Mazepovacandona navitarum (Mazepova, 1976)

Karanovic, Ivana & Sitnikova, Tatiana Ya., 2017, Morphological and molecular diversity of Lake Baikal candonid ostracods, with description of a new genus, ZooKeys 684, pp. 19-56 : 26

Mazepovacandona navitarum (Mazepova, 1976) Figs 6, 7, 14C, 15C

Baicalocandona navitarum sp. n. - Mazepova (1976): p. 72, fig. 9

Baicalocandona navitarum Mazepova - Mazepova (1990): p. 292, fig. 125, 126B

Material examined.

One male soft body used for DNA extraction and after that dissected and mounted on a glass slide (shell of one SEM stub), collected from 12-15 m depth by SCUBA diving off Listvyanka, 51°51'51.3"N, 104°50'37.8"E, 12 September 2015, collectors: Igor Khanaev and Ivan Nebesnykh.

Short redescription.

Valves asymmetrical: LV subtriangular with pointed dorsal margin, RV with rounded dorsal margin (Fig. 6A, C). Posterior end much narrower than anterior end. Surface with shallow pits and reticulation only on the anterior part of the shell. Surface cuticular pores of only one type, with small lip (Fig. 6B, D). Size about 0.6 mm.

A1 7-segmented. Male A2 with subdivided penultimate segment and t2- and t3-setae transformed into sexual bristles; z2-setae transformed into claw, z1- and z3-setae untransformed; G1- and G3-claws reduced and short, G2-claw long (Fig. 7B). Prehensile palps (Fig. 7C, D) with almost equally long bodies and fingers, fingers hook-shape. L6 (Fig. 7E) with basal seta reaching far beyond distal margin of basal segment. L7 (Fig. 7F) clearly 5-segmented; basal segment with d1- and dp-setae; no e- or f-setae, g-seta long; terminal segment with setae h2- and h3- long and h1-seta shorter. UR (Fig. 7H) with all setae and claws; posterior seta not particularly long, and posterior claw almost half as long as anterior one. Hemipenis (Figs 7B, 14C) with a-lobe relatively triangular and not projecting; M-peace rounded distally, ejaculatory tube with pointed distal end. Zenker organ (Fig. 15C) with 3+2 whorls of spines; anterior cap hemispherical, with strongly sclerified margin.

Females not collected.