Renella sculptidentata ( Ren, 1991 )

Lowry, J. K. & Stoddart, H. E., 2012, The Pachynidae fam. nov. (Crustacea: Amphipoda: Lysianassoidea) 3246, Zootaxa 3246 (1), pp. 1-69 : 54-57

Renella sculptidentata ( Ren, 1991)

( Figs 37–39 )

Drummondia sculptidentata Ren in Ren & Huang, 1991: 242, 306, figs 34, 35. ― De Broyer & Jazdzewski, 1993: 67. ― Gutt et al., 2000: 80, 83.

Coriolisa sculptidentata . ― Lowry & Stoddart, 1994: 149.

Renella sculptidentata . ― De Broyer et al., 2007: 158.

Material examined. 1 male, 5.8 mm, 1 immature, 3.5 mm, AM P.85255, Bahia Chile [= Discovery Bay], South Shetland Islands, [approx. 62°29'S 59°43'W], Chilean Antarctic Expedition, stn 78-8 . – 1 female (with oostegite buds), 7.0 mm, AM P.85256, same locality, Chilean Antarctic Expedition, stn 78-12 . – 3 females, MV J38224 , western part of MacRobertson Shelf , Antarctica, 66°55.51'S 62°32.72'E to 66°55.33'S 62°32.16'E, 113 m, epibenthic sled, 11 February 1993, M. O'Loughlin, RSV Aurora Australis , stn AA93-124 .

Description. Head lateral cephalic lobe large, broadly rounded; ventral margin curved. Antenna 1 peduncular article 1 with posterodistal spine; accessory flagellum 2-articulate, article 1 short; flagellum with strong 1-field callynophore in female and male. Mandible lacinia mobilis a simple robust seta; lamina dentata absent; accessory setal row present, on raised setose ridge; molar a setose flap; palp attached slightly distally; palp article 2 broad, as long as article 3; article 3 with anterior margin convex, not tapered distally. Maxilla 1 outer plate with 11 setal-teeth in 7/ 4 arrangement, setal-teeth with medial cusps; palp vestigial, 2-articulate, apical setae absent. Maxilliped inner plate small; outer plate large; palp 4-articulate, article 4 large. Gnathopod 1 chelate; ischium smaller than propodus, not swollen posteroproximally; carpus extremely compressed; propodus length about 2 × breadth, posterior margin well developed, palm with produced corner, corner of palm with complex robust seta; dactylus reaching to corner of palm. Gnathopod 2 palm large, transverse. Pereonite 4 without dorsal spines. Pereonite 5 with 1 dorsal spine. Pereopod 5 merus with posteroproximal shoulder. Pereopod 6 basis with posteroventral lobe weakly produced; merus as broad as long, with posteroproximal shoulder. Pereopod 7 basis subrectangular with posterior margin weakly dentate. Epimeron 3 posterior margin without projections, posteroventral corner broadly rounded. Uropod 3 biramous, inner ramus extending less than halfway along outer ramus. Telson as long as broad, weakly emarginate.

Distribution. South Shetland Islands and eastern Weddell Sea, Southern Ocean; MacRobertson Shelf,

Antarctica; 113–400 m depth .

Figures

FIGURE 37. Renella sculptidentata (Ren, 1991). Female, 6.4 mm, MV J38224, Prydz Bay, Antarctica.

FIGURE 38. Renella sculptidentata (Ren, 1991). Female, 6.4 mm, MV J38224, Prydz Bay, Antarctica. Scales represent 0.1 mm.

FIGURE 39. Renella sculptidentata (Ren, 1991). Female, 6.4 mm, MV J38224, Prydz Bay, Antarctica. Scales represent 0.2 mm.