Globosolembos springthorpei Myers, 2009, sp. nov.
Creators: name: Myers, Alan A.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Aoridae
Globosolembos
Globosolembos springthorpei

description: <i>Globosolembos springthorpei</i> sp. nov. (Figs 35, 36, Pl. 2B) <b>Type material.</b> Holotype, male, 4.0 mm, AM P 75467, 500 m north-east of North Point, Lizard Island (14°38.700’S 145°27.213’E), <i>Halimeda</i> sp. (green alga) with epiphytes, soft bottom with forams, crinoids, <i>Halimeda macroloba</i>, <i>Halimeda cylindracea</i>, <i>Caulerpa taxifolia</i>, <i>Gracilaria</i> sp., <i>Lobophora</i> sp) and sediment, 23.9 m, R. T. Springthorpe, 27 February 2005 (QLD 1707). Paratypes: 7 males, 3 females, same data as holotype, AM P75468 (QLD 1707). <b>Additional material examined.</b> 1 male, 1 female, AM P71009 (QLD 1707). <b>Type Locality.</b> Off North Point, Lizard Island, Queensland, Australia (14°40'S 145°28'E). <b>Etymology.</b> Named for Roger Springthorpe, who collected all the material of this new species. <b>Description.</b> Based on holotype, male, 4.0 mm, AM P75467. <b>Head.</b> <i>Head</i> lateral cephalic lobes apically rounded; eye large, orange brown. <i>Antenna 1</i> flagellum with about 16 articles; accessory flagellum multiarticulate. <i>Antenna 2</i> with moderately profuse long setae. <i>Lower lip</i> with fine setae and stout setae. <i>Maxilla 1</i> inner plate with 1 long pectinate apical seta. <i>Mandible</i>, palp article 3 1.5 x length of article 2, posterior margin weakly falcate, posterior margin with setae of more than two distinct lengths. <b>Pereon.</b> <i>Pereonites</i> without sternal spines. <i>Gnathopod 1</i> enlarged in both sexes; coxa weakly produced anterodistally, rounded; basis robust, half or more as broad as long, anterodistal margin with strong flange; ischium anterior margin without flange, posterior margin with few setae; merus not greatly elongated, fused along its entire length with carpus, posterior margin with few setae, without posterodistal spine; carpus one quarter length of propodus, anterior margin without spine; posterior margin with obtuse spine; propodus anterior margin moderately setiferous, posterior margin convex, palm short, straight, delimited from posterior margin, margin forming a broad excavate sinus, defined by strong posterodistal marginal spine, without robust seta, without spine near base of dactylus; dactylus less than half length of propodus, overlapping palm. <i>Gnathopod 2</i> subchelate; basis anterodistal margin with flange, posterodistal margin without robust setae, with few setae along length of basis; merus not enlarged or produced away from carpus; carpus distinctly longer than propodus, anterior margin not lobate, with long setae; carpus and propodus anterior margin with sparse long setae, palm with robust seta defining palm. <i>Pereopod 3</i> without brush of long setae on merus. <i>Pereopod 6</i> basis not produced posterodistally. <i>Pereopod 7</i> less than 125% length of pereopod 6. <b>Pleon.</b> <i>Epimeron 3</i> posterodistal margin rounded. <i>Uropod 1</i> rami subequal, peduncle much longer than broad, distoventral spine much less than one third length of peduncle. <i>Uropod 2</i> biramous; peduncle with distoventral spine much less than half length of peduncle. <i>Uropod 3</i> biramous, rami distinctly unequal, endopod about 1.5 x length of peduncle. <i>Telson</i> with distal fine setae only. <b>Female</b> (sexually dimorphic characters). Based on paratype, female, 3.5 mm, AM P75468. <i>Gnathopod 1</i> carpus more than one third length of propodus; propodus palm oblique, convex, delimited by acute, triangular spine, dactylus shorter and stouter than that of male. <b>Habitat.</b> <i>Halimeda</i> with epiphytes. <b>Remarks.</b> This species is very close to <i>G. forgesi</i> Myers, 1998 from New Caledonia, but differs in a number of ways. In the male gnathopod 1, the carpus is much shorter (about one quarter the length of the propodus), than it is in <i>G. forgesi</i> (more than a third length of propodus) and is strongly produced posterodistally (scarcely produced in <i>G.forgesi</i>); the spine on the posterior margin of the propodus is marginal in <i>G. springthorpei</i> <b>sp. nov.</b> but submarginal in <i>G. forgesi</i>. In the male gnathopod 2, the carpus of <i>G. springthorpei</i> is distinctly longer than the propodus whereas these two articles are subequal in <i>G. forgesi</i>. In the female gnathopod 1 the spine on the posterior margin of the propodus is acute in <i>G. springthorpei</i> but obtuse in <i>G. forgesi</i>. The uropod 1 distoventral spine of <i>G. springthorpei</i> scarcely reaches one quarter the length of the peduncle whereas in <i>G. forgesi</i> it approaches one half the length of the peduncle. Finally, article 3 of the mandibular palp is 1.5 x the length of article 2 in <i>G. springthorpei</i> whereas in <i>G. forgesi</i> articles 2 and 3 are subequal. <b>Distribution.</b> <i>Australia</i>. Queensland: off North Point, Lizard Island (current study).
description: Published as part of <i>Myers, Alan A., 2009, Aoridae *, pp. 220-278 in Zootaxa 2260 (1)</i> on pages 265-268, DOI: 10.11646/zootaxa.2260.1.9, http://zenodo.org/record/5321091
description: {"references": ["Myers, A. A. (1998) The Amphipoda (Crustacea) of New Caledonia: Aoridae. Records of the Australian Museum, 50 (2), 187 - 210."]}