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LeCroy data
No full textMeasurements of wing, tail, and tarsus lengths in 14 populations of birds of paradise in the genus Paradisaea (from LeCroy, M. 1981. The genus Paradisaea - display and evolution. American Museum Novitates 2714:1-52.). Measurements for each population (mm) are standardized (divided by average within population standard deviation for that trait and sex*)
Mexorchestia Wildish & LeCroy 2014
No full textMexorchestia Wildish & LeCroy, 2014 Mexorchestia Wildish & LeCroy, 2014: 561. “ Tethorchestia ”.— LeCroy, 2011: 757. Type species. Mexorchestia carpentaria carpentaria Wildish & LeCroy, 2014, original designation. Included species. Mexorchestia includes 1 species: M. carpenteri Wildish & LeCroy, 2014. Category. Mascupod. Ecological type. Beach-hopper. Habitat. Found on bare white sand and from wrack consisting of macroalgae and mangrove litter (Wildish & LeCroy 2014). Diagnostic description ( male ). Based on Wildish & LeCroy (2014). Head. Antenna 2 peduncular articles slightly incrassate . Mandible left lacinia mobilis 5-cuspidate (tiny fifth cusp), or 4-cuspidate. Labium without inner lobes. Maxilliped palp article 2 with distomedial lobe; article 4 reduced, button-shaped. Pereon. Gnathopod 1 sexually dimorphic; subchelate; posterior margin of carpus and propodus each with lobe covered in palmate setae; propodus anterior margin with 2 groups of robust setae, ‘subtriangular’ with welldeveloped posterodistal lobe, palm transverse; dactylus? simplidactylate. Gnathopod 2 subchelate; propodus palm acute, evenly rounded, without palmar sinuses; without large distal sinus; without proximal spine or thumb defining palm; dactylus attenuated distally. Pereopods 3–7 dactyli bicuspidactylate. Pereopod 4 dactylus amplidactylate, thickened proximally with notch midway along posterior margin. Pereopod 6 shorter than pereopod 7; not incrassate; basis expanded; male merus and carpus not expanded. Pereopod 7 not incrassate; basis broadly expanded; posterior margin smooth or minutely serrate margin with numerous small robust setae, posterodistal lobe absent; merus slightly expanded distally, subtriangular, anterior margin slightly convex; carpus unexpanded, subrectangular; propodus broad; length 6.7 × width, male with large distal tuft of setae. Oostegites (female) setae with spatulate tips . Pleon. Pleopods all slightly reduced. Uropod 1 peduncle distolateral robust seta absent; exopod without marginal robust setae; endopod with marginal robust setae in 1 row. Uropod 2 exopod with marginal robust setae in 1 row; endopod with marginal robust setae in 2 rows. Uropod 3 ramus shorter than peduncle. Telson apically incised, with 7 to at least 10 robust setae per lobe. Remarks. Wildish & LeCroy (2014) discuss the very close relationship between Mexorchestia and Tethorchestia. They distinguish the genera on the relative development of the distolateral robust seta on the peduncle of uropod 1, the shape of the female gnathopod 2 basis and the shape of the oostegites. The slightly incrassate second antenna and large distal tuft of setae on the propodus of pereopod 7 and the distally attenuated dactylus of gnathopod 2 distinguish Mexorchestia and Tethorchestia from all other platorchestiine genera. There are several other characters separating these genera. Mexorchestia has a slightly incrassate antenna 2 (incrassate in Tethorchestia); pereopod 6 merus expanded in Mexorchestia (not expanded in Tethorchestia), pereopod 7 basis without a posterodistal lobe in Mexorchestia (present in Tethorchestia) and oostegites with spatulate tips in Mexorchestia (simple in Tethorchestia). Distribution. USA: Florida. Caribbean Sea, Yucatan Peninsula to Belize (Wildish & LeCroy 2014).Published as part of Lowry, J. K. & Myers, A. A., 2022, Platorchestiinae subfam. nov. (Amphipoda, Senticaudata, Talitridae) with the description of three new genera and four new species, pp. 1-53 in Zootaxa 5100 (1) on page 27, DOI: 10.11646/zootaxa.5100.1.1, http://zenodo.org/record/612768
Colomastix processa LECROY, 2009, sp. nov.
No full text<i>Colomastix processa</i> sp. nov. <p>(Figs 9, 10, Pl. 2F)</p> <p> <b>Type material.</b> Holotype, male, 4.1 mm, AM P71208 (QLD 1755), Horseshoe Reef, Lizard Island (14°41.21'S 145°26.49'E), large coral bommies surrounded by sand and rubble, ex. sponge <i>Spirastrella vagabunda</i> Ridley, 1884, 8– 12 m, K. Klebba & L. Hughes, 2 March 2005. Paratypes: 1 female, AM P71215 (QLD 1760), Horseshoe Reef, Lizard Island (14°41.21'S 145°26.49'E), large coral bommies surrounded by sand and rubble, unidentified sponge, 9–10 m, C. Serejo, 2 March 2005. 4 males, 4 females, AM P71235, same data.</p> <p> <b>Additional material examined.</b> 1 female, AM P24201 (SBS 1013005); 4 males, 2 females, AM P24203 (SBS 76320); 2 males, AM P24205 (SBS 1013005); 1 female, AM P24200 (SBS 0913006); 1 male, AM P24207 (SBS 0913006); 1 male, AM P78983 (SBS 0913006); 1 male, 6 females, AM P37536 (NSW 169).</p> <p> <b>Type locality.</b> Horseshoe Reef, Lizard Island, Queensland, Australia (14°41.21'S 145°26.49'E).</p> <p> <b>Etymology.</b> From the Latin ' <i>processus</i> ', meaning 'go forward, advance', referring to the anteriorly directed spur on the anteroventral margin of the basis of gnathopod 2 in the male.</p> <p> <b>Description.</b> Based on holotype, male, 4.1 mm, AM P71208 and paratype series of 4 males, AM P71235.</p> <p> <b>Head.</b> <i>Head</i> as long as deep, subequal in length to pereon segment 1 and half of pereon segment 2 combined; rostrum absent; interantennal plate with anteroventral angle extending slightly beyond anterodorsal angle, anterior margin straight to slightly concave, weakly serrate, with 1 ventral tooth. <i>Antennae 1–2</i> marginal robust setae moderately long. <i>Antenna 1</i> peduncle article 1, dorsomedial margin with 4–5 robust setae. <i>Antenna 2</i> peduncle articles 3–5, ventrolateral margin without small, triangular robust setae; peduncle article 3, distomedial angle with 2 robust setae, without slender setae or process, dorsomedial margin with 1– 2 robust setae, ventromedial surface without robust setae; peduncle article 5, dorsal margin without stubby robust setae. <i>Mouthparts</i> other than maxilliped moderately reduced. <i>Maxilliped</i> inner plates completely fused, basal shell expanded to form a ventral keel, keel distally rounded.</p> <p> <b>Pereon.</b> <i>Coxa 1</i> anterior margin strongly concave, anteroventral angle narrowly produced. <i>Coxae 1–4</i> with small anteroventral cusp. <i>Coxal gills</i> 2–5 gradually increasing in size, gill 6 subequal to gill 5. <i>Gnathopod 1</i> elongate, slender; propodus with pectinate apical setae. <i>Gnathopod 2</i> basis moderately expanded distally, anterior margin entire, without anterodistal notch, with anterodistal process; ischium with inner anterodistal lobe expanded; carpus slightly shorter than propodus, inner ventral surface with patch of setae, setae short, very fine; propodus slightly enlarged, inner ventral surface with patch of setae, setae short, very fine or setae elongate, slender, palm not excavate, with 4 dissimilar, unequally spaced processes, palmar angle with 2 processes, proximal process subequal to adjacent middle process, subtriangular, apical margin entire, both middle processes broad, rounded, process at dactylar hinge small, subtriangular; dactylus, insertion on propodus apical, with small process on posterior margin, tip lanceolate, subacute. <i>Pereopods 3–4</i> basis not produced anterodistally. <i>Pereopods 3–7</i> basis slightly expanded. <i>Pereopod 7</i> propodus, anterior margin without setae.</p> <p> <b>Pleon.</b> <i>Pleopods 1–3</i> inner ramus with 4 articles, outer ramus with 4 articles. <i>Pleopod 2</i> peduncle, anteromedial surface without slender setae. <i>Uropod 1</i> inner ramus modified, not strongly falcate, not expanded proximally, ventral margin straight, tip bulbous, with small subapical slender seta, with acute triangular dorsoapical process (may occasionally be absent or broken); outer ramus three-fourths length of inner ramus, tip lanceolate, subacute. <i>Uropod 2</i> both rami, ventral margin lacking setae. <i>Uropod 3</i> peduncle twice as long as deep; inner ramus lanceolate, slightly longer than outer ramus, ventral margin lacking setae. <i>Telson</i> broadly subtriangular, dorsal surface convex, tip rounded, with 3 lobes or processes, with 1–2 apical minute slender setae.</p> <p> <b>Female</b> (sexually dimorphic characters). Based on paratype series of 4 females, AM P71235. <i>Oostegite 2</i> narrowly subovate (length:width ratio 3:1 or greater), approximately twice as long as basis of gnathopod 2. <i>Gnathopod 2</i> basis linear, unexpanded distally, with anterodistal notch, without anterodistal process; ischium with inner anterodistal lobe not expanded; carpus subequal to propodus in length; propodus unenlarged, inner ventral surface with patch of setae, setae short, very fine, palm without teeth or processes; dactylus, insertion on propodus subapical, without process on posterior margin. <i>Pereopods 3–7</i> basis unexpanded. <i>Uropod 1</i> inner ramus unmodified, lanceolate; outer ramus slightly shorter than inner ramus. <i>Uropod</i> 3 inner ramus approximately one-third longer than outer ramus. <i>Telson</i> tip without lobes or processes.</p> <p> <b>Adult body length.</b> 3.2–6.4 mm. Males attain slightly larger sizes than females.</p> <p> <b>Colour in life.</b> Eyes with small, discrete, red spots on a white background. Antennae banded with reddish pink in the male, banding pale or absent in the female; pereon and pleon with large reddish blocks of pigment on a translucent grey or whitish background, coxae each with a single large pigment spot anterodistally. This pattern is similar to that of <i>Colomastix plumosa</i>, but the lateral pigment blocks on the pereon segments are single in <i>C. plumosa</i> rather than double as in <i>C. processa</i> <b>sp. nov.</b> and the placement of the coxal spots is proximal vs. anterodistal. Also, the antennae are more strongly banded in the female and there is lateral pigmentation on pleon segment 3 in <i>C. plumosa</i>.</p> <p> <b>Host.</b> The sponges <i>Spirastrella vagabunda</i> Ridley, 1884; <i>Polymastia craticia</i> Hallmann, 1912; and <i>Teichonopsis labyrinthica</i> (Carter, 1886).</p> <p> <b>Habitat.</b> Coral reef, rock and rubble habitats.</p> <p> <b>Depth range.</b> 8–25 m.</p> <p> <b>Remarks.</b> <i>Colomastix processa</i> <b>sp. nov.</b> differs from all other known species of <i>Colomastix</i> in the ornamentation of the anterior margin of the basis of gnathopod 2 in both sexes, with an anterodistal process in the male and an anterodistal notch in the female. It does not appear to be closely similar to any known species of <i>Colomastix</i>, although the bulbous modification of the tip of the inner ramus of uropod 1 in the male resembles that of three Atlantic species of the genus, <i>C. bousfieldi</i>, <i>C. heardi</i> and <i>C. gibbosa</i> LeCroy, 1995. However, unlike these three species, there is no subapical dorsal notch on the inner ramus of uropod 1 in <i>C. processa</i> <b>sp. nov.</b> and the tip is more highly modified. The broadly rounded frontal margin of the head in this species is similar to that of <i>C. brevicornis</i> Ledoyer 1982, but the antennae, gnathopods, uropods and telson are all quite different from those of that species. Gnathopod 2 of the male is quite distinctive as well, with an enlarged carpus and only moderately enlarged propodus. Although <i>C. laminosa</i> and <i>C. azumai</i> Hirayama & Kikuchi 1980 appear to share this feature based on their original descriptions (Lyons & Myers 1990; Hirayama & Kikuchi 1980), the material on which these descriptions were based appears to be immature and the relative proportions of these articles changes developmentally. The adult male remains unknown for <i>C. laminosa</i>, but the adult male of <i>C. azumai</i> has a greatly enlarged propodus and a small carpus (Ariyama 2005). <i>Colomastix processa</i> is currently only known from its type locality on Lizard Island and from several locations in New South Wales.</p> <p> <b>Distribution.</b> <i>Australia</i>. New South Wales: Port Jackson, Turrametta Head, Mona Vale and Broken Bay (current study). Queensland: Lizard Island (current study).</p>Published as part of <i>LECROY, SARA E., 2009, Colomastigidae *, pp. 348-372 in Zootaxa 2260 (1)</i> on pages 363-367, DOI: 10.11646/zootaxa.2260.1.17, <a href="http://zenodo.org/record/10093425">http://zenodo.org/record/10093425</a>
Mexorchestia carpenteri subsp. carpenteri Wildish & Lecroy, 2014, n. sp.
No full textMexorchestia carpenteri carpenteri n. sp. and subsp. (Figures 3–6) Tethorchestia species B: Bousfield, 1984, pp. 204–205, tab. 6. “ Tethorchestia ” sp. B: LeCroy, 2011, pp. 757–758, fig. 590. Type material. Holotype: Male, 11.5 mm; Tiger Tail Beach, Marco Island, Florida, U.S.A.; 25 ° 56.7 ′ N, 81 ° 44.6 ′ W; D.J. Wildish; 23 February 2004; bare sand above high water line; USNM 1218141. Slide material from holotype, USNM 1218141. Allotype: Ovigerous female, 8 mm, same data as holotype; USNM 1218142. Slide material from allotype, USNM 1218142. Paratypes: 9 males, 5 females, 1 juvenile; same data as holotype; 10 March 2007; USNM 1218143. 1 male, 6 females; same data as holotype; 28 February 2004; CMNC- 2012 -0020. 2 males; 2 females; same data as holotype; 29 February 2004; USNM 1218144. 13 males, 18 females, 4 juveniles; Tiger Tail Beach, Marco Island, Florida; S.E. LeCroy; 15 July 2006; among fiddler crab burrows and Halodule detritus on edge of inlet behind dunes, slightly muddy sand flat; GCRL 0 6521. Type locality. Tiger Tail Beach, Marco Island, Florida, U.S.A. (25 ° 56.7 ′ N, 81 ° 44.6 ′W). General habitat: a saltmarsh behind the main beach facing the Gulf of Mexico, with a brackish pool subject to tidal changes. Parts of the marsh were being re-colonized by mangroves, marsh grass and saltwort, Batis maritima. Hoppers were found on bare, white sand above the recent HW line in association with the fiddler crab, Uca pugilator. The fresh, moist digging pellets around the crab holes were coloured green/brown, suggesting microalgal growth. The hoppers sheltered under the damp digging wastes and did not burrow. Little wrack was present during sampling by DJW and it is possible that the hoppers were feeding on the microalgae within the digging pellets. Other material examined. 2 males, 6 females, 9 juveniles; Indian River Lagoon at Route 406, Merritt Island, Titusville, Florida; 28 ° 37.61 ′ N, 80 ° 47.35 ′ W; S. Kent; October 2009; in Syringodium wrack on sand/shell beach; GCRL 0 6522. 12 males, 15 females, 10 juveniles; John U. Lloyd Beach, Ft. Lauderdale, Florida, U.S.A.; 24 ° 50.78 ′ N, 80 ° 44.67 ′ W; S.E. LeCroy; 12 July 2006; under Sargassum drift on sand beach just above high tide line; GCRL 0 6523. 9 males, 8 females; Spanish Harbor Key, Florida, U.S.A., R.W. Heard; 11 October 2004; among beach wrack; ARC 79187. 6 males, 5 females, 7 juveniles; Anne’s Beach, Lower Matacumbe Key, Florida; S.E. LeCroy; 14 October 2004; under Thalassia and Syringodium wrack on a sandy substrate; ARC 79188. 1 male; Goodland Bay Bridge, Florida, U.S.A.; 25 ° 56.001 'N, 81 ° 38.985 '; D.J. Wildish; 11 March 2007; with Tethorchestia antillensis under mangrove litter on sandy beach; USNM 1218145. 2 males, 3 females; near Cedar Key, Florida, U.S.A.; 29 ° 0 8.143 ' N 83 ° 0 2.705 ' W; D.J. Wildish; 18 March 2007; among 6 individuals of Platorchestia platensis in eelgrass wrack on a sand beach, near fiddler crab holes, saltwort and mangrove leaves absent; USNM 1218149. 1 male; Lower Suwanee saltmarsh, Florida, U.S.A.; 29 ° 12.409 ' N, 83 ° 0 4.099 ' W; D.J. Wildish; 18 March 2007; among 5 individuals of O rchestia grillus under woody marsh grass (black needle rush, marsh, cord and saltgrass) wrack on a sandy upper shore, with fiddler crab holes and saltwort; USNM 1218148. 2 males, 1 female; Shired Island beach, Florida, U.S.A.; 29 ° 23.661 ′ N, 83 ° 12.158 ′ W; D.J. Wildish; 16 March 2007; with Orchestia grillus under recent, copious wrack consisting mainly of red and green macroalgae, fiddler crab holes and creeping stolons of saltwort present on upper beach; USNM 1218146. 58 (all life history stages); Hagen’s Cove, Florida, U.S.A.; 29 ° 46.267 ' N, 83 ° 34.753 ' W; D.J. Wildish; 17 March 2007; under marine wrack (mainly eelgrass) on a sandy upper beach, near fiddler crab holes and with saltwort, but no mangrove, present; USNM 1218147. 3 males, 3 females, 2 juveniles; North Beach, Perdido Key, Florida, U.S.A.; S.E. LeCroy; 14 July 1993; ARC 79189. 5 males, 9 females, 6 juveniles; Riviera Beach, Texas, U.S. A; 27 ° 17.20 ' N, 97 ° 10.19 ' W; S.E. LeCroy; 2 May 1999; under wrack principally consisting of Halodule; ARC 79190. 4 males, 11 females, 5 juveniles; Port Mansfield, Texas, U.S.A.; 26 ° 34.13 ' N, 97 ° 25.73 'W; S.E. LeCroy; 1 May 1999; from Syringodium wrack; ARC 79191. 7 males, 5 females, 4 juveniles; South Padre Island, Texas, U.S.A.; 26 ° 0 4.69 ' N, 97 ° 10.19 ' W; S.E. LeCroy 30 May 1999; ARC 79192. Maximum body length (N = 222): males 14 mm, females 9 mm. Diagnosis. Small talitrids (<14 mm). Antenna 2, flagellum with 13–18 articles in adult males; ovigerous female antenna 2 with 11–13 articles, oostegite 2 with 17–35 marginal setae; telson, each lobe with 1 distal dorsolateral robust seta; dorsal pigment pattern in both sexes diamond-shaped on cephalon (may be absent), linear, quadrate or diamond-shaped on mid-line of pleon (always present). Description. Based on male holotype, 11.5 mm. Cephalon (Fig. 3): Deeper than long; eyes round, with less than one diameter between them when viewed dorsally. Antenna 1 short, not or little exceeding the junction between peduncle articles 4 and 5 of antenna 2; flagellum 6 -articulate. Antenna 2 short, reaching only to second peraeon segment, peduncle slightly incrassate; flagellum 18 -articulate, slightly longer than peduncle, each article with two groups of bristles, within each group, some bristles directed forward, some laterally. Mouthparts (Fig. 3): Upper lip sub-ovate, apex with fine setae. Lower lip with lateral lobes slightly divergent, minute setae present in inner cleft and on anterior surface. Left mandible with 4–5 -dentate lacinia mobilis, strong molar process. Right mandible with 3–5 -dentate incisor, 2–3 -dentate lacinia mobilis. Maxilla 1, inner plate narrow, with 2–3 terminal plumose slender setae, long fine setae on inner margin; outer plate with vestigial 2 -articulate palp on outer margin, very short fine setae on inner margin, apical robust setae curved, serrated near tip. Maxilla 2, both plates subequal in size; inner with single strong plumose slender seta at midpoint of inner margin, short robust setae lining distal half of margin; outer plate with two types of short and long robust setae apically, with fine setae proximally on outer margin. Maxilliped, inner plates with 3 stout robust setae apically, 2 groups of 3–4 robust setae on medial face, inner margin lined with plumose slender setae; outer plates rounded distally, with distal and distomedial robust and slender setae; palps robust, 4 -articulate, distolateral margin of articles 1–2 with 2–3 robust setae. Peraeon: Gnathopod 1 (Fig. 4), coxa shield-shaped, with slender setae along ventral margin; basis long, expanded distally, with small robust setae on anterior and posterior margins; ischium and merus, strong robust setae present on posterior margins; carpus and propodus subequal in length, with robust setae on all surfaces, posterodistal margins of each article broadened into rounded lobes, with many minute palmate setae and many long thin robust setae of various sizes; dactylus strong, shorter than palm. Gnathopod 2 (Fig. 4), coxa quadrate, with small robust setae on ventral margin; basis long, abruptly expanded posteroproximally; propodus and dactylus enlarged, dactylus drawn out into a long, fine tip which fits in a groove on the propodus, inner margin with fine robust setae. Peraeopods 3–7 short, peraeopods 6–7 longer than peraeopods 3–5, peraeopod 7 slightly longer than peraeopod 6, all peraeopods cuspidactylate. Peraeopod 3, coxa quadrate, with robust setae on ventral margin, small notch present on anterodorsal corner, robust setae and small notches repeated on peraeopods 4–5 (Fig. 4); coxal gill sac-like. Similar notches on peraeopods 3–5 were absent in males from other populations of the same species. Peraeopod 4 (Fig. 4) shorter than peraeopod 3, coxa similar to that of peraeopod 3; dactylus with notch on inner surface (described by Bousfield and Poinar (1995) as a “pinched unguis”). Peraeopod 5, coxa dorsoventrally compressed, bilobed ventrally, anterior lobe largest; basis oval, slightly smaller robust setae on posterior margin than on anterior margin, larger robust setae on both margins of remaining articles. Peraeopod 6, coxa reduced, bilobed, anterior lobe small; basis and distal articles as in peraeopod 5, but longer. Peraeopod 7 (Fig. 4), coxa very small, bilobed, anterior lobe almost absent; basis subquadrate, posterior margin weakly serrate, robust seta at point of each serration; strong marginal robust setation on other articles, propodus slender, length approximately 7 times width; propodus with long, fine “comb” setae present in 4 clumps near distal tip, setae approximately half length of dactylus (Fig. 4, maximum length = 248 microns), first clump of small setae directed anteroventrally, second clump of long setae directed ventrally, third clump of short setae at posterodistal tip of propodus directed posteroventrally, fourth clump of a few small comb setae near distal group of robust setae on posterior margin of the propodus. Pleon: Pleopods slightly reduced, inner ramus slightly longer than outer, both rami slightly shorter than peduncle, peduncle of each pleopod with pair of hooked coupling robust setae on inner margin, fine marginal hairs present on outer margin; rami of 8–9 articles, each bearing pair of long, plumose setae. Pleopod 1 bears 6 simple robust setae along inner mid-line of peduncle, with only two each in pleopods 2–3. Urosome: Uropod 1, peduncle, inner and outer margins with 7 robust setae each; inner ramus approximately one-half length of peduncle, with 2 terminal and 2 marginal robust setae; outer ramus approximately three-quarters length of peduncle, with 4 terminal robust setae, without marginal robust setae. In all other specimens examined the inner and outer rami were subequal in length so the holotype inner ramus length is an artefact. Distolateral robust seta absent. Uropod 2, peduncle with two rows of robust setae, one row with 2 larger distal setae, plus 4 smaller setae, the second with 3 stout marginal robust setae; rami approximately equal in length, slightly shorter than peduncle, with 4–5 terminal and 3 marginal robust setae; inner ramus with 2 robust setae on lateral surface. Uropod 3 small, peduncle slightly longer than ramus, armed with 4 long and 2 short robust setae distally; ramus with 5 subequal terminal and 3 marginal robust setae. Telson (Fig. 3) heart-shaped, with mid-dorsal groove forming a notch distally; each lobe with 4 apical robust setae, 1 distal dorsolateral robust seta, 4 proximal dorsolateral robust setae (one is missing from right lobe). Allotype: with similar body colouration and epidermal pigment markings as the holotype. Sexually dimorphic differences include: Antenna 2, peduncle not quite as thick or long as in male; flagellum 12 -articulate. Gnathopod 1 (Fig. 4) without rounded posterior lobes on carpus and propodus; dactylus longer than palm. Gnathopod 2 (Fig. 4) basis widest medially, expanded anteriorly in deep, smooth convex curve; carpus and propodus with rounded posterior marginal lobe, with fine palmate setae; propodus and dactylus not enlarged. Oostegite on gnathopod 2 spatulate, exceeding length of the basis, with 22 long, thin, simple marginal setae; FIGURE 3. M. c. carpenteri n. subsp. Habitus drawing of male, 12 mm, Hagen’s Cove, Fl. Mouthparts and telson of male holotype, 11.5 mm body length, Tiger Tail Beach, Fl. (USNM 1218141). Uropods from ovigerous female allotype, 8.0mm from Tiger tail Beach (USNM 1218142). Scale bars all 37.5 µ, except LL = 18.8 µ, T = 225 µ and uropods = 500 µ. oostegites on peraeopods 3–5 are successively smaller, with setal numbers of 19, 16 and 10 respectively; peraeopod 5 oostegites are smallest, approximately equal in length to basis. Peraeopods 3–5 lack notch on anterodorsal corner of coxa. Peraeopod 7 (Fig. 4), propodus length approximately 6 times width, clusters of propodal “comb” setae absent. Etymology. The species name commemorates the marriage of Clare Wildish and Jamie Carpenter at Marco Island on 4 th March, 2004. Pronunciation: car pent air ii. Epidermal pigment patterns. The general body colour of live animals from the type locality was pale white, similar to the sand on which they live, with epidermal pigment markings which were bright red in colour. The markings occurred both on the dorsal and lateral parts of the body, but only the former are illustrated here (Fig. 5). Dorsal pigment patterns (DPP) of M. c. carpenteri n. subsp. from Tiger Tail Beach samples were found to be highly variable, with DPPs ranging from relatively heavily pigmented (Fig. 5 A) to nearly absent (Fig. 5 D). Individuals showing various stages of loss of DPP were present at the type locality as shown in Fig. 5. Even in the individuals with the most reduced DPP, mid-line blotches of epidermal pigment were present on the pleon (Fig. 5 D). There was no evidence of sexual dimorphism in DPPs; similar patterns were present in both sexes. In addition to Tiger Tail beach material, we examined the DPP’s of five different populations of M. c. carpenteri n. subsp., distant from the type locality, all of which occupied the same ecotope (supralittoral wrack) and differed from individuals at the type locality (see below). All of these populations had essentially similar DPPs and examples are shown in Fig. 6. The supralittoral wrack samples showed little intra-population variation and were more heavily pigmented than the most pigmented individuals from Tiger Tail Beach. A characteristic feature was the presence in the last peraeon segment of a U or W shape made by the epidermal pigments (incomplete in Fig. 5 A–D). Distribution. Northwestern Atlantic: Titusville to Ft. Lauderdale, Florida. Gulf of Mexico: Lower Florida Keys to South Padre Island, Texas.Published as part of Wildish, David J. & Lecroy, Sara E., 2014, Mexorchestia: a new genus of talitrid amphipod (Crustacea, Amphipoda, Talitridae) from the Gulf of Mexico and Caribbean Sea, with the description of a new species and two new subspecies, pp. 555-577 in Zootaxa 3856 (4) on pages 562-568, DOI: 10.11646/zootaxa.3856.4.5, http://zenodo.org/record/22856
Mexorchestia Wildish & Lecroy, 2014, n. gen.
No full textMexorchestia n. gen. “ Tethorchestia ”: LeCroy, 2011, pp. 757. Type species. Mexorchestia carpenteri carpenteri n. sp. and subsp. Component species. Mexorchestia carpenteri carpenteri n. sp. and subsp.; M. carpenteri raduloviciae n. sp. and subsp. Etymology. Refers to the Gulf of Mexico, where the new taxon was originally found, and to the genus Orchestia, to which it is related. Diagnosis. Eyes large, greater than one third head length; antenna 1, approximately one half length of antenna 2 peduncle, not extending beyond peduncle article 4; antenna 2 not sexually dimorphic, that of male slender, not incrassate, without ventral plate on peduncle article 3; upper lip without robust setae; mandible, left lacinia mobilis 4–5 dentate; maxilliped, palp 4 -articulate, article 2 with well-developed medial lobe, article 4 reduced; gnathopod 1 of male subchelate, palm well-developed, transverse, longer than dactyl; carpus and propodus, posterior margin with rounded lobe covered with palmate setae; gnathopod 1 of female parachelate, palm poorly developed, shorter than dactyl; gnathopod 2 of male subchelate, basis stout, without tubercles on anterior margin, merus and carpus free, unfused, dactyl distally attenuate, extending two thirds length of propodus, without tooth on cutting edge; gnathopod 2 of female, oostegite spatulate, with 15–35 long, simple marginal setae, basis subovate, expanded medially, anterior margin evenly convex; peraeopods 3–7 cuspidactylate; peraeopods 5–7 without slender setae lining anterior margin of dactyl; peraeopod 7 weakly sexually dimorphic, merus and carpus of male not or very weakly incrassate, propodus of male with 2–4 tufts of long, stiff, slightly medial slender setae on anterodistal and distal margins; pleon segments 1–3 without dorsal spines; epimera 1–3 without vertical slits; pleopods 1–3 slightly reduced, peduncles slender; uropods 1–2, rami without apical spade-like robust setae; uropod 1 not sexually dimorphic, peduncle without well-developed dorsolateral robust seta distally, outer ramus without marginal robust setae; uropod 2, outer ramus subequal to inner in length; uropod 3 well-developed, ramus shorter than peduncle, at least twice as long as deep, cylindrical, not laterally compressed, tapering distally, tip subacute; telson apically notched, with 8–10 robust setae per lobe, distinctly shorter than uropod 3, not extending beyond distal end of peduncle. Remarks. Mexorchestia belongs to the cuspidactylate group of non-substrate modifying (sensu MacIntyre 1963) beachfleas of Bousfield (1982, 1984). This group also includes the genera Australorchestia Serejo & Lowry, 2008; Chroestia Marsden & Fenwick, 1984; Floresorchestia Bousfield, 1984; Notorchestia Serejo & Lowry, 2008; Orchestia Leach, 1814; Paciforchestia Bousfield, 1982; Platorchestia Bousfield, 1982; Tethorchestia Bousfield, 1984; Tongorchestia Lowry & Bopiah, 2013; Transorchestia Bousfield, 1982, Traskorchestia Bousfield, 1982 and Vallorchestia Lowry 2012. Mexorchestia can be distinguished from Australorchestia, Notorchestia, Orchestia, Paciforchestia, Tongorchestia, Transorchestia and Traskorchestia by the absence of marginal robust setae on the outer ramus of uropod 1 and from Chroestia, Tethorchestia and Vallorchestia by the lack of a large distolateral robust seta on the peduncle of uropod 1. The remaining genera (Floresorchestia and Platorchestia) are distinguished from Mexorchestia by the shape of the basis of the female second gnathopod. In the first two genera, the basis is inverted pyriform in shape, with the broadest expansion occurring proximally; in Mexorchestia, the basis is evenly expanded anteriorly, with the broadest expansion occurring medially. Mexorchestia is close to the genus Tethorchestia and Bousfield (1984) originally considered Mexorchestia carpenteri n. sp. to be a member of that genus (Bousfield 1984, as Tethorchestia sp. B). Both genera have the distinctive, apparently unique, tufts of stiff, elongate, anterodistal and distal slender setae on the propodus of peraeopod 7 in the male, although the number of setal groups differs between the two (Mexorchestia has 2–4 groups; Tethorchestia has 5–6 groups). However, Mexorchestia differs from Tethorchestia in the subovate basis of gnathopod 2 in the female (inverted pyriform in Tethorchestia), the shape of the oostegites (strap-like in Tethorchestia; spatulate in Mexorchestia), the lack of a well-developed distolateral robust seta on the peduncle of uropod 1 (present in Tethorchestia) and the presence of a strong dorsal pigmentation pattern (pattern absent or obscure in Tethorchestia). Additional support for the new genus is provided by a CO 1 -based phylogeny of North Atlantic and Gulf of Mexico regional talitrids (Radulovici 2012).Published as part of Wildish, David J. & Lecroy, Sara E., 2014, Mexorchestia: a new genus of talitrid amphipod (Crustacea, Amphipoda, Talitridae) from the Gulf of Mexico and Caribbean Sea, with the description of a new species and two new subspecies, pp. 555-577 in Zootaxa 3856 (4) on pages 561-562, DOI: 10.11646/zootaxa.3856.4.5, http://zenodo.org/record/22856
Mexorchestia carpenteri subsp. raduloviciae Wildish & Lecroy, 2014, n. subsp.
No full textMexorchestia carpenteri raduloviciae n. subsp. (Figures 7, 8) Material examined. Holotype: Male, 10.0 mm, near Black Bird Resort Center, Turneffe Island, Belize, 17 ° 18 ′ 39 ″ N 87 ° 48 ′ 0 4 ′′ W, J. Hunt, 16 April 2010, collected from wrack consisting of macroalgae and mangrove litter, USNM 1218150. Slide preparation USNM 1218150. Allotype: Female, 6.5 mm, same data as above, slide preparation USNM 1218151. Paratypes: 11 specimens, same data as above, collected 18 April 2010, USNM 1218152. 19 specimens, Lighthouse Reef, Belize, 17 ° 17 ′ 30 ′′ N, 87 ° 31 ′ 10 ′′ W, J. Hunt, 20 April 2010, on a white sand upper shore in seagrass wrack, USNM 1218153. 10 specimens, Lighthouse Reef, Belize, same position, 18 April 2010, CMNC- 2012 -0021. Other samples were collected for mDNA studies from Cayo Norte (Chinchorro Bank), 18.747 ° N, 87.3038 ° W; Mahahual, 18.712 °N, 87.7102 ° W; Punta Herrero, 18.324 ° N 87.4629 ° W and Xcalak, 18.272 °N 87.8346 ° W, all in Quintana Roo Province, Mexico; A. Radulovici. The samples from Mexico are in the possession of A. Radulovici. Maximum body length (N = 29): males 11 mm, females 7 mm. Diagnosis. Small talitrids (<11 mm). Antenna 2, flagellum with 18–21 articles in adult males longer than 9 mm; ovigerous female antenna 2 with 15–19 articles, oostegite 2 with 15–19 marginal setae; telson, each lobe with 2 distal dorsolateral robust setae; dorsal pigment pattern in both sexes diffuse on cephalon (may be absent); linear, club-shaped or absent on mid-line of pleon. Description. Based on male holotype, 10 mm. Cephalon (Fig. 7): Cephalon and antennae similar to those of M. c. carpenteri n. subsp. Antenna 1, flagellum 5 -articulate; antenna 2, flagellum 20 -articulate. Mouthparts: Similar to those of M. c. carpenteri n. subsp., with a 4 – 5 dentate lacinia mobilis in the left mandible. It was noted that the fifth tooth is very small and difficult to see in some specimens. Maxilla 1, inner plates with two terminal, plumose setae. Peraeon: Gnathopod 1 as in M. c. carpenteri n. subsp., except dactyl slightly longer; thin robust setae at the base of posterior rounded lobes on carpus and propodus shorter. Pleon: Pleopods 1–3 as in M. c. carpenteri n. subsp. Urosome (Fig. 7): Uropod 1, inner ramus with 4 marginal robust setae. Uropods 2–3 similar to those of M. c. carpenteri n. subsp. Telson, each lobe with 2 distal dorsolateral robust setae, otherwise similar to that of M. c. carpenteri n. subsp. Female. Based on 7 mm specimen from Turneffe Island, Belize. With similar dorsal pigment patterns as the male. Oostegite setal numbers (P 2 –P 5) of: 15, 14, 11, 8. Sexual dimorphism as in M. c. carpenteri n. subsp. Etymology. The subspecific name is in honour of Dr. Adriana Radulovici, who first discovered this taxon in Mexico. The pronunciation is: rad ool ov ich ee ay. Epidermal pigment patterns. The freshly collected 10 mm male specimen preserved in dilute formalin was pale cream in background colour, with dorsal pigment markings deep red in colour. On transferring to isopropanol, the red pigment rapidly leached out. Just as in the nominate subspecies of the new genus, the DPP of M. c. raduloviciae n. subsp, was highly variable. The most pigmented morphs were from Turneffe Island (Figs 8 A, B) with those from Lighthouse Reef showing DPP loss (Fig 8 C, D) where the substrate was a white sand beach. The W shape of the epidermal pigments of the last peraeon segment (Fig. 6 A–B) was lost in the more reduced DPP individuals (Figs 8 C, D). Mid-line epidermal pigments of the pleon occur in only the most pigmented individuals (Fig. 8 A, B) and not in others (Fig 8 C, D). Note that the range of samples examined was limited (two populations from Belize), and we were unable to investigate pigment patterns of the samples from Mexico, due to their preservation in ethanol which leaches out the epidermal pigments. Distribution. Caribbean Sea: Quintana Roo, Yucatan Peninsula, Mexico to Turneffe Island, Belize.Published as part of Wildish, David J. & Lecroy, Sara E., 2014, Mexorchestia: a new genus of talitrid amphipod (Crustacea, Amphipoda, Talitridae) from the Gulf of Mexico and Caribbean Sea, with the description of a new species and two new subspecies, pp. 555-577 in Zootaxa 3856 (4) on pages 568-569, DOI: 10.11646/zootaxa.3856.4.5, http://zenodo.org/record/22856
Colomastix thomasi LECROY, 2009, sp. nov.
No full text<i>Colomastix thomasi</i> sp. nov. <p>(Figs 11, 12)</p> <p> <b>Type material.</b> Holotype, male, 2.1 mm, AM P78989, south of Lizard Head, Lizard Island (14°41’S 145°27’E), coral rubble, 2 m, J.D. Thomas, 29 January 1989 (JDT / LIZ 14). Paratypes: 6 males, 1 female, AM P79272, same data; 1 male, AM P78990, off southern tip of island, Lizard Island, coral rubble and algal turf on patch reef, 1 m, J.D. Thomas, 23 January 1989 (JDT / LIZ 3); 5 males, AM P79273, beach at Lizard Head, Lizard Island, coral rubble from rubble beach, J. D. Thomas, 31 January 1989 (JDT / LIZ 15); 2 males, 1 female, AM P79274, south-west of Lizard Head, Lizard Island, algae-covered rubble on carbonate pavement with varying amounts of carbonate sand, 1.5 m, J.D. Thomas, 2 February 1989 (JDT / LIZ 17); 2 males, GCRL 2875, off Lizard Head, Lizard Island, small pieces of coral rubble on sand bottom, J.D. Thomas, 2 February 1989 (JDT / LIZ 19).</p> <p> <b>Additional material examined.</b> 3 juveniles, AM P78988 (QLD 1).</p> <p> <b>Type locality.</b> South of Lizard Head, Lizard Island, Queensland, Australia (14°41’S 145°27’E).</p> <p> <b>Etymology.</b> Named for James D. Thomas, who collected and made available for study all of the adult material of this species.</p> <p> <b>Description.</b> Based on holotype, male, 2.1 mm, AM P78989 and paratype series of 2 males, AM P79274.</p> <p> <b>Head.</b> <i>Head</i> as long as deep, subequal in length to pereon segments 1 and 2 combined; rostrum narrowly rounded; interantennal plate with anterodorsal and anteroventral angles extending forward subequally, anterior margin straight to slightly concave, without serrations, without ventral teeth. <i>Antennae 1–2</i> marginal robust setae short. <i>Antenna 1</i> peduncle article 1, dorsomedial margin without robust setae. <i>Antenna 2</i> peduncle articles 3–5, ventrolateral margin with small, triangular robust setae; peduncle article 3, distomedial angle with 2 robust setae, without slender setae or process, dorsomedial margin without robust setae, ventromedial surface without robust setae; peduncle article 5, dorsal margin without stubby robust setae. <i>Mouthparts</i> other than maxilliped greatly reduced or vestigial. <i>Maxilliped</i> inner plates completely fused, basal shell not expanded to form a ventral keel.</p> <p> <b>Pereon.</b> <i>Coxa 1</i> anterior margin convex, anteroventral angle rounded. <i>Coxae 1–4</i> without small anteroventral cusp. <i>Coxal gills</i> 2–5 subequal in size, gill 6 subequal to gill 5. <i>Gnathopod 1</i> vestigial, exact morphology individually variable; propodus without setae. <i>Gnathopod 2</i> basis broadly expanded distally, anterior margin entire, without anterodistal notch, without anterodistal process; ischium with inner anterodistal lobe not expanded; carpus much shorter than propodus, inner ventral surface with patch of setae, setae short, very fine; propodus greatly enlarged, inner ventral surface without patch of setae, palm deeply excavate, with 3 dissimilar, unequally spaced processes, palmar angle with 1 elongate subtriangular process, apical margin of process entire, middle process very small, rounded, process at dactylar hinge broad, subtriangular; dactylus, insertion on propodus apical, with large process on posterior margin, tip lanceolate, subacute. <i>Pereopods 3–4</i> basis not produced anterodistally. <i>Pereopods 3–7</i> basis unexpanded. <i>Pereopod 7</i> propodus, anterior margin without setae.</p> <p> <b>Pleon.</b> <i>Pleopods 1–3</i> inner ramus with 3 articles, outer ramus with 4 articles. <i>Pleopod 2</i> peduncle, anteromedial surface with 3 slender setae. <i>Uropod 1</i> inner ramus modified, strongly falcate, not expanded proximally, dorsal margin with large, simple, subapical slender seta, tip narrowing abruptly distal to seta, pleated, subtruncate; outer ramus one half length of inner ramus, tip serrate, subtruncate. <i>Uropod 2</i> both rami, ventral margin lacking setae. <i>Uropod 3</i> peduncle twice as long as deep; inner ramus expanded proximally, approximately one-third longer than outer ramus. <i>Telson</i> broadly subtriangular, dorsal surface flat, tip constricted, narrowly rounded, without lobes or processes, with 2 subapical minute slender setae.</p> <p> <b>Female</b> (sexually dimorphic characters). Based on paratype, female, AM P79274. <i>Head</i> subequal in length to pereon segment 1 and half of pereon segment 2 combined. <i>Antenna</i> 2 peduncle article 3, distomedial angle with 1 robust seta. <i>Mouthparts</i> other than maxilliped moderately reduced. <i>Oostegite 2</i> narrowly subovate (length:width ratio 3:1 or greater), approximately one-third longer than basis of gnathopod 2. <i>Gnathopod 1</i> elongate, slender; propodus with simple apical setae. <i>Gnathopod 2</i> basis weakly expanded distally; carpus subequal to propodus in length, inner ventral surface with patch of setae, setae elongate, very fine; propodus unenlarged, inner ventral surface with patch of setae, setae elongate, very fine, palm not excavate, without teeth or processes; dactylus without process on posterior margin, tip pleated, subtruncate. <i>Pleopod 2</i> peduncle, anteromedial surface without slender setae. <i>Uropod 1</i> inner ramus unmodified, lanceolate; outer ramus three-fourths length of inner ramus, tip lanceolate, subacute. <i>Uropod</i> 3 inner ramus lanceolate, ventral margin lacking setae.</p> <p> <b>Adult body length.</b> 1.5–2.1 mm. There appears to be little difference in size between males and females in this species.</p> <p> <b>Colour in life.</b> Unknown.</p> <p> <b>Host.</b> Unidentified sponge.</p> <p> <b>Habitat.</b> Coral rubble and algal turf on patch reefs, often over sand bottoms.</p> <p> <b>Depth range.</b> 1–18 m.</p> <p> <b>Remarks.</b> <i>Colomastix thomasi</i> <b>sp. nov.</b> is a tiny, very distinctive species that has, thus far, only been found off Lizard Head and in Watsons Bay on Lizard Island. The morphology of the outer ramus of uropod 1 in the male of <i>C. thomasi</i> <b>sp. nov.</b>, with its subtruncate, serrate tip, as well as the unique, complex apical morphology of the inner ramus of that appendage, distinguish this species from all other known species of the genus. The cheliform gnathopod 2 of the male is also unusual, resembling that of only three other species (<i>C. gibbosa</i>, an Atlantic species, <i>C. inaequicornis</i> Ledoyer, 1979 from Madagascar and <i>C. minuta</i> Müller, 1992 from the Society Islands). All three of these species have the large process or "thumb" at the palmar angle of the propodus and the former two species also have the very large process on the posterior margin of the dactylus. However, <i>C. gibbosa</i> has a bulbous tip on the inner ramus of uropod 1, <i>C. inaequicornis</i> has an elongate, unreduced gnathopod 1 and <i>C. minuta</i> has a bifurcate telson tip.</p> <p> The female of <i>C. thomasi</i> <b>sp. nov.</b> has a distinctive pleated tip on the dactylus of gnathopod 2, a feature which, as stated in the remarks for <i>C. plumosa</i>, it shares only with C. <i>plumosa</i>, <i>C. semiplumosa</i>, <i>C. azumai</i> and <i>C. littoralis</i>. It can be distinguished from the first two of these species by the lack of any densely setose rami on uropods 2 or 3 and from the latter two species by the broadly rounded anteroventral angle of coxa 2, the lack of setae on the anterior margins of the propodi on pereopods 5–7 (unknown for female <i>C. azumai</i> or C. <i>littoralis</i>, but setae are present in the males of these species and this is not usually a sexually dimorphic character in <i>Colomastix</i>) and the unequal rami of uropod 3. It differs from all four of these species in having only 3 articles rather than 4 on the inner ramus of pleopods 1–3.</p> <p> <b>Distribution.</b> <i>Australia</i>. Queensland: Lizard Island (current study).</p>Published as part of <i>LECROY, SARA E., 2009, Colomastigidae *, pp. 348-372 in Zootaxa 2260 (1)</i> on pages 367-371, DOI: 10.11646/zootaxa.2260.1.17, <a href="http://zenodo.org/record/10093425">http://zenodo.org/record/10093425</a>
Colomastix dentipalma LECROY, 2009, sp. nov.
No full text<i>Colomastix dentipalma</i> sp. nov. <p>(Figs 1, 2, Pl. 2E)</p> <p> <b>Type material.</b> Holotype, male, 4.9 mm, AM P78981, Blue Lagoon Bommie, Lizard Island (14°41.24'S 145°27.93'E), unidentified sponge, 8 m, K. Klebba, 4 March 2005 (QLD 1804). Paratypes: 1 male, AM P78982, North Point, Lizard Island, rubble at base of rock cliff, 12 m, J. D. Thomas, 28 January, 1989 (JDT / LIZ 13); 1 male, 1 female, AM P71339 (QLD 1804), same data as holotype; 4 males, 7 females, AM P71429 (QLD 1804), same data as holotype.</p> <p> <b>Additional material examined.</b> 1 male, 1 female, AM P27022 (QLD 2017).</p> <p> <b>Type locality.</b> Blue Lagoon Bommie, Lizard Island, Queensland, Australia (14°41.24'S 145°27.93'E).</p> <p> <b>Etymology.</b> From the Latin ' <i>dentis</i> ', meaning 'tooth', and ' <i>palma</i> ', meaning 'hand', referring to the acute processes at the palmar angle of the propodus on gnathopod 2 of the female.</p> <p> <b>Description.</b> Based on holotype male, 4.9 mm, AM P78981 and 4 paratype males, AM P71429.</p> <p> <b>Head.</b> <i>Head</i> as long as deep, subequal in length to pereon segment 1 and half of pereon segment 2 combined; rostrum subacute; interantennal plate with anteroventral angle extending far beyond anterodorsal angle, anterior margin straight to slightly concave, weakly serrate, with 2 ventral teeth. <i>Antennae 1–2</i>, marginal robust setae elongate. <i>Antenna 1</i> peduncle article 1, dorsomedial margin with 3–5 robust setae. <i>Antenna 2</i> peduncle articles 3–5, ventrolateral margin without small, triangular robust setae; peduncle article 3, distomedial angle with 1 robust seta, without slender setae or process, dorsomedial margin with 2 robust setae, ventromedial surface with 2 robust setae; peduncle article 5, dorsal margin without stubby robust setae. <i>Mouthparts</i> other than maxilliped moderately reduced. <i>Maxilliped</i> inner plates completely fused, basal shell expanded to form a ventral keel, keel distally flattened.</p> <p> <b>Pereon.</b> <i>Coxa 1</i> anterior margin strongly concave, anteroventral angle narrowly produced. <i>Coxae 1–4</i> with small anteroventral cusp. <i>Coxal gills</i> 2–5 gradually increasing in size, gill 6 smaller than gill 5. <i>Gnathopod 1</i> elongate, slender; propodus with pectinate apical setae. <i>Gnathopod 2</i> basis broadly expanded distally, anterior margin entire, with anterodistal notch, without anterodistal process; ischium with inner anterodistal lobe not expanded; carpus much shorter than propodus, inner ventral surface without patch of setae; propodus greatly enlarged, inner ventral surface with patch of setae, setae elongate, slender, palm not excavate, with 3 dissimilar, unequally spaced processes, palmar angle with 2 processes, proximal process distinctly larger than middle process, subtruncate, apical margin minutely serrate, middle process small, subacute, process at dactylar hinge broad, subtriangular; dactylus, insertion on propodus apical, with small process on posterior margin, tip lanceolate, subacute. <i>Pereopods 3–4</i> basis produced anterodistally to form rounded lobe. <i>Pereopods 3–7</i> basis slightly expanded. <i>Pereopod 7</i> propodus, anterior margin with 3–4 robust setae.</p> <p> <b>Pleon.</b> <i>Pleopods 1–3</i> inner ramus with 4 articles, outer ramus with 5 articles. <i>Pleopod 2</i>, peduncle, anteromedial surface with 5 slender setae. <i>Uropod 1</i> inner ramus modified, not strongly falcate, not expanded proximally, ventral margin straight, tip minutely bifurcate, dorsal branch of bifurcation longer than ventral branch, both branches straight; outer ramus slightly shorter than inner ramus, tip lanceolate, subacute. <i>Uropod 2</i> both rami, ventral margin lacking setae. <i>Uropod 3</i> peduncle less than twice as long as deep; inner ramus blade-like, approximately twice length of outer ramus, medial surface with proximal, curved diagonal ridge, ridge lined with minute robust setae. <i>Telson</i> narrowly subtriangular, dorsal surface flat, tip subtriangular, without lobes or processes, with 2 apical elongate slender setae.</p> <p> <b>Female</b> (sexually dimorphic characters). Based on 7 paratype females, AM P71429. <i>Oostegite 2</i> subovate (length:width ratio approximately 2:1), approximately twice as long as basis of gnathopod 2. <i>Gnathopod 2</i>, basis linear, unexpanded distally, without anterodistal notch; propodus slightly enlarged, palm with 2 processes, processes subequal in size, margins serrate distally; dactylus without process on posterior margin. <i>Pereopods 3–4</i> basis not produced anterodistally. <i>Pleopod 2</i> peduncle, anteromedial surface without slender setae. <i>Uropod 1</i>, inner ramus unmodified, lanceolate.</p> <p> <b>Adult body length.</b> 3.4–5.2 mm. Males attain slightly larger sizes than females.</p> <p> <b>Colour in life.</b> Eyes red. Antennae 1–2 banded with rose pink and pale grey or white; body and pereopods with a faint rose pink wash over translucent grey. Eggs lime green.</p> <p> <b>Host.</b> Unknown.</p> <p> <b>Habitat.</b> Sponges, coral rubble.</p> <p> <b>Depth range.</b> 8–13 m.</p> <p> <b>Remarks.</b> <i>Colomastix dentipalma</i> <b>sp. nov.</b> belongs to the group of species with an elongate, blade-like inner ramus on uropod 3 in both sexes. This group also includes <i>C. brazieri</i> from south-eastern Australia; <i>C. magnirama</i> Hurley, 1954 from New Zealand; <i>C. lunalilo</i> J.L. Barnard, 1970 from Hawaii; <i>C. japonica</i> Bulycheva, 1955 from the Sea of Japan (Russia); and <i>C. laminosa</i> Lyons & Myers, 1990 from the Red Sea. It differs from all of the above species by having a moderately enlarged propodus with palmar ornamentation on gnathopod 2 of the female and very elongate apical slender setae on the telson in both sexes. It also differs from all except <i>C. japonica</i> by the presence of a large anterodistal notch in the basis of gnathopod 2 in the male. <i>Colomastix dentipalma</i> <b>sp. nov.</b> can be further distinguished from <i>C. japonica</i>, which it closely resembles, by the presence of a second ventral tooth and a less concave anterior margin on the interantennal plate and by the distally expanded basis and minutely serrate palmar process on gnathopod 2 of the male. In addition, the modification of the tip of the inner ramus of the male uropod 1 differs between the two species.</p> <p> <b>Distribution.</b> <i>Australia</i>: Queensland: Lizard and Heron Islands (current study).</p>Published as part of <i>LECROY, SARA E., 2009, Colomastigidae *, pp. 348-372 in Zootaxa 2260 (1)</i> on pages 349-352, DOI: 10.11646/zootaxa.2260.1.17, <a href="http://zenodo.org/record/10093425">http://zenodo.org/record/10093425</a>
FIGURE 5. Colomastix lunalilo J.L. Barnard, 1970 in Colomastigidae*
No full textFIGURE 5. Colomastix lunalilo J.L. Barnard, 1970, male, 3.4 mm, female, 3.0 mm, AM P70967, 200 m north of Bird Islet, Lizard Island, Great Barrier Reef.Published as part of <i>LECROY, SARA E., 2009, Colomastigidae*, pp. 348-372 in Zootaxa 2260 (1)</i> on page 358, DOI: 10.11646/zootaxa.2260.1.17, <a href="http://zenodo.org/record/10093425">http://zenodo.org/record/10093425</a>
FIGURE 6. Colomastix lunalilo J.L. Barnard, 1970 in Colomastigidae*
No full textFIGURE 6. Colomastix lunalilo J.L. Barnard, 1970, male, 3.4 mm, female, 3.0 mm, AM P70967, 200 m north of Bird Islet, Lizard Island, Great Barrier Reef.Published as part of <i>LECROY, SARA E., 2009, Colomastigidae*, pp. 348-372 in Zootaxa 2260 (1)</i> on page 359, DOI: 10.11646/zootaxa.2260.1.17, <a href="http://zenodo.org/record/10093425">http://zenodo.org/record/10093425</a>
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