Bythocypris

Brandão, Simone N., 2008, New species of Bairdioidea (Crustacea, Ostracoda) from the Southern Ocean and discussions on Bairdoppilata simplex (Brady, 1880),? Bairdoppilata labiata (Müller, 1908) and Bythopussella aculeata (Müller, 1908) *, Zootaxa 1866, pp. 373-452 : 420-421

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.

Figures

FIGURE 27. Occurrence of Bythocypris mozambiquensis species group. Legend: — B. malyutinae sp. nov. (herein);

FIGURE 28. Length: height scatter plot of the valves of Bythocypris mozambiquensis group. Legend: B. maly. – B. malyutinae sp. nov. (herein); B. aff. maly. – B. aff. malyutinae (herein); B. aff. moz. – B. sp. aff. B. mozambiquensis (herein); B. moz. – B. mozambiquensis (measurements from Maddocks 1969); B. [sic] moz. – B. [sic] mozambiquensis (specimen USNM 121612 from Maddocks 1969, Fig. 46. P); B. elt. – B. eltanina (from Maddocks 1969); B. pro. – B. promoza (from Maddocks 1973); B. sct. – B. spiriscutica (from Maddocks 1969).