o 04’ 11”S, 118 o 45’ 21”E, 31 August 2009, BVT, WAM 51602; 17 km NE of Hyden, northern pit gnamma at The Humps, 32 o 18’ 41”S, 118 o 57’ 37”E, 4 August 2005, BVT, WAM 51603; near Buncubbin, Dajoing, soak at Yalburnunging Rock, no date, E. Simpson, WAM 51318; 40 km NE of Mukinbudin, pit gnamma on Yanneymooning Rock, 30 o 43’ 04”S, 118 o 33’ 24”E, 24 October 2010, BVT, WAM 51604; 44 km S of Coolgardie, pit gnamma on Victoria Rock, 31 o 17’ 37”S, 120 o 55’ 32”E, 14 September 2002, IAEB & BVT, WAM 51605; 40 km E of Lake King Township, pit gnamma on Lilian Stokes Rock, 33 o 04’ 06”S, 120 o 05’ 49”E, 1 September 2009, BVT, WAM 51606; 95 km SW of Norseman, near Metcalf Lake, creek crossing, permanent water under rock tunnel, 32 o 28’ 30”S, 120 o 49’E, no date or collector recorded; WAM 51323; Dundas, rockhole, ca 32 o 27’S, 121 o 46’E, no date or collector, WAM 6735; 27.5 km NE of Norseman, Buldania Rocks, western pit gnamma, 4 December 1959, D.H. Edwards, AM P55661 & P88381; 89.6 road kms E of Norseman off Eyre Highway, Smithania Rock, June 1964, Lee, AM P55656 & P88153; 196 km E of Norseman, a pit gnamma on Balladonia Rock, 32 o 27’ 41”S, 123 o 51’ 48”E, 18 March 2007, BVT, WAM 51607. Diagnosis. Thoracopod I of male with endite VI with a broad almost rectangular base because of a distinct angular hump of about 110–120 o on the distal surface, and a short somewhat triangular process medially, much shorter than the base and reaching only about a third of the medial length of endite III, and not covering all the teeth on the distomedial surface of endite III. Description of male. Head (Fig 12B,C) subequal to body size, finely punctuate. Fornices broad, angulated and arcuate over second antennal base. Small mound centroposteriorly the site of the dorsal organ. Compound eyes close together about midway along central ridge and just posterior to the frontal pore and two small lateral setal fields. Ocellus deeply embedded beneath the setal fields. Rostral dorsal surface lower than surface posterior to compound eye, the junction marked by the lateral suture from the eye to the nearby fornix. Rostrum about as long as wide with upper surface significantly expanded terminally (by about 30% each side). Central carina bold and bifurcated distally associated with terminal truncation to form a broadly based triangular terminal facet. This facet ciliated on the ventral edge and almost at right angles to head alignment and with anterior margin of base straight. First antenna (Fig 12D) small, a little shorter than rostrum, and with two antennomeres. Proximal antennomere cylindrical with concave face terminally and supporting second antennomere. This antennomere subequal in length to the first, clavate and with a few short setae terminally and on dorsal distal surface. Second antenna (Fig 12E) biramous, well developed, twice as long as rostrum. Peduncle of three segments, proximal segment with 3–4 plumose setae, middle segment with 1–2 spines and the distal peduncular segment with about 8 short spines mainly at the base of the anterior ramus. Anterior ramus with about 25 antennomeres and ventral ramus with a few more antennomeres. Both rami with long plumose ventral setae, one per antennomere, while anterior ramus with short dorsal setae also. Labrum large, well developed, clothed in small setae. Mandible broadly spatulate. First maxilla typical for genus and second maxilla absent. Carapace (Fig 12A) with hinge line slightly arcuate, umbo lacking and no growth lines. Anterior margin broadly arcuate, curving evenly to ventral margin and back to the posterior, though posterior is slightly narrower so that deepest part of carapace a little before midway along its length. Dorsally carapace slightly arcuate, thus hiding the hinge line. Valves roundly inflated laterally. Carapace surface finely punctate. Abductor muscle scar in an anteriolateral position about twice its diameter from the margin and associated with oval imprint of maxillary glands lying at about 40 o to the hinge line. Thorax. Ten thoracic segments, each with paired thoracopods. Anal plate partly divided centroposteriorly, each half bearing a long seta. Somite below enlarged, even more divided centroposteriorly and each half bearing a small denticle apically. Thoracopod I (Fig 3E, 12F) modified as a clasping appendage, the right and left claspers equal in shape and size. Endite VI with a broad almost rectangular base because of a distinct angular hump of about 110–120 o on the distal surface, and a short somewhat triangular medial process, much shorter than the base and reaching only about a third of the medial length of endite III and not covering all the spines row on the distiomedial surface of endite III. Endite V cylindrical and straight, and about two and a half times longer than broad and four to five times larger than endite IV. Endite V with a vertical row of about 13 larger stout setae from about one third of the endite’s length to its apex and also with an oval field of numerous lithe setae centred about 90 o around the palp but spreading close to the distinct setal row and covering the distal two-thirds of the palp. Endite IV oval in profile and margined with numerous setae mainly on the side distal to Endite V. Endite III rectangular but distinctly narrowing distally and with major axis at right angles to thoracopod axis. A row of about nine triangular spines distiomedially and a large field of stout setae mediolaterally clumped distally. Thoracopod II of general form for Lynceus (Martin & Belk, 1988) and depicted for L. baylyi (Fig.11) with two significant differences: 1) it lacks serrated anterior setae, all anterior setae being naked and 2) the distal lobe of the exopod narrows evenly along its length instead of having a distinctly wider area near its base. Thoracopods III to XI similar to thoracopod II, though the last three much reduced in size and lacking epipodites and proximal lobe of the exopodites. Description of female: Head (Fig. 12G,H): general structure similar to male. Compound eyes, ocellus, frontal pore and setal fields as in male. However anterior dorsal carina not bifurcated and rostrum not truncated, so that rostrum a little longer than wide. Rostrum increases in width anteriorly by about 30% on each side. Central carinae bold and lateral suture marking boundary between higher posterior surface and lower rostral dorsal surface as in male. Anterior margin of rostrum arcuate, but with a small notch at each anteriolateral corner. Carapace as in male, umbo lacking, no growth lines, same size and shape. Egg mass, if present, visible through the carapace. Thorax. Twelve thoracic segments, the last three with a lamina abdominalis laterally (Fig 12J). This lamina with an obtuse process anteriorly, two subequal triangular lateral lobes and a larger triangular lateral lobe posteriorly. A thin digital process arising dorsolaterally from a broad swollen base between the clavate process and the first triangular lobe. Anal plate as in the male, but last somite more rounded than in male. Thoracopods. 12 pairs of thoracopods, diminishing in size posteriorly, and thoracopods IX and X with exopod dorsal lobes cylindrical and extending dorsally beyond thoracic dorsum. These, plus the lamina abdominalis, help to anchor the egg mass. Resting egg. (Fig 4E) Round, irregular low wide ridges enclosing enlongated irregular depressions. Size 111.5 ± 4.6 ųm (n = 5). Size. Length holotype 5.5 mm, paratypes (n=4) 5.2 – 5.8 (x = 5.5 ± 0.35 mm); height holotype 5.0 mm, paratypes 4.2 – 5.1 (x = 4.75 ± 0.36 mm), width holotype 4.4 mm. Length allotype 5.0 mm, paratypes 4.9 – 5.4 (x = 5.15 ± 0.21 mm), height allotype 4.7 mm, paratypes 4.2 – 5.2 (x = 4.6 ± 0.42 mm), width allotype 3.9 mm. Variability. In males the truncated terminal facet of the rostrum is not always at 90 o to the rostral axis, but may be as low as 75 o. The rostrum may be expanded terminally by about 20–25%, rather than 30%, and the dorsal carina is not always bold, hardly standing expressed beyond the rostral dorsal surface. On the clasper, the hump on the basal part of endite VI is not always so distinct as in the type, the endites V and IV are variable in shape and setation, and the spines on the distomedial corner of endite III vary from six to nine. Interestingly the sites in the distributional outlier of north Queensland, mostly have 22–26 large setae in the setal row on endite V and only five to seven teeth on the distomedial corner of endite III, whereas the average is about 15 setae and seven to nine teeth over most of the range in WA and SA. In females, the rostrum may not be as wide terminally as in the type and on the posteriolateral plate the size and shape of the lateral lobes are variable, but there is always only one dorsal digitiform process anteriorly. Distribution. L. magdaleanae sp. nov. occurs ubiquitously in deeper gnammas throughout the Wheatbelt (e.g. Fig. 9C) and adjacent Goldfields of Western Australia (except the strip from Beacon to Trayning occupied by L. baylyi sp.nov. ― see above). It also occurs in pit gnammas throughout the northern Eyre Peninsula, Gawler Ranges and northwestern half of South Australia and the southwestern Northern Terrritory, and sporadically in gnammas in the central deserts of Western Australia. L. magdaleanae sp. nov. is also established in northern Queensland but not in gnammas; these occurrences and habitat choice seem incongruous considering its widespread occurrence in gnammas in WA and western SA. Perhaps these northern Queensland records are of a separate species, but so far they are only distinguishable by a slightly different count of setae of endite V and of spines on the distomedial corner of endite III. Specimens from the Wheatbelt and Goldfields of Western Australia were previously misidentified by MZ and the author as L. macleayanus (see Bayly et al 2012; Passaq et al. 2011; Timms 2006, 2012; Zofkova 2007).Published as part of TIMMS, BRIAN V, 2013, A Revision of the Australian species of Lynceus Müller, 1776 (Crustacea: Branchiopoda: Laevicaudata, Lynceidae), pp. 501-533 in Zootaxa 3702 (6) on pages 521-524, DOI: 10.11646/zootaxa.3702.6.
Eulimnadia hansoni Timms, 2016, sp. nov.
No full textEulimnadia hansoni sp. nov. (Figs 9 E, 14) Etymology. This species is named for Sue and Roger Hanson, present owners of Bloodwood Station, Paroo, where the type locality is. This is a reward for their hospitality and assistance over many years to shrimp ecologists and taxonomists and recognition of their wise stewardship of the property which is central in the biodiversity hotspot for large branchiopods. Type locality. New South Wales, Paroo district, Bloodwood Station, 125 km NW of Bourke, Marsilea Pond, 29 o 32 ’ 13.5 ”S, 144 o 52 ’ 26.0”E, 12 November, 1999, BVT. Type material. Holotype. Male deposited in Australian Museum, Sydney, length 5.3 mm, height 3.1 mm, registration number AM P 97809. Allotype. Female deposited in Australian Museum, Sydney, length 5.6 mm, height 3.8 mm, registration number AM P 97810. Paratypes. Five females, 4.7 x 3.1 mm, 4.7 x 3.1 mm, 4.6 x 3.1 mm, 4.2 x 2.6 mm, 4.1 x 2.6 mm, registration number AM P 97811. Other Material. New South Wales: 125 km NW of Bourke, Bloodwood Station, small unnamed pond NW of Monogan’s Pan, 29 o 26 ’ 51.3 ”S, 144 o 48 ’ 39.4 ”E, 6 June 2007, BVT, AM P 97812; Bloodwood Station, Lower Crescent Pool, 29 o 32 ’ 36.5 ”S, 144 o 51 ’ 29.4 ”E, 29 April 1998, BVT, AM P 97813; 130 km NW of Bourke, Tredega Station, a blackbox swamp near homestead, 29 o 28 ’ 57.8 ”S, 144 o 52 ’ 02.8”E, 22 February 2011, MS & BVT, AM P 97814; Queensland: Currawinya Nat Pk, creek between Paroo R and Lake Kaponyee, 28 o 50 ’ 00.3”S, 144 o 21 ’ 16.0”E, 17 May 1996, AM P 97815; 47 km E of Thargomindah, roadside pool, 28 o 05’ 12.4 ”S, 144 o 16 ’ 40.3 ”E, 27 February 2011, MS & BVT, AMP 85610; via Thargomindah, a coolabah swamp, 28 o 50 ’ 51.9 ”S, 143 o 53 ’ 54.4 ”E, 26 February 2011, MS & BVT, AM P 85611. Diagnosis. Egg with about 30 deep polygons, each with a central linear depression and marginally fringed. 18 trunk segments. Clasper with about 8 spines of uniform length at junction of the two palpomeres of the large palp and with a similar spine mediolaterally on basal palpomere. Cercopod setae short, usually not much longer than diameter of cercopod, and numbering about 12–15. Telsonic spines about 15, generally fairly evenly spaced and sized. Description. Egg (Fig 9 E) spherical, diameter 185–192 Μm (n = 5), with about 30 deep polygons, each with a central linear depression, marginally fringed, the fringe extruded into weak spines mainly at polygon junctions. These spines about the same length as the depth of each polygon. Tertiary layer spongiform and surface microporous. Male. Head (Fig 14 C) with ocular tubercle prominent, the compound eye occupying most (ca 80 %) of it. Rostrum subequal in size to ocular tubercle, asymmetrical and most prominent dorsally with a rounded apex and an ocellus basodorsally. Frons-rostrum angle about 110 o. Dorsal organ posterior to eye by about its height, pedunculate about height of ocular tubercle. First antenna distinctly longer than peduncle of second antennae, and with 8 lobes, each with numerous short sensory setae. Second antenna with a spinose peduncle and each flagella with 8 antennomeres, dorsally with 1–4 spines and ventrally with 1–4 longer setae. Basal and distal antennomeres with minimal spines, though setae maximal on distal antennomeres. Carapace (Fig 14 A) elongated oval, pellucid and with hardly any indication of growth lines. Adductor muscle scar at about 30 o to the horizontal axis of carapace. Thoracopods. Eighteen pairs, the first two modified as claspers (Fig 14 G). Claspers with palm trapezoidal, apical club rounded with thick denticles distomedially and spine apicolaterally, moveable finger of normal curved structure and palps of typical structure. Moveable finger terminating in a suctorial disc distoventrally and with many small pits distodorsally. Long palp subequal in length to the palm in the first clasper and about 1.5 x longer in second clasper; both two-segmented with about 8 spines at their junctions. Each with a spine medolaterally on the basal palpomere. All these spines a little longer than palpomere diameter. Other thoracopods of typical structure for Eulimnadia, decreasing in size and complexity after 10 th thoracopod. Trunk. Dorsal surface with 1–2 short spines medially or posteriorly on each of the posterior 12 trunk segments. Telson (Fig 14 E) with about 15 pairs of dorsal spines; a little variation in size and spacing. Most spines naked. Caudal filaments originating from a mound a little higher than the dorsal telsonic floor and between the 3 rd and 4 th spine. This dorsal floor sloping evenly posteriorly to base of cercopod. Cercopod a little longer than telson dorsum, the basal 80 % hardly thinning to a small naked spine, then rapidly thinning to an acute apex. About 15 short setae (all a little longer than cercopod diameter) on dorsum of basal 80 % and a cirrus of tiny denticles dorsolaterally on apical 20 % of cercopod. All setae two-segmented and with more setules on distal segment than on basal. Prominent spiniform projection beneath the cercopods at the ventroposterior corner of the telson. Hermaphrodite. Head (Fig 14 D) with ocular tubercle prominent, with compound eye occupying most (ca 80 %) of it. Rostrum a smooth bulge at an angle of about 160 o to the frons and with the ocellus basodorsal. Ocellus about 40 % size of eye. Dorsal organ posterior to eye bya bout its height, pedunculate and asymmetrical and subequal in height to ocular tubercle. First antenna subequal in length to the peduncle of second antenna, with six small lobes each with many short sensory setae. Second antenna as in male. Carapace (Fig 14 B) as in male, though dorsum more vaulted. Thoracopods. Eighteen of typical Eulimnadia structure. Trunk dorsum with 3–9 setae terminally, these setae few, short and stout on posterior few segments, numerous and longer on segments 8–15 and hardly any setae on anterior trunk segments 1–7. Telson (Fig 14 F) as in male, though with 14 cercopod setae. Variability. Many meristic structures vary numerically so that telsonic spines can number 12–16, cercopod setae 11–15, first antennal lobes 7–9 in male and 5–7 in females, and clasper palp spines 7–9. Eggs can lack spines (maybe they have worn off in older eggs) and can have about 40 polygons. Only rarely do antennomeres of the second antenna number more than 8, and then only to 9. Comments. While many features are within the range usually seen in Eulimnadia, the cercopod setae are distinctive as they are short and numerous, whereas in many other species they are long (e.g. E. dahli) or distinctly fewer in number (e.g. E. centenaria sp. nov.). In having about 15 telsonic spines fairly uniform in size and spacing, this species is distinct from others with fewer spines (e.g. E. uluruensis sp. nov.), irregular spacing and size (e.g. E. centenaria sp. nov.), or with> 16 spines (e.g. E. contraria sp. nov.). Many Australian species of Eulimnadia have 5 spines at the palpomere junctions, but E. hansoni has 8 spines plus another midlaterally on the basal palpomere, to make this species unique. The eggs are also distinctive with their frilled polygons, though these can be like those of E. dahli and E. gnammaphila sp. nov. eggs in form, there are differences, with those of E. hansoni with about 30 polygons and with a frothy surface. Eulimandia hansoni could be any one of four of Schwentner et al ’s (2015) species G, H, K or 0, such was the high syntopy in many Paroo sites. Few males occur in the collections, suggesting androdiocious mode of reproduction (Weeks et al., 2008). Distribution. Central and northern Paroo and Bulloo River systems. It may be more widespread as specimens in AM P 10145 from Central Australia and AM P 91993 from near Aramac, central Qld have some similarities, but there are too few specimens for a detailed study.Published as part of Brian V Timms, 2016, A partial revision of the Australian Eulimnadia Packard, 1874 (Branchiopoda: Spinicaudata: Limnadiidae), pp. 351-389 in Zootaxa 4066 (4) on pages 374-376, DOI: 10.11646/zootaxa.4066.4.1, http://zenodo.org/record/26423
Eulimnadia hansoni Timms, 2016, sp. nov.
No full textEulimnadia hansoni sp. nov. (Figs 9 E, 14) Etymology. This species is named for Sue and Roger Hanson, present owners of Bloodwood Station, Paroo, where the type locality is. This is a reward for their hospitality and assistance over many years to shrimp ecologists and taxonomists and recognition of their wise stewardship of the property which is central in the biodiversity hotspot for large branchiopods. Type locality. New South Wales, Paroo district, Bloodwood Station, 125 km NW of Bourke, Marsilea Pond, 29 o 32 ’ 13.5 ”S, 144 o 52 ’ 26.0”E, 12 November, 1999, BVT. Type material. Holotype. Male deposited in Australian Museum, Sydney, length 5.3 mm, height 3.1 mm, registration number AM P 97809. Allotype. Female deposited in Australian Museum, Sydney, length 5.6 mm, height 3.8 mm, registration number AM P 97810. Paratypes. Five females, 4.7 x 3.1 mm, 4.7 x 3.1 mm, 4.6 x 3.1 mm, 4.2 x 2.6 mm, 4.1 x 2.6 mm, registration number AM P 97811. Other Material. New South Wales: 125 km NW of Bourke, Bloodwood Station, small unnamed pond NW of Monogan’s Pan, 29 o 26 ’ 51.3 ”S, 144 o 48 ’ 39.4 ”E, 6 June 2007, BVT, AM P 97812; Bloodwood Station, Lower Crescent Pool, 29 o 32 ’ 36.5 ”S, 144 o 51 ’ 29.4 ”E, 29 April 1998, BVT, AM P 97813; 130 km NW of Bourke, Tredega Station, a blackbox swamp near homestead, 29 o 28 ’ 57.8 ”S, 144 o 52 ’ 02.8”E, 22 February 2011, MS & BVT, AM P 97814; Queensland: Currawinya Nat Pk, creek between Paroo R and Lake Kaponyee, 28 o 50 ’ 00.3”S, 144 o 21 ’ 16.0”E, 17 May 1996, AM P 97815; 47 km E of Thargomindah, roadside pool, 28 o 05’ 12.4 ”S, 144 o 16 ’ 40.3 ”E, 27 February 2011, MS & BVT, AMP 85610; via Thargomindah, a coolabah swamp, 28 o 50 ’ 51.9 ”S, 143 o 53 ’ 54.4 ”E, 26 February 2011, MS & BVT, AM P 85611. Diagnosis. Egg with about 30 deep polygons, each with a central linear depression and marginally fringed. 18 trunk segments. Clasper with about 8 spines of uniform length at junction of the two palpomeres of the large palp and with a similar spine mediolaterally on basal palpomere. Cercopod setae short, usually not much longer than diameter of cercopod, and numbering about 12–15. Telsonic spines about 15, generally fairly evenly spaced and sized. Description. Egg (Fig 9 E) spherical, diameter 185–192 Μm (n = 5), with about 30 deep polygons, each with a central linear depression, marginally fringed, the fringe extruded into weak spines mainly at polygon junctions. These spines about the same length as the depth of each polygon. Tertiary layer spongiform and surface microporous. Male. Head (Fig 14 C) with ocular tubercle prominent, the compound eye occupying most (ca 80 %) of it. Rostrum subequal in size to ocular tubercle, asymmetrical and most prominent dorsally with a rounded apex and an ocellus basodorsally. Frons-rostrum angle about 110 o. Dorsal organ posterior to eye by about its height, pedunculate about height of ocular tubercle. First antenna distinctly longer than peduncle of second antennae, and with 8 lobes, each with numerous short sensory setae. Second antenna with a spinose peduncle and each flagella with 8 antennomeres, dorsally with 1–4 spines and ventrally with 1–4 longer setae. Basal and distal antennomeres with minimal spines, though setae maximal on distal antennomeres. Carapace (Fig 14 A) elongated oval, pellucid and with hardly any indication of growth lines. Adductor muscle scar at about 30 o to the horizontal axis of carapace. Thoracopods. Eighteen pairs, the first two modified as claspers (Fig 14 G). Claspers with palm trapezoidal, apical club rounded with thick denticles distomedially and spine apicolaterally, moveable finger of normal curved structure and palps of typical structure. Moveable finger terminating in a suctorial disc distoventrally and with many small pits distodorsally. Long palp subequal in length to the palm in the first clasper and about 1.5 x longer in second clasper; both two-segmented with about 8 spines at their junctions. Each with a spine medolaterally on the basal palpomere. All these spines a little longer than palpomere diameter. Other thoracopods of typical structure for Eulimnadia, decreasing in size and complexity after 10 th thoracopod. Trunk. Dorsal surface with 1–2 short spines medially or posteriorly on each of the posterior 12 trunk segments. Telson (Fig 14 E) with about 15 pairs of dorsal spines; a little variation in size and spacing. Most spines naked. Caudal filaments originating from a mound a little higher than the dorsal telsonic floor and between the 3 rd and 4 th spine. This dorsal floor sloping evenly posteriorly to base of cercopod. Cercopod a little longer than telson dorsum, the basal 80 % hardly thinning to a small naked spine, then rapidly thinning to an acute apex. About 15 short setae (all a little longer than cercopod diameter) on dorsum of basal 80 % and a cirrus of tiny denticles dorsolaterally on apical 20 % of cercopod. All setae two-segmented and with more setules on distal segment than on basal. Prominent spiniform projection beneath the cercopods at the ventroposterior corner of the telson. Hermaphrodite. Head (Fig 14 D) with ocular tubercle prominent, with compound eye occupying most (ca 80 %) of it. Rostrum a smooth bulge at an angle of about 160 o to the frons and with the ocellus basodorsal. Ocellus about 40 % size of eye. Dorsal organ posterior to eye bya bout its height, pedunculate and asymmetrical and subequal in height to ocular tubercle. First antenna subequal in length to the peduncle of second antenna, with six small lobes each with many short sensory setae. Second antenna as in male. Carapace (Fig 14 B) as in male, though dorsum more vaulted. Thoracopods. Eighteen of typical Eulimnadia structure. Trunk dorsum with 3–9 setae terminally, these setae few, short and stout on posterior few segments, numerous and longer on segments 8–15 and hardly any setae on anterior trunk segments 1–7. Telson (Fig 14 F) as in male, though with 14 cercopod setae. Variability. Many meristic structures vary numerically so that telsonic spines can number 12–16, cercopod setae 11–15, first antennal lobes 7–9 in male and 5–7 in females, and clasper palp spines 7–9. Eggs can lack spines (maybe they have worn off in older eggs) and can have about 40 polygons. Only rarely do antennomeres of the second antenna number more than 8, and then only to 9. Comments. While many features are within the range usually seen in Eulimnadia, the cercopod setae are distinctive as they are short and numerous, whereas in many other species they are long (e.g. E. dahli) or distinctly fewer in number (e.g. E. centenaria sp. nov.). In having about 15 telsonic spines fairly uniform in size and spacing, this species is distinct from others with fewer spines (e.g. E. uluruensis sp. nov.), irregular spacing and size (e.g. E. centenaria sp. nov.), or with> 16 spines (e.g. E. contraria sp. nov.). Many Australian species of Eulimnadia have 5 spines at the palpomere junctions, but E. hansoni has 8 spines plus another midlaterally on the basal palpomere, to make this species unique. The eggs are also distinctive with their frilled polygons, though these can be like those of E. dahli and E. gnammaphila sp. nov. eggs in form, there are differences, with those of E. hansoni with about 30 polygons and with a frothy surface. Eulimandia hansoni could be any one of four of Schwentner et al ’s (2015) species G, H, K or 0, such was the high syntopy in many Paroo sites. Few males occur in the collections, suggesting androdiocious mode of reproduction (Weeks et al., 2008). Distribution. Central and northern Paroo and Bulloo River systems. It may be more widespread as specimens in AM P 10145 from Central Australia and AM P 91993 from near Aramac, central Qld have some similarities, but there are too few specimens for a detailed study.Published as part of Brian V Timms, 2016, A partial revision of the Australian Eulimnadia Packard, 1874 (Branchiopoda: Spinicaudata: Limnadiidae), pp. 351-389 in Zootaxa 4066 (4) on pages 374-376, DOI: 10.11646/zootaxa.4066.4.1, http://zenodo.org/record/26423
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