Tuberocandona, Külköylüoğlu & Ataman & Gibson & Diaz, 2023

Kuelkoeylueoglu, Okan, Ataman, Alper, Gibson, Randy & Diaz, Peter, 2023, A new genus, Tuberocandona gen. nov. (Crustacea, Ostracoda, Candonidae) and past to present ostracod species diversity in Texas (USA), Subterranean Biology 45, pp. 119-140 : 119

Genus: Tuberocandona gen. nov.

Figs 2 , 3 , 4

Genus diagnosis.

Carapace sub-rectangular with two tubercules or nodes on each side (diagnostic character) and surface ornamented with deep hexagonal and pentagonal cells covered with dense spines. Both marginal zones with dense spines. Tubular pore canals with a short sensory seta (diagnostic character), aperture lobate. LV overlaps RV on all sides. Hinge adont. Five adductor muscle scars, one frontal and one mandibular scars visible in about the center of the valves. Inner lamella wide at both ends. LV with an anteroventral node. Selvage absent. A1 6-segmented. Rome and Wouter’s organs absent. A2 4-segmented, y1-2 and swimming setae absent. t-setae not transformed in the male. z1-seta absent in males, z2 seta present. Mandibular palp 4-segmented; alpha and beta setae absent (see discussion). Second segment with 4 setae internally, and two setae externally. Third segment with a thin slightly plumose gamma seta. Terminal segment slightly rectangular with one fused claw and one claw-like seta. Maxillula with three endites and two (I-II) segmented palp. Claws on third endite not bristled. Terminal segment of Mxl-palp subsquared. First thoracopod symmetrical in female but transformed into prehensile palps in male. Walking leg (T2) 5-segmented with “d1” seta on basal segment. Cleaning leg (T3) 5-segmented with “d1” seta present. Terminal segment with one long, one medium and one short seta. Uropod well developed with anterior and posterior claws and anterior seta, posterior seta absent. Genital lobe in female rounded without appendages. Zenker organ with 5 whorls. Hemipenis large with outer lobe (lobe a) oval, inner lobe (lobe b) rounded, and large medial lobe (lobe h) subtriangular.

Type species.

Tuberocandona leonidasi sp. nov. Külköylüoğlu, Ataman, Gibson, Diaz.

Derivation of name.

A word with Latin origin “tubero”, meaning "tubercle, lump, node", is combined with the genus name Candona (gender feminine) due to presence of two tuberculated (noded) alae type of structures on both sides of the carapace.

Figures

Figure 2. Tuberocandona leonidasi sp. nov. A LV external view ♂ (Holotype) B RV external view of ♀ (Allotype) C LV internal view of ♀ (Allotype) (dorsal margin broken) and D RV internal view of ♂ with hinge (Paratype) (posteroventral margin broken) E dorsal view of ♂ (Paratype) F muscle scars of ♂ G tubular pore canal of ♂. Scale bars: 70 µm (A-E); 10 µm (F, G) (two-sided arrow).

Figure 3. Tuberocandona leonidasi sp. nov. A A 1 B A 2 C Md D Mx 1 E A 2 F rake-like organ G right clasping organ H left clasping organ. A-D, F-H ♂ (Holotype); E ♀ (Allotype). Scale bar: 10 μm.

Figure 4. Tuberocandona leonidasi sp. nov. A T 1 B T 2 C T 3 D uropod and uropodal attachment E hemipenis F Zenker's Organ G genital organ. A, G ♀ (Allotype); B-F ♂ (Holotype). Scale bar: 10 μm.