Bythocypris malyutinae, Brandão, Simone N., 2008

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

Bythocypris sp. 1 aff. B. malyutinae sp. nov.

( Figs. 27 , 28 , 29.G–J, X, Y, 30.C, D, I, J, T)

Material. 6 live specimens. 1 A M (SNB 0308), 1 (A­2) (SNB 0309), ANDEEP III, # 88–8–U, ZMH K­ 41304; 3 A F (SNB 0310­12), ANDEEP III # 88–8–S, ZMH K­ 41306; 1 (A­3) (SNB 0272), ANDEEP III, # 94–10, ZMH K­ 41305.

Measurements ( Fig. 28 ). A LV, L 1.78–1.94mm, H 0.88–1.01mm; (A­2) L 1.20mm, H 0.64m; (A­?3) L 0.86mm, H 0.50mm.

Distribution. Eastern Weddell Sea, Southern Ocean (Atlantic Sector), 4894 to 4932m.

Description. The characters not described herein are similar to the ones described in the section of B. malyutinae sp. nov. Posterodorsal margin of LV slightly concave.

Chaetotaxy AI 1(0/0), 2(0/0: 1i), 3(.2/0), 4(.1­2/.1), 5(.2­5/.2), 6(.3­5/.2), 7(0/0:5). AII 1(0/0: 2i), 2(0/0: 1i), Exopodite(0/0:3), 3(0/.3.1c,1), 4(0/.2r.1c,1), 5(.1.1c,1/1,1r,1c), 6(0/.1c,2­3:1c). Md Base (.1/0: 3­5t,3­6), Exopodite(0/0:3p), Palp 1(0/.1: 1i), 2(.1.4/.1­2:1­ 2 i), 3(.5./.1:2), 4(.3./.1.:2­3c,2). MxI Vibratory plate(6­ 10a,22­29p), Palp(.1.1.0­1/.2.:1pc). ApV 1(.1.3.3/0), Vibratory plate(9­14a,4­5p), 2(0/.2), [+or Not]3(0/.1), 4(0/.1), 5(0/0:.1,1c,1). ApVI and ApVII 1(.1.1.2/0), Exopodite(0/0:2), 2(0/.2), 3(0/.1), 4(0/.1­2), 5(0/ 0:1,1c,1). Fu (.1r./.3.2.1r.1.1.1.1).

Remarks. The specimens included in Bythocypris sp. 1 aff. B. malyutinae differ from B. malyutinae sp. nov. on the following characters: (1) slightly more protruding posterior; (2) number of strahlen and feathered setae on the vibratory plate of maxilla I and appendage V; (3) hemipenis with more elongate terminal lobe, with shorter spiny distal portion.

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).