43,271 research outputs found
Talorchestia morinoi Othman & Azman 2007
No full textTalorchestia morinoi Othman & Azman, 2007 Talorchestia morinoi Othman & Azman, 2007: 60, figs 1–4. Type material. Holotype, male, 9.6 mm, UKMMZ-1154. Paratypes: female, 10.2 mm, UKMMZ-1155; 2 males and 2 females AM P.72698); 15 males, 15 females UKMZ-1156. Type locality. Air Batang beach, Tioman Island, east coast Peninsular Malaysia (2°50.483'N 104°9.566'E). Habitat. Living among macroalgae in the supralittoral zone. Diagnostic description. Based on Othman & Azman, 2007: 60, figs 1–4. Antenna 2 short (shorter than first 3 pereonites) . Gnathopod 1 carpus 1.6 × as long as propodus, about 3.1 × as long as broad; propodus tapering. Gnathopod 2 merus and carpus appear to be fused; propodus about 1.8 × as long as wide, palm reaching about 50% along posterior margin, without protuberance near dactylar hinge. Epimeron 1 with 4 robust setae along ventral margin. Epimeron 3 with small subacute tooth . Uropod 2 inner ramus subequal in length to outer ramus. Uropod 3 ramus 2.7 × as long as broad. Telson with about 10 setae per lobe . Remarks. Talorchestia morinoi belongs to the group of nine species (T. brucei, T. dampieri, T. dili, T. gracilis, T. martensii, T. morinoi, T. seringat, T. sipadan and T. qeshm) without a rounded protuberance near the dactylar hinge on the palm of gnathopod 2. Talorchestia morinoi is similar to T. qeshm from the Persian Gulf. Both species have at least 10 robust setae per lobe on the telson and the dactylus of male gnathopod 2 reaching about halfway down the posterior margin of the propodus. But T. morinoi has a short second antenna (not reaching to the third pereonite, more than half body length in T. qeshm), the carpus of male gnathopod 1 is about 3 × as long as broad (2.5 × in T. qeshm), the merus and carpus of male gnathopod 2 appear to be fused in T. morinoi (although the carpus is small in T. qeshm it is distinct), the posteroventral corner of epimeron 3 has a small subacute tooth (large in T. qeshm) and the ramus of uropod 3 is free in T. morinoi (partially fused to the peduncle in T. qeshm). Distribution. Malaysia. Tioman Island, South China Sea (Othman & Azman 2007).Published as part of Azman, B. A. R., 2017, The talitrid amphipod genus Talorchestia from the South China Sea to the Indonesian Archipelago (Crustacea, Senticaudata), pp. 401-434 in Zootaxa 4319 (3) on pages 417-418, DOI: 10.11646/zootaxa.4319.3.1, http://zenodo.org/record/89224
Gbroidea dingaalana Lowry & Azman 2008
No full text<i>Gbroidea dingaalana</i> Lowry & Azman, 2008 <p>(Figs 4, 5, Pl. 2H)</p> <p> <i>Gbroidea dingaalana</i> Lowry & Azman, 2008: 61, figs 2–4.</p> <p> <b>Type locality.</b> Off Watsons Beach, Lizard Island, Queensland, Australia (14º40’S 145º28’E).</p> <p>Material examined. Holotype female, 2.5 mm, AM P76155 (QLD 2010). Paratypes: 4 females, AM P38473 (QLD 2010); 2 females, AM P38471(QLD 2011); 4 females, AM P38472 (QLD 2011).</p> <p> <b>Description</b>. Based on holotype female, 2.5 mm, AM P76155.</p> <p> <b>Head.</b> <i>Head</i> lateral cephalic lobes apically acute. <i>Eyes</i> large, irregularly round with deep brown core. <i>Antenna 1</i> flagellum with about 4 articles each with long aesthetascs distally; accessory flagellum 1 articulate. <i>Antenna 2</i> slightly shorter than antenna 1, slender; flagellum with 4 articles, apex of terminal segment with few long setae. <i>Lower lip</i> outer lobes apically produced with dense short apical setae. <i>Maxilliped</i> inner plate not broad, apically truncate; outer plate extending beyond inner plate, apex with one small robust seta and several simple setae; palp 4-articulate, article 2 wider than long, dactylus apically falcate.</p> <p> <b>Pereon.</b> <i>Gnathopod 1</i> coxa vestigial; basis robust, anterior margin with 4 medium length setae, posterior margin with 1 seta posterodistally; merus not elongated, posterior margin with two setae; carpus distally expanded, anterodistally rounded with a pair of setae, posterior margin slightly produced with 3 posterodistal setae; propodus subrectangular, anterior margin with 3 setae, tooth-like process anterodistally, posterior margin straight; dactylus falcate. <i>Gnathopod 2</i> basis robust, anterior margin lined with medium length setae, posterior margin without setae; merus posterodistal margin with long setae; carpus subtriangular, subequal in length with propodus, anterior margin without setae, anterodistal margin with two setae. <i>Pereopod 3</i> coxa anterior margin expanded, rounded, posterior margin slightly concave; basis anterior margin densely setose; merus gradually expanding anterodistally. <i>Pereopod 4</i> coxa enlarged, shield-like, anterior margin almost straight, posterior margin with well developed rounded posterodistal margin; basis anterior margin straight, posterior margin slightly concave. <i>Pereopod 5</i> coxa anterior and posterior margin rounded; basis slender, rectolinear; merus posterodistal margin slightly produced. <i>Pereopod 7</i> shorter than pereopod 6; coxa anteroventral margin produced, expanded; basis anterior margin straight, with 2 setae along margin, posterior margin expanded, with distal lobe extending beyond ischium.</p> <p> <b>Pleon.</b> <i>Epimeron 3</i> posterodistal margin rounded. <i>Uropod 1</i> rami subequal, peduncle slightly shorter than rami, both margins of both rami pectinate. <i>Uropod 2</i> biramous, inner ramus shorter than outer ramus, both margins of both rami pectinate. <i>Uropod 3</i> biramous; peduncle subequal in length of inner ramus; inner ramus shorter than outer, outer margins pectinate. <i>Telson</i> entire.</p> <p> <b>Male</b> (sexually dimorphic characters). Unknown.</p> <p> <b>Habitat.</b> Living in association with the unstalked crinoids, <i>Comathus briareus</i>, <i>Comatula rotalaria</i> and <i>Zygometra microdiscus</i>.</p> <p> <b>Remarks</b>. As Lowry & Azman (2008) pointed out, <i>Gbroidea dingaalana</i> has been observed on three crinoid species: <i>Comathus briareus</i>, <i>Comatula rotalaria</i> and <i>Zygometra microdiscus</i>. The weakly developed mouthparts of <i>G. dingaalana</i> indicate that it is probably feeding on soft tissue, possibly epidermal tissue from the crinoid. This relationship appears to be very similar to that mentioned by Vader (1978) and Comely & Ansell (1988) for the uristid amphipod, <i>Euonyx chelatus</i>, which is an epiparasite of the regular sea urchin, <i>Echinus esculentus.</i></p> <p> Morphologically <i>Gbroidea dingaalana</i> appears to be most closely related to the genera <i>Cyproidea</i> and <i>Mokuoloe</i> by having similar shape and embellishment especially the rectolinear basis of pereopod 5 to 6, however both of the genera differ from the present species by having subchelate gnathopod 1. Ultimately <i>Gbroidea dingaalana</i> has no agreement with any other species shown in its unique association with the three crinoid species, apart from that it is easily distinguished by the, (1) absence of molar, (2) gnathopod 1-2 simple, (3) pereopod 5-6 basis rectolinear, (4) urosomite 1 elongate, without dorsal keel, (5) urosomite 3 not projecting over telson, (6) telson laminar, shorter than apex of uropod 3 rami.</p> <p> <b>Distribution</b>. <i>Australia</i>. Queensland: Lizard Island (Lowry & Azman 2008).</p>Published as part of <i>Azman, B. A. R., 2009, Cyproideidae *, pp. 380-392 in Zootaxa 2260 (1)</i> on pages 385-388, DOI: 10.11646/zootaxa.2260.1.19, <a href="http://zenodo.org/record/5323740">http://zenodo.org/record/5323740</a>
FIGURE 4 in The talitrid amphipod genus Talorchestia from the South China Sea to the Indonesian Archipelago (Crustacea, Senticaudata)
No full textFIGURE 4. Talorchestia bunaken, holotype, male, 10.1 mm, UKMMZ-1404, Bunaken Island, Northern Sulawesi, Indonesia. Scale lines for U1, U2, T represent 0.1 mm, remainder represent 0.5 mm.Published as part of Azman, B. A. R., 2017, The talitrid amphipod genus Talorchestia from the South China Sea to the Indonesian Archipelago (Crustacea, Senticaudata), pp. 401-434 in Zootaxa 4319 (3) on page 407, DOI: 10.11646/zootaxa.4319.3.1, http://zenodo.org/record/89224
Amphilochus justi Azman, 2009, sp. nov.
No full text<i>Amphilochus justi</i> sp. nov. <p>(Figs 1, 2)</p> <p> <b>Type material.</b> Holotype, female, 2.6 mm, AM P70575 (in slides), 200 m off Research Beach, Lizard Island (14°40.83’S 145°26.75’E), fine biogenic sand, patches of reef and sand, 2.5 m, J. Just, 23 February 2005 (QLD 1625).</p> <p> <b>Type locality.</b> Off Research Beach, Lizard Island, Queensland, Australia (14°40.83’S 145°26.75’E).</p> <p> <b>Etymology.</b> The species is dedicated to Dr Jean Just from the Museum of Tropical Queensland, who collected these animals.</p> <p> <b>Description</b>. Based on holotype, female, 2.6 mm, AM P70575.</p> <p> <b>Head.</b> <i>Head</i> lateral cephalic lobes apically round; eyes irregularly round with black centre bordered with numerous opaque ommatidia. <i>Antenna 1</i> flagellum with about 5 articles, distoventral corner of last three articles with several elongate and flattened setae; accessory flagellum lacking. <i>Antenna 2</i> longer than Antenna 1; flagellum with 5 articles. <i>Upper lip</i> bilobed, asymmetric, densely pubescent apically. <i>Lower Lip</i> each lobe of outer plate subtriangular, shoulders densely pubescent, produced inward with bifid tooth. <i>Mandible</i> molar conical; palp with 3 articles of length ratios 6:13:16, article 3 apically attenuated. <i>Maxilla 1</i> outer plate with several large teeth; palp biarticulate, extending far beyond outer plate, apical margin with several large teeth. <i>Maxilla 2</i> inner plate with medial row of submarginal setae; outer plate longer than inner, with several terminal setae. <i>Maxilliped</i> inner plate missing; palp article 3 longer than wide, dactylus without unguis.</p> <p> <b>Pereon.</b> <i>Gnathopod 1</i> coxa anterodistally rounded; basis slender, anterior and posterior margin without setae, posterodistal margin with seta; merus with 2 distal robust setae; carpus with robust setae on posterior lobe; propodus anterior margin with few long setae, anterodistally with 2 short setae, palm transverse lined with slender setae and defined by three robust setae; dactylus inner margin serrate. <i>Gnathopod 2</i> basis anterior without seta, with flange, posterodistal margin with robust seta; carpus with elongate posterior lobe extending edge of palm, inner margin of lobe with two robust setae, distal part with three robust setae; propodus distally expanded, palm transverse, serrate, lined with slender setae, posterodistally with 2 short robust setae; dactylus inner margin serrate. <i>Pereopod 3</i> coxa longer than wide; basis without setae; dactylus attenuate. <i>Pereopod 4</i> coxa large, quadrate; dactylus attenuate. <i>Pereopod 5</i> basis expanded, anterior margin with 4 short robust setae, posterior margin with short fine setae; dactylus attenuate. <i>Pereopod 6</i> basis anterior margin with 4 robust setae, posterior margin expanded with fine setae; dactylus attenuate. <i>Pereopod 7</i> basis anterior margin with 5 robust setae, posterior margin subquadrate with fine setae along margin; dactylus attenuate.</p> <p> <b>Pleon.</b> <i>Uropod 1</i> rami subequal in length with several short robust setae along margin; peduncle elongate much longer than rami, inner margin with 5 short robust setae. <i>Uropod 2</i> biramous, inner ramus longer than outer ramus with several short robust setae along margin; peduncle subequal in length to inner ramus, inner margin lined with short robust setae. <i>Uropod 3</i> biramous, rami subequal, inner ramus slightly longer than outer; peduncle longer than rami, lined with short robust setae. <i>Telson</i> entire, longer than wide, rounded distally.</p> <p> <b>Male</b> (sexually dimorphic characters). Unknown.</p> <p> <b>Habitat</b>. Sandy biogenic substrate.</p> <p> <b>Remarks</b>. In general appearance this species shows close resemblance to species of <i>Amphilochus</i> as is particularly evident in the shape of the gnathopods, coxae, uropods and telson. However, the heavily setose peduncular article of uropod 2, subquadrate structure of pereopod 7 basis, and comparatively longer carpal lobe of gnathopod 2 (exceeding the end of propodus) are quite unlike those of any other known species of Australian <i>Amphilochus</i>. <i>Amphilochus justi</i> <b>sp. nov.</b> is quite similar to <i>A. ruperti</i> Moore, 1988, in not having a dactylar unguis on the maxillipedal palp. On the other hand it differs in the absence of accessory flagellum of antenna 1, longer carpal lobe of gnathopod 2 (extending beyond edge of palm) and the absence of submarginal minute robust setae along the anterior margins of the bases of pereopods 5–7. The other known Australian <i>Amphilochus</i>, <i>A. marionis</i> Stebbing, 1888, could be readily distinguished from <i>A. justi</i> <b>sp. nov.</b> by having propodus of gnathopod 2 as long as wide and a relatively shorter telson. Table 1 summarizes the characters and states reviewed from literature and the present study.</p> <p> <b>Distribution</b>. <i>Australia</i>. Queensland: Lizard Island (current study).</p>Published as part of <i>Azman, B. A. R., 2009, Amphilochidae *, pp. 143-152 in Zootaxa 2260 (1)</i> on pages 144-147, DOI: 10.11646/zootaxa.2260.1.7, <a href="http://zenodo.org/record/5323399">http://zenodo.org/record/5323399</a>
Talorchestia bunaken Azman, 2017, sp. nov.
No full textTalorchestia bunaken sp. nov. (Figs 1–4) Type material. Holotype, male, 10.1 mm, UKMMZ-1404 (SEM pin and 4 SEM stubs), Bunaken Island, Northern Sulawesi, Indonesia (1°37.2'N 124°45.25'E), beach, supralittoral zone, B.A.R. Azman, 16 May 2009. Paratypes: 4 females, UKMMZ-1407; 1 male, 7 females, UKMMZ-1408, same data as holotype. Type locality. Bunaken Island, Northern Sulawesi, Indonesia (1°37.2'N 124°45.25'E). Ecological type. Beach-hoppers (mainly coastal supralittoral/intertidal leaf-litter/wrack, non-substrate modifying talitrids). Etymology. Named for the type locality, Bunaken Island. Description. Based on holotype, male, 10.1 mm UKMMZ-1404. Head. Ventroproximal surface with 6 or 7 groups of slender scales. Antenna 2 slightly more than half body length (56%) ; peduncular articles with marginal row of small, robust setae; article 5 slightly longer than article 4; flagellum final article large, cone-shaped forming a virgula divina, with apical cluster of 'imbricated' setae. Labrum with apical setal patch; epistome without robust setae, without many pores. Mandible left lacinia mobilis with 5 cusps. Labium distolateral setal tuft present; without inner plates. Maxilla 1 with small palp, 2-articulate. Pereon. Gnathopod 1 coxa smaller than coxa 2; carpus 1.6 × as long as propodus, 2.4 × as long as broad; propodus subrectangular, anterior margin with 5 groups of robust setae, palm with 3 serrate setae, without spine patch on posterodistal corner; dactylus longer than palm, without anterodistal denticular patch. Gnathopod 2 sexually dimorphic; basis slender, anterior margin minutely serrate; ischium without lobe on anterior margin, with distally rounded anterodistal lobe on medial surface; carpus triangular, reduced (enclosed by merus and propodus), posterior lobe absent, not projecting between merus and propodus; propodus subovate, 1.8 × as long as wide, palm reaching about 75% along posterior margin, smooth, with strong rounded protuberance near dactylar hinge, lined with (9 + 3) medial robust setae, posteromedial surface of propodus with groove, without cuticular patch at corner of palm; dactylus longer than palm, sinusoidal, without anteroproximal bump, posterior margin lined with small robust setae, with small posteroproximal sinus and small projection. Pereopods 2–4 coxae wider than deep or as wide as deep. Pereopods 3–7 dactyli without anterodistal patch of many rows of tiny setae. Pereopod 4 significantly shorter than pereopod 3. Pereopod 5 propodus distinctly longer than carpus; dactylus without anterodistal setal patch. Pereopod 7 basis lateral sulcus present, slightly pronounced, posterodistal lobe absent; distal articles (merus and carpus) slender; merus posterior margin straight. Pleon. Epimeron 1 robust setae along ventral margin absent. Epimeron 2 subequal in length to epimeron 3. Epimeron 3 posterior margin minutely serrate, with 3 minute setae, posteroventral corner with small subacute tooth. Uropod 1 peduncle with about 12 robust setae, distolateral robust seta large (about 1/4 length of outer ramus); inner ramus subequal in length to outer ramus, with 4 medial and 4 lateral robust setae. Uropod 2 peduncle with 8 robust setae; inner ramus subequal in length to outer ramus, with 3 medial and 3 lateral robust setae; outer ramus with 1 marginal robust seta. Uropod 3 peduncle with 6 robust setae; ramus partially fused to peduncle, about 2.3 × as long as broad, ramus linear (narrowing), ramus with 4 marginal robust setae, ramus with more than 5 apical robust setae. Telson dorsal midline complete, with about 7 setae per lobe. Habitat. Sandy beaches. Remarks. Talorchestia bunaken sp. nov. belongs to the group of species with a prominent palmar protuberance near the dactylar hinge on male gnathopod 2. It shares with T. yoyoae, a very long palm on male gnathopod 2, reaching about 75–78¾ along the posterior margin of the propodus. Talorchestia bunaken differs from T. yoyoae in having a 5 or 6 cusps (sixth minute) on the left lacinia (6 cusps in T. yoyoae), in the gnathopod 1 carpus which is about 2.5 × as long as broad (3 × in T. yoyoae) and the uropod 3 ramus which is subequal to the peduncle in T. bunaken (shorter in T. yoyoae). Distribution. Indonesia. Bunaken Island, Northern Sulawesi (this study).Published as part of Azman, B. A. R., 2017, The talitrid amphipod genus Talorchestia from the South China Sea to the Indonesian Archipelago (Crustacea, Senticaudata), pp. 401-434 in Zootaxa 4319 (3) on pages 403-406, DOI: 10.11646/zootaxa.4319.3.1, http://zenodo.org/record/89224
Narapheonoides lowryi Azman, 2009, sp. nov.
No full textNarapheonoides lowryi sp. nov. (Figs 6, 7, Pl. 3A) Type material. Holotype, sex unknown, 1.9 mm, AM P70830 (in slides), Cobia Hole, Lizard Island (14°39.09’S 145°26.51’E), coarse sediment, 17 m, J.K. Lowry, 25 February 2005 (QLD 1666). Additional material examined. 1 sex unknown, AM P70799 (QLD 1654). Type locality. Cobia Hole, Lizard Island, Queensland, Australia (14°39.09’S 145°26.51’E). Etymology. This species is dedicated to Dr J.K. Lowry (The Australian Museum), collector of most of the type series for this study. Description. Based on holotype, AM P70830. Head. Head dorsal margin longer than pereonites 2 and 3 combined. Eyes large, circular. Antenna 1 slightly shorter than antenna 2; accessory flagellum 1-articulate; primary flagellum 4 articulate, each bearing a tuft of long aesthetascs ventrodistally. Antenna 2 slender, sparsely setose; gland cone stout, almost reaching distal end of peduncular article 3. Mandible molar well developed; palp absent. Maxilla 1 palp 1 articulate. Maxilla 2 outer plate longer than inner plate. Maxilliped inner plate narrow; outer plate extending beyond palp article 1; palp 4 articulate; palp article 3 with lobe on inner margin; article 4 falcate. Upper lip asymmetrically bilobed. Lower lip inner lobes undefined; shoulders of outer lobe risen, densely bristly. Gnathopod 1 scarcely subchelate; carpus gradually widening, carpal lobe extended distally to one fourth of propodus with three stout robust setae on distal margin; propodus almost straight and parallel, anterior margin with robust seta, palm with three robust setae; dactylus falcate with serrations along inner margin. Gnathopod 2 subchelate; merus subcylindrical, gradually narrowing distally, with several robust setae; carpus anterodistally produced, posterodistal end produced as gnathopod 1, with a number of robust setae along the margin; propodus as long as carpus, posterior margin gradually expanding distally with several robust setae at distal end; palm transverse; dactylus falcate with serrations along inner margin. Pereopod 3 coxa expanded, posterior margin gently concave; basis slender; merus gradually expanding on anteroproximal margin. Pereopod 4 coxa subquadrate, posterior margin extended backward; basis to dactylus slender. Pereopod 5 basis rectolinear. Pereopod 6 coxa expanded backward and downward; basis uniform in width with flange, anterior margin with several robust setae along margin; merus posterior margin gradually expanding. Pereopod 7 coxa semicircular; basis subovate, anterior margin slightly rounded with several robust setae along margin, posterior margin slightly rounded with flange; merus posterior margin gradually expanding proximally, distal extension subtriangular. Pleon. Urosomite 1 with dorsal keel. Uropod 1 well developed; extending beyond uropod 2, slender; peduncle subequal to rami in length with ventromedial process; both rami subequal to each other in length. Uropod 2 well developed; peduncle shorter than rami; outer ramus slightly longer than inner. Uropod 3 reduced; peduncle with ventromedial process; outer ramus longer than inner. Telson elongate, semioval, reaching two thirds of peduncle of uropod 3. Habitat. Coarse sediment, 17 m depth. Remarks. Narapheonoides can be easily distinguished from the remaining genera of the family Cyproideidae by these combined characters: (1) mandible with well developed molar and the absence of mandibular palp; (2) pereopod 6 basis expanded; (3) maxilla 1 palp 1-articulate; (4) urosomite 1 with keel. As mentioned by J.L. Barnard (1972), the genus Narapheonoides has the closest affinity with the Caribbean Hoplopheonoides Shoemaker, 1956, but differs from the latter in the presence of an accessory flagellum, the stronger palm of gnathopod 1 and pereopod 6 basis expanded. To date the genus contained only a single species, Narapheonoides mullaya J.L. Barnard based on material from Cape Naturaliste, Western Australia. However, the present specimen is readily distinguished from N. mullaya by having a narrower propodus and less defined palm of gnathopod 1, basis of pereopod 6 broader and by the posterodistal flange of pereopods 6 and 7. Distribution. Australia: Lizard Island, Queensland (current study).Published as part of Azman, B. A. R., 2009, Cyproideidae *, pp. 380-392 in Zootaxa 2260 (1) on pages 388-391, DOI: 10.11646/zootaxa.2260.1.19, http://zenodo.org/record/532374
Gbroidea dingaalana Lowry & Azman 2008, sp. nov.
No full text<i>Gbroidea dingaalana</i> sp. nov. <p>(Figs 2–4)</p> <p> <b>Type material.</b> Holotype female, 2.5 mm, AM P76155, off Watsons Beach, Lizard Island, Queensland, Australia (14º40’S 145º28’E), living in association with the zygometrid crinoid, <i>Zygometra microdiscus</i> (Bell, 1882), 21 m, stn QLD 2010, R. T. Springthorpe, 10 February 1987. Paratypes: 2 females, AM P38471, stn QLD 2011; 4 females, AM P38472, off Watsons Beach, Lizard Island, Queensland, Australia (14º40’S 145º28’E), living in association with <i>Comathus briareus</i> (Bell, 1882), <i>Comatula rotalaria</i> Lamarck, 1816 and <i>Zygometra microdiscus</i> (Bell, 1882), 21 m, stn QLD 2011, R. T. Springthorpe, 10 February 1987; 4 females, AM P38473, stn QLD 2010.</p> <p> <b>Type locality.</b> Off Watsons Beach, Lizard Island, Queensland, Australia (14º40’S 145º28’E), living in association with the unstalked zygometrid crinoid, <i>Zygometra microdiscus</i> (Bell, 1882), 21 m.</p> <p> <b>Etymology.</b> The species name, <i>dingaalana</i>, is based on the aboriginal tribe that visited Lizard Island before it was occupied by Europeans.</p> <p> <b>Description</b>. Based on holotype female, 2.5 mm, AM P76155.</p> <p> <b>Head</b>. Lateral cephalic lobes apically acute. <i>Eyes</i> large, irregularly round with deep brown core. <i>Antenna 1</i> flagellum with about 4 articles each with long aesthetascs distally; accessory flagellum 1 articulate. <i>Antenna 2</i> slightly shorter than antenna 1, slender; flagellum with 4 articles, apex of terminal segment with few long setae. <i>Mandible</i> molar absent. <i>Maxilla 2</i> reduced. <i>Lower lip</i> outer lobes apically produced with dense short apical setae. <i>Maxilliped</i> inner and outer plates reduced; inner plate not broad, apically truncate; outer plate extending beyond inner plate, apex with one small robust seta and several simple setae; palp 4-articulate, article 2 wider than long, dactylus apically falcate.</p> <p> <b>Pereon</b>. <i>Gnathopod 1</i> coxa vestigial; basis robust, anterior margin with 4 medium length setae, posterior margin with 1 seta posterodistally; merus not elongated, posterior margin with two setae; carpus distally expanded, anterodistally rounded with a pair of setae, posterior margin slightly produced with 3 posterodistal setae; propodus subrectangular, anterior margin with 3 setae, tooth-like process anterodistally, posterior margin straight; dactylus falcate. <i>Gnathopod 2</i> basis robust, anterior margin lined with medium length setae, posterior margin without setae; merus posterodistal margin with long setae; carpus subtriangular, subequal in length with propodus, anterior margin without setae, anterodistal margin with two setae. <i>Pereopod 3</i> coxa anterior margin expanded, rounded, posterior margin slightly concave; basis anterior margin densely setose; merus gradually expanding anterodistally. <i>Pereopod 4</i> coxa enlarged, shield-like, anterior margin almost straight, posterior margin with well developed rounded posterodistal margin; basis anterior margin straight, posterior margin slightly concave. <i>Pereopod 5</i> coxa anterior and posterior margin rounded; basis slender, rectolinear; merus posterodistal margin slightly produced. <i>Pereopod 7</i> shorter than pereopod 6; coxa anteroventral margin produced, expanded; basis anterior margin straight, with 2 setae along margin, posterior margin expanded, with distal lobe extending beyond ischium.</p> <p> <b>Pleon</b>. <i>Epimeron 3</i> posterodistal margin rounded. <i>Uropod 1</i> rami subequal, peduncle slightly shorter than rami, both margins of both rami pectinate. <i>Uropod 2</i> biramous, inner ramus shorter than outer ramus, both margins of both rami pectinate. <i>Uropod 3</i> biramous; peduncle subequal in length of inner ramus; inner ramus shorter than outer, outer margins pectinate. <i>Telson</i> entire.</p> <p> <b>Male</b>. Unknown.</p> <p> <b>Colour.</b> Antennae, head, eye, pereon and coxae deep brown with a diffused white stripe between pereon and coxae and between coxae 3–4; gnathopods, pereopods, pleopods, uropods and urosome translucent.</p> <p> <b>Habitat</b>. Living in association with the crinoids, <i>Comathus briareus</i> (Bell, 1882), <i>Comatula rotalaria</i> Lamarck, 1816 and <i>Zygometra microdiscus</i> (Bell, 1882).</p> <p> <b>Remarks</b>. <i>Gbroidea dingaalana</i> is the only cyproideid amphipod currently known from the Great Barrier Reef. During a 1987 expedition to Lizard Island, M. Grygier, J. Lowry and R. Springthorpe examined 10 specimens of three crinoids: <i>Comathus briareus</i>, <i>Comatula rotalaria</i> and <i>Zygometra microdiscus</i>. There were 11 specimens of <i>G. dingaalana</i> living on these crinoids or about 1 amphipod per host. We suspect that <i>G.dingaalana</i> has evolved an obligate commensal relationship with unstalked crinoids or is possibly an epiparasite. <i>Comathus briareus</i> and <i>Comatula rotalaria</i> are both deep brown in colour and <i>Zygometra microdiscus</i> is deep purple. The deep brown camouflage colouration of <i>G. dingaalana</i> makes it undetectable on the crinoid hosts and by inference, less susceptible to predators. The weakly developed mouthparts of <i>G. dingaalana</i> indicate that it is probably feeding on sloughed mucous or soft tissue, possibly epidermal tissue from the crinoid, similar to the uristid amphipod, <i>Euonyx chelatus</i>, which is an epiparasite of the regular sea urchin, <i>Echinus esculentus</i> (see Vader 1978; Comely & Ansell 1988). We only have information from three species of unstalked crinoids, but Messing <i>et al</i>. (2006) found 12 species of unstalked crinoids at Lizard Island.</p> <p> Interestingly Potts (1915) reported a purple amphilochid amphipod, <i>Cyclotelson purpureum</i>, associated with an unnamed crinoid, from Torres Strait. We did not find this species at Lizard Island.</p> <p> <b>Distribution</b>. <i>Australia</i>: Queensland: Lizard Island.</p>Published as part of <i>Lowry, J. K. & Azman, B. A. R., 2008, A new genus and species of cyproideid amphipod associated with unstalked crinoids on the Great Barrier Reef, Australia, pp. 59-68 in Zootaxa 1760 (1)</i> on pages 61-65, DOI: 10.11646/zootaxa.1760.1.5, <a href="http://zenodo.org/record/5123724">http://zenodo.org/record/5123724</a>
Talorchestia dili Azman, 2017, sp. nov.
No full textTalorchestia dili sp. nov. (Figs 5–8) Type material. Holotype, male, 11.4 mm, AM P.90634 (SEM pin and 4 SEM stubs), beach at Monte Veado, west of Tibar, Timor-Leste, (8°33.817'S 125°24.450'E), under small clumps of algae on coarse shell and sand, supralittoral, 20 September 2012, J.K. Lowry, R.E. Golding, M. Hugill, TM 2012-052. Paratypes: female ovigerous, AM P.90635 (SEM pin and 2 SEM stubs); many specimens, AM P.99067, same data as holotype. Additional material examined. 15 specimens, AM P.98981, among Posidonia, and brown and red algae on coarse sand and shell beach above broad mud flats and Posidonia meadows, east end of large bay between Dili and Christu Rei, East Timor (8°32.772'S 125°36.384'E), J.K. Lowry, R.E. Golding, 18 September 2012, TM 2012-012. Many specimens, AM P.99712, among leaves, twigs over coarse sand backing large mangrove forest at Gaiteho, Timor-Leste (8°34.103'S 125°26.066'E), J.K. Lowry, 22 September 2012, TM 2012-053. 70 specimens, AM P.97713, under small clumps of algae on fine white sand beach at western end of Christu Rei, Timor-Leste (8°31.358'S 125°36.556'E), J.K. Lowry and R.E. Golding, 23 September 2012, TM 2012-079. 16 specimens, AM P.97710, under small patches of seaweed over coarse black sand along edge of small freshwater stream near the sea, west of Hera, Timor-Leste (8°31.701'S 125°40.231'E), J.K. Lowry and R.E. Golding, 23 September 2012, TM 2012–081. Type locality. Beach at Monte Veado, west of Tibar, Timor-Leste (8°33.817'S 125°24.450'E). Habitat. Living among strandline debris on coarse shell and sand beaches in the supralittoral zone. Etymology. Named for original area of collection, Dili. Description. Based on holotype, male, 11.4 mm, AM P.90634. Head. Antenna 2 about as long as body (95%) ; peduncular articles with marginal row of robust setae, peduncular articles with many small robust setae; article 5 much longer than article 4; flagellar articles final article large, cone-shaped forming a virgula divina, with apical cluster of 'imbricated' setae. Labrum upper lip with apical setal patch; epistome without robust setae, without many pores. Mandible left lacinia mobilis with 5 cusps. Labium distolateral setal tuft absent; without inner plates. Maxilla 1 with small palp, 2-articulate. Pereon. Gnathopod 1 coxa smaller than coxa 2; carpus 1.7 × as long as propodus, 2.5 × as long as broad; propodus subrectangular, anterior margin with 6 groups of robust setae; dactylus longer than palm, with anterodistal denticular patch. Gnathopod 2 sexually dimorphic; basis anterior margin smooth, slender; ischium with slight rounded lobe on mid-anterior margin, distal triangular anterodistal lobe on medial surface; carpus triangular, reduced (enclosed by merus and propodus), posterior lobe absent, not projecting between merus and propodus; propodus subrhomboidal, 1.8 × as long as wide, palm reaching about 56¾ along posterior margin, smooth, without protuberance near dactylar hinge, lined with robust setae, posteromedial surface of propodus with groove, without cuticular patch at corner of palm; dactylus subequal in length to palm, sinusoidal, without anteroproximal bump, with posteroproximal sinus and stout projection. Pereopods 2–4 coxae wider than deep, or as wide as deep, or deeper than wide. Pereopod 3 dactylus without anterodistal patch. Pereopod 4 significantly shorter than pereopod 3; carpus significantly shorter than carpus of pereopod 3; dactylus without anterodistal denticular patch. Pereopod 5 propodus distinctly longer than carpus; dactylus with anterodistal denticulate patch. Pereopod 6 coxa posterior lobe medial view posteroventral corner rounded, posterior margin oblique to ventral margin, posterior lobe with ridge, with 5 or more marginal setae. Pereopod 7 basis lateral sulcus present, slightly pronounced, posterodistal lobe absent; distal articles (merus and carpus) slender; merus posterior margin straight. Pleon. Epimeron 1 robust setae along ventral margin absent. Epimeron 2 longer than epimeron 3. Epimeron 3 posterior margin smooth, with tiny setae, posteroventral corner with small subacute tooth. Uropod 1 peduncle with about 20 robust setae; inner ramus subequal in length to outer with 5 lateral and 7 medial robust setae; outer ramus without marginal robust setae. Uropod 2 peduncle about 16 robust setae; inner ramus subequal in length to outer ramus, with 4 medial and 4 lateral robust setae; outer ramus with 3 marginal robust setae. Uropod 3 peduncle with 9–10 robust setae; ramus not fused to peduncle, ramus 2.2 × as long as broad, ramus linear (narrowing), ramus with 3 marginal robust setae, ramus with more than 5 apical robust setae. Telson dorsal midline complete, 9–10 setae per lobe. Female (sexually dimorphic characters). Paratype, female, AM P.90635. Antenna 2 more than half but not exceeding body length. Gnathopod 1 carpus 3.3 × as long as broad; propodus anterior margin with 4 groups of robust setae. Gnathopod 2 basis expanded anteroproximally and anterodistally; ischium without lobe on anterior margin, without anterodistal lobe on medial surface; carpus well developed (not enclosed by merus and propodus), posterior lobe present, projecting between merus and propodus; propodus not lined with robust setae; dactylus curved, posterior margin smooth. Oostegites longer than wide (length greater than 2 × width), weakly setose. Remarks. Talorchestia dili is common to very common on sand beaches in the Dili area of Timor-Leste (personal observations, JKL). It belongs in the species group without a distal protuberance on the palm of male gnathopod 2. This species is geographically nearest to T. martensii (Weber, 1892) and is similar morphologically, but differs most obviously in the shape of the posteroventral corner of epimeron 3 (small subacute tooth in T. dili and forming a large, acutely produced tooth in T. martensii). Distribution. Timor-Leste. East and west of Dili (this study).Published as part of Azman, B. A. R., 2017, The talitrid amphipod genus Talorchestia from the South China Sea to the Indonesian Archipelago (Crustacea, Senticaudata), pp. 401-434 in Zootaxa 4319 (3) on pages 407-411, DOI: 10.11646/zootaxa.4319.3.1, http://zenodo.org/record/89224
Amphilochus lacertus Azman, 2009, sp. nov.
No full textAmphilochus lacertus sp. nov. (Figs 3, 4) Type material. Holotype, female, 2.7 mm, AM P76251 (in slides). Paratypes: 37 specimens, AM P 73185, 100 m off Freshwater Beach, Lizard Island (~ 14°41’S 145°27’E), sediment sample from sand bottom, 1.5 m, C. J. Short, 10 October 1978 (QLD 35). Type locality. Freshwater Beach, Lizard Island, Queensland, Australia (~ 14°41’S 145°27’E). Etymology. Named ‘lacertus’ in Latin for lizard, after the type locality, Lizard Island. Description. Based on holotype female, 2.7 mm, AM P76251. Head. Head lateral cephalic lobes apically round, rostrum decurved, slightly beyond peduncular article 1 of antenna 1; eyes large, irregularly round with black core. Antenna 1 slightly shorter than antenna 2, peduncular articles 1–3 with few short setae distally; flagellum with about 7 articles; accessory flagellum vestigial. Antenna 2 flagellum with 6 articles. Labium bilobed, densely pubescent apically. Lower lip shoulders densely, produced inward, with 2 small teeth on each lobe, mandibular process small. Maxilla 1 inner plate missing; outer plate with 7 large teeth; palp biarticulate, extending beyond outer plate, distal segment apical margin with several fine and robust setae. Maxilla 2 inner plate broader than outer plate with several stiff setae apically. Mandible, incisor serrate; palp 3-articulate, article 2 shorter than 1, article 3 attenuate. Maxilliped inner plate margin rounded apically, distally serrate with several fine setae; outer plate apical margin with fine and robust pectinate setae; palp stout, dactylus with unguis. Pereon. Gnathopod 1 coxa subquadrate; basis lined with several long setae along anterior margin, posterodistal margin with one seta; carpus subtriangular, slightly produced posterodistally with several pectinate setae; propodus distally expanded, anterior margin without setae; palm transverse, serrate, lined with slender setae, corner defined by 2 robust setae; dactylus inner margin serrate, distally attenuate. Gnathopod 2 coxa longer than wide; basis anterior margin without seta, anterodistal with flange, posterior margin expanded distally without setae along margin, posterodistal with one short robust seta; carpus with elongate posterior lobe extending beyond edge of palm, outer margin of lobe with 3 basal robust setae, distal part with 3 robust setae; propodus broad, gradually expanding, anterior margin without setae on medial margin, palm transverse with fine setae along margin and defined by 2 robust setae; dactylus inner margin serrate, distally attenuate. Pereopod 3 coxa subrectangular; basis elongate, anterior margin with 4 medium length setae along margin; dactylus falcate. Pereopod 4 coxa expanded medially; basis slender; carpus, propodus and dactylus lost. Pereopod 5 coxa bilobed; basis subquadrate, anterior margin with 4 robust setae, posterior with fine setae along margin; merus expanded posterodistally; dactylus falcate. Pereopod 6 basis anterior margin with 5 robust setae, posterior margin medially expanded with fine setae along margin; dactylus falcate. Pereopod 7 basis expanded, anterior margin with 4 short robust setae, posterior margin with fine setae; dactylus falcate. Pleon. Uropod 1 rami subequal in length, with short setae along margin; peduncle slightly shorter than rami with several short setae on inner margin. Uropod 2 inner ramus longer than outer ramus, lined with short setae along medial margin; peduncle shorter rami. Uropod 3 lost. Telson entire, longer than wide, apically acute. Male (sexually dimorphic characters). Unable to determine adult male among broken specimens. Habitat. Sandy bottom. Remarks. Amphilochus lacertus sp. nov. appears to be closely related to A. justi. They more or less agree in the structure of the pleonal epimera 1–3, antennae and uropods. The gnathopods are also nearly identical, except that basis of gnathopod 1 lined with medium length setae along its anterior margin. Further, the rostrum is extending beyond article 1 of antenna 1. Among the more important features characteristic of the present species is the overall structure of maxilliped. In A. lacertus the maxilliped is somewhat stouter especially in palp articles 1–3, the presence of the dactylar unguis also add to these differences. Distribution. Australia. Queensland: Lizard Island (current study).Published as part of Azman, B. A. R., 2009, Amphilochidae *, pp. 143-152 in Zootaxa 2260 (1) on pages 147-151, DOI: 10.11646/zootaxa.2260.1.7, http://zenodo.org/record/532339
Cyproidea cobia Azman, 2009, sp. nov.
No full textCyproidea cobia sp. nov. (Figs 1, 2, 3, Pl. 2G) Type material. Holotype, sex unknown, 4.2 mm, AM P78320 (in slides), Cobia Hole, Lizard Island (14°39.09’S 145°26.51’E), coarse sediment, 17 m, J.K. Lowry, 25 February 2005 (QLD 1666). Paratype: 1 unsexed, AM P70762, Loomis Beach moorings, Lizard Island, Queensland (14°41.027’S 145°26.877’E), sand & silt, sandy bottom, 3 m, J. Just, 25 February 2005 (QLD 1650). Type locality. Cobia Hole, Lizard Island, Queensland, Australia (14°39.09’S 145°26.51’E). Additional Material Examined. 1 unsexed, AM P70781 (QLD 1666); 2 unsexed, AM P70913 (QLD 1672). Etymology. Named after the type locality. Description. Based on holotype, sex unknown, AM P70837. Head. Head lateral cephalic lobe narrowly rounded apically; eyes large and round. Antenna 1 peduncle article 2 produced distally; primary flagellum with 7 articles. Antenna 2 slender and slightly longer than antenna 1. Mandible molar vestigial; palp present, with 3 articles, long and slender; lacinia mobilis multidentate; incisor strongly dentate. Maxilla 1 palp 1-articulate. Maxilla 2 outer plate longer than inner, both generally setose. Maxilliped outer plate not reaching the distal margin of palp article 1; palp with 4 articles, article 3 terminating in a lobe, article 4 dactylate. Upper lip asymmetrically. Lower lip apical margin of the outer lobe with small and deep cleft; mandibular process rounded. Pereon. Gnathopod 1 subchelate; coxa vestigial; basis slender with minute setae along anterior margin; ischium posterior margin bristly; merus produced into triangular process; carpus subtriangular, not produced in the posterior lobe, with long setae and bristly; propodus subovate, palm serrated; dactylus attenuate, inner margin serrate. Gnathopod 2 carpochelate; coxa vestigial; basis subrectangular; ischium subrectangular, posterior process not developed; carpus lobe extending almost two third of propodus; propodus subovate, palm serrated; dactylus, inner margin serrated, attenuated. Pereopod 3 coxa expanded, broadly triangular; basis to dactylus slender. Pereopod 4 coxa very developed, relatively bigger than coxa 3; basis to dactylus slender. Pereopod 5 basis rectolinear. Pereopod 6 coxa small with minute seta posterodistally; basis rectolinear. Pereopod 7 coxa small with minute seta posterodistally; basis slightly expanded proximally. Pleon. Pleonite 3 without dorsodistal process. Epimeron 3 posteroventral corner rounded. Urosomite 1 without dorsal keel. Urosomite 3 with triangular process reaching beyond half of telson. Uropod 1 peduncle longer than rami; rami subequal in length with minutely pectinate. Uropod 2 similar to uropod 1 but smaller. Uropod 3 peduncle as long as inner ramus, outer ramus slightly longer than inner. Telson apically rounded. Habitat. Coarse sediment, 3–17 m. Remarks. The genus Cyproidea is characterized by a having transverse palm on gnathopod 2, vaulted urosomite 3 overlapping the telson, telson small and not reaching apex of peduncle 3. So far, only five species of Cyproidea have been described, Cyproidea ornata Haswell, 1879, based on material from Port Jackson, New South Wales; Cyproidea liodactyla Hirayama, 1978, from Japan; Cyproidea marmorata Moore, 1981, from Tinderbox, Tasmania; Cyproidea robusta Ren, 2006 from Hainan, China; and Cyproidea serratipalma Schellenberg, 1938, from New Caledonia. The new species can be distinguished from all other existing species of Cyproidea by the following characteristics: (1) the basis of gnathopod 2 is rectolinear whereas in the remaining species they are somewhat expanded anteriorly; (2) the posterodistal process of gnathopod 2 ischium is not developed, on the contrary it is well developed in the rest of the species. Cyproidea cobia sp. nov. closely resembles Cyproidea liodactyla in having slightly produced carpal lobe of gnathopod 1 and subequal length of uropod 2 rami, but is easily distinguishable by the undeveloped posterodistal process of gnathopod 2 ischium. However, in terms of body size Cyproidea cobia at 4.2 mm is distinctly larger than Cyproidea liodactyla (2.8 mm), Cyproidea marmorata (3.5 mm) and Cyproidea serratipalma (4.0 mm). Distribution. Australia. Queensland: Lizard Island (current study).Published as part of Azman, B. A. R., 2009, Cyproideidae *, pp. 380-392 in Zootaxa 2260 (1) on pages 381-385, DOI: 10.11646/zootaxa.2260.1.19, http://zenodo.org/record/532374
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