Aristias gomoni Stoddart &amp; Lowry 2010, sp. nov.
Creators: name: Stoddart, H. E.
name: Lowry, J. K.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Aristiidae
Aristias
Aristias gomoni

description: <i>Aristias gomoni</i> sp. nov. (Figs 4–6) <b>Type material</b>. HOLOTYPE, female, 7.5 mm, MV J59372, south of Point Hicks, Victoria, Australia, 38°17.70'S 149°11.30'E, 400 m, coarse sand, gravel, mud, many sponges, WHOI epibenthic sled, 24 July 1986, M.F. Gomon <i>et al.</i>, RV <i>Franklin</i>, stn SLOPE 40. PARATYPES: 5 females, MV J59373, and 1 female, 6.5 mm, AM P.81145, same data as holotype; 2 specimens, female, 5.5 mm and immature, 3.5 mm, AM P68502, Ling Hole, off west coast of Tasmania, Australia, 41°23’29”S 144°21’24”E to 41°24’18”S 144°19’15”E, 330 m, Sherman sled, associated with anemones, 20 April 2004, CSIRO party, RV <i>Southern Surveyor</i>, stn SS 04/04/51. <b>Type locality</b>. South of Point Hicks, Victoria, Australia, 38°17.70'S 149°11.30'E, 400 m depth. <b>Etymology</b>. The species is named for Martin Gomon who collected the type specimen. <b>Diagnostic description</b>. <i>Head</i> lateral cephalic lobe broadly triangular, apically subacute; eyes well developed, reniform. <i>Antenna 1</i> accessory flagellum 4-articulate. <b> <i>Epistome and upper lip</i> with central notch</b> . <i>Mandible</i> lacinia mobilis present on left mandible; molar a weakly setose flap. <i>Maxilla 1</i> inner plate with 8 pappose setae along inner margin; <b>outer plate with 14 setal-teeth</b> in a 12/2 arrangement, most with many cusps. <i>Maxilliped</i> palp 4-articulate, palp article 1 with lateral margin much longer than medial margin. <i>Gnathopod 1</i> parachelate; carpus subequal in length to propodus, without posterodistal lobe; propodus posterior margin dentate, with 5 robust setae along posterior margin. <i>Gnathopod 2</i> carpus longer than propodus. <i>Pereopods 5–7</i> propodus with anterodistal spur. <i>Pereopod 5</i> coxa posterior lobe deeper than anterior lobe, short, triangular; basis moderately expanded posteriorly, with posteroventral lobe. <i>Pereopod 6</i> coxa posterior lobe deeper than anterior lobe, short, triangular; basis greatly expanded posteriorly, with posteroventral lobe. <i>Pereopod 7</i> basis greatly expanded posteriorly, posterior margin abruptly tapered distally, with posteroventral lobe, posteroventral corner rounded. <i>Epimeron 3</i> posterior margin smooth, <b>posteroventral corner narrowly rounded</b>. <b> <i>Urosomite 1</i> with</b> an anterodorsal depression and <b>a rounded dorsodistal boss</b>. <i>Urosomite 3</i> without dorsolateral flanges. <i>Uropod 3</i> rami with robust setae only on apices of outer ramus article 1; inner ramus about as long as article 1 of outer ramus. <b> <i>Telson</i> shorter than broad, moderately cleft</b> , without mid-dorsal robust setae, lateral margins curved, uniformly tapering distally, without robust setae on lateral margins, without apical robust setae. <b>Remarks</b>. Based on pereopods 5–7 propodus each with a spur, pereopod 7 basis with a tapering posterior margin and epimeron 3 with a narrowly rounded posteroventral corner, <i>A. gomoni</i> is similar to <i>A. stenopodus</i> from just north of Madagascar and to <i>A. verdensis</i> from the Philippine Islands. <i>Aristias gomoni</i> is distinguished from these species by the large number of setal-teeth (14) on the outer plate of maxilla 1. <b>Distribution</b>. South-eastern Australia in 330–429 m depth.
description: Published as part of <i>Stoddart, H. E. &amp; Lowry, J. K., 2010, The family Aristiidae (Crustacea: Amphipoda: Lysianassoidea) in Australian waters, pp. 31-53 in Zootaxa 2549 (1)</i> on pages 35-36, DOI: 10.11646/zootaxa.2634.1.5