The family Aristiidae (Crustacea: Amphipoda: Lysianassoidea) in Australian waters Author Stoddart, H. E. helen.stoddart@austmus.gov.au Author Lowry, J. K. text Zootaxa 2010 2010-07-26 2549 1 31 53 https://biotaxa.org/Zootaxa/article/view/zootaxa.2634.1.5 journal article 10.11646/zootaxa.2634.1.5 1175-5326 Pratinas ludmilla sp. nov. ( Figs 19–21 ) Type material . HOLOTYPE , female, approx. 2.5 mm , AM P.81149, East Point, Darwin, Northern Territory , Australia , approx. 12°27'S 130°50'E , possibly on encrusting ascidian Didemnum psammatode , stn. EP/9 [ AM stn NT-108]. PARATYPES : 1?male, 2.0 mm, AM P.81150 and 1 female , 2.6 mm , AM P.81151 and 100 specimens , AM P.81152 and 20 specimens , NTMAG , same data as holotype ; 20 specimens , AM P.81153, west end of East Point, north end of Fannie Bay, Darwin, Northern Territory , Australia , 11°24.5'S 130°48.5'E , gorgonaceans Echinogorgia sp. 1 (red) and Echinogorgia sp. 2 (orange), 8–10 m , 26 October 1982 , J.K. Lowry, stn NT-95; 3 specimens , AM P.81154, west end of East Point, north end of Fannie Bay, Darwin, Northern Territory , Australia , 11°24.5'S 130°48.5'E , 8–10 m , gorgonacean Rumphella aggregata , 26 October 1982 , J.K. Lowry, stn NT-96. FIGURE 19. Pratinas ludmilla gen. sp. nov. Paratype, female, 2.6 mm, AM P.81151. Type locality . East Point , Darwin , Northern Territory , Australia , approx. 12°27'S 130°50'E . Etymology . The species is named for Ludmilla Creek in the East Point/Fannie Bay area. Description . Head lateral cephalic lobe broadly triangular, apically subacute; eyes well developed, oval. Antenna 1 accessory flagellum 2-articulate. Epistome and upper lip with small central notch. Mandible lacinia mobilis absent; molar absent. Maxilla 1 inner plate with 3 apical pappose setae; outer plate with 7 setal-teeth in a 5/2 arrangement, most with moderate number of cusps. Maxilliped palp 4-articulate, palp article 1 with lateral and medial margins about same length. Gnathopod 1 subchelate; carpus shorter than propodus, without posterodistal lobe; propodus posterior margin dentate, with 1 robust seta along posterior margin. Gnathopod 2 carpus longer than propodus. Pereopods 5–7 propodus with anterodistal spur. Pereopod 5 coxa posterior lobe deeper than anterior lobe, short, distally rounded; basis moderately expanded posteriorly, with posteroventral lobe. Pereopod 6 coxa posterior lobe deeper than anterior lobe, short, distally rounded; basis greatly expanded posteriorly, with posteroventral lobe. Pereopod 7 basis moderately expanded posteriorly, posterior margin evenly curved, with posteroventral lobe, posteroventral corner rounded. Epimeron 3 posterior margin smooth, posteroventral corner subacute . Urosomite 1 smooth dorsally, without a dorsodistal boss. Urosomite 3 without dorsolateral flanges. Uropod 3 rami without robust setae; inner ramus longer than article 1 of outer ramus. Telson longer than broad, entire, emarginate, without middorsal robust setae, lateral margins straight, uniformly tapering distally, without robust setae on lateral margins, with 2 small apical robust setae along distal margin. Distribution . Darwin, Northern Territory , Australia in 8–10 m depth.