Bythocypris

Abstract

Bythocypris sp. aff. B. mozambiquensis Maddocks, 1969 (Figs. 27, 28, 29.K, L, O, 30.E, F, K, L, S) Material. 5 live specimens. 1 A F (SNB 0259­60), 1 A M (SNB 0262), 1 (A­1) (SNB 0261) ANDEEP III, # 16–10–S, ZMH K­ 41298; 1 (A­1) (SNB 0258), ANDEEP III, # 16–10–E, ZMH K­ 41299; 1 A F (SNB 0265), ANDEEP III, # 16–11, ZMH K­ 41300; Distribution. Cape Basin, Southeastern Atlantic, 4686 to 4727m. Measurements (Fig. 28). A LV, L 1.81–1.92mm, H 0.93–1.04mm; (A­1) L 1.42–1.48mm, H 0.78– 0.84mm. Description. The characters not described herein are similar to the ones described in the section of B. malyutinae sp. nov. LV subtriangular, high in relation to length; posterodorsal margin of LV straight. RV with upswung posterior. Posterior conspicuously protruding in both valves. Hemipenis with coiled vas deferens; strongly sclerotized sub­rectangular, arched, short proximal lobe; and sub­conical thick distal lobe armed distally with numerous chitinous spines. Genital lobe subtriangular. Chaetotaxy AI 1(0/0), 2(0/0: 1i), 3(.2/0), 4(.1/.1), 5(.2­3/.2), 6(.3/.2), 7(0/0:5). AII 1(0/0: 2i), 2(0/0: 1i), Exopodite(0/0:3), 3(0/.3­4.1c,1), 4(0/.1r.1c,1), 5(.1.1c,1/1,1r,1c), 6(0/1c,2­3:1c). Md Base (.1/0: 5t,4­5), Exopodite(0/0:3p), Palp 1(0/1: 1i), 2(.1.3­4/0­2:0­ 1 i), 3(.5./1:2), 4(.3/0:2­3c,1­3). MxI Vibratory plate(8­ 9a,25­26p), Palp(.1.1.1/.2.:1pc). ApV 1(.1.2­3.2­3/0), Vibratory plate(9­14a,4­6p), 2(0/.2­3), [+or Not fused]3(0/1), 4(0/.1), 5(0/0:.1,1c,1). ApVI and ApVII 1(.1.1.2/0), Exopodite(2), 2(0/.2), 3(0/.1), 4(0/.1), 5(0/ 0:1,1c,1). Fu (.1r./.3.2­3.1r.1.1.1.1). Remarks. Maddocks (1969) described B. mozambiquensis from the Mozambique Channel, the Southwestern Pacific and the Gulf of Mexico (1140 to 3850m). The specimens studied herein: (1) are more smoothly rounded larger than the ones described by Maddocks, which present angulated lateral outline; (2) present a more acute posterior margin.