Aristias poorei 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 poorei

description: <i>Aristias poorei</i> sp. nov. (Figs 13–15) <b>Type material.</b> HOLOTYPE, female, 4.4 mm, MV J59377, south of Point Hicks, Victoria, Australia, 38°21.90'S 149°20.00'E, 1000 m, WHOI epibenthic sled, 23 July 1986, G.C.B. Poore <i>et al</i>., RV <i>Franklin</i>, stn SLOPE 32. PARATYPES: male, 3.8 mm, MV J59378 and 1 female, 4.2 mm, MV J59379 and 3 specimens, AM P.71819, same data as holotype; 2 specimens, MV J39380, south of Point Hicks, Victoria, Australia, 38°19.60'S 149°24.30'E, 930 m, rock, rubble, clay, sand, biogenic sediment, WHOI epibenthic sled, 23 July 1986, M.F. Gomon <i>et al</i>., RV <i>Franklin</i>, stn SLOPE 33. <b>Type locality.</b> South of Point Hicks, Victoria, Australia, 38°21.90'S 149°20.00'E, 1000 m depth. <b>Etymology.</b> The species is named for Gary Poore who collected the type specimen and has made much lysianassoid material available for our studies. <b>Diagnostic description.</b> <i>Head</i> lateral cephalic lobe rounded; eyes well developed, oval. <i>Antenna 1</i> accessory flagellum 2-articulate. <i>Antenna 2</i> calceoli not present in male. <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 5 pappose setae along inner margin; <b>outer plate with 7 setal-teeth</b> in a 5/2 arrangement, most with moderate number of cusps. <i>Maxilliped</i> palp 4-articulate, palp article 1 with lateral and medial margins about same length. <i>Gnathopod 1</i> subchelate; carpus shorter than propodus, without posterodistal lobe; propodus posterior margin dentate, with 4 robust setae (in pairs) along posterior margin. <i>Gnathopod 2</i> carpus longer than propodus. <b> <i>Pereopods 5–7</i> propodus without anterodistal spur</b> . <i>Pereopod 5</i> coxa posterior lobe deeper than anterior lobe, short, distally rounded; basis moderately expanded posteriorly, with posteroventral lobe. <i>Pereopod 6</i> coxa posterior lobe deeper than anterior lobe, long, distally truncated; basis greatly expanded posteriorly, with posteroventral lobe. <i>Pereopod 7</i> basis greatly expanded posteriorly, posterior margin evenly curved, with posteroventral lobe, posteroventral corner rounded. <i>Epimeron 3</i> posterior margin smooth, <b>posteroventral corner subacute</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 without robust setae; inner ramus longer than article 1 of outer ramus. <i>Telson</i> longer than broad, <b>moderately cleft</b>, without mid-dorsal robust setae, lateral margins curved, abruptly tapering distally, without robust setae on lateral margins, without apical robust setae. <b>Remarks.</b> <i>Aristias poorei</i> has the same maxilla 1 setal-tooth arrangement as <i>A. thio</i> from New Caledonia. They are also among the few species of <i>Aristias</i> without a distal spur on the propodus of pereopods 5–7. They differ from each other in the posteroventral corner of epimeron 3 which is slightly produced and subacute in <i>A. poorei</i> and narrowly rounded in <i>A. thio</i>. Based on these characters <i>A. poorei</i> and <i>A. thio</i> are considered as sister-species. <b>Distribution.</b> South-eastern Australia in 930–1000 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 43-44, DOI: 10.11646/zootaxa.2634.1.5