Loxocauda cf. orientalis, Schornikov, 2011

Yoo, Hyunsu, Huyen, Pham Thi Minh, Chae, Jinho & Karanovic, Ivana, 2023, Three Loxocaudinae species (Ostracoda, Podocopida) from South Korea, ZooKeys 1138, pp. 183-209 : 183

Loxocauda cf. orientalis

Figs 11 , 12

Material examined.

One male, dissected on one slide (NIBRIV0000882304), shell on micropaleontological slide (NIBRIV0000882314); one female, dissected on one slide (NIBRIV0000882310) and shell on micropaleontological slide (NIBRIV0000882312); one male and female dissected on slide each, and shells on micropaleontological slide each; South Korea, Gyeongsangnam-do, Geoje-si, Irun-myeon, Jisepohaean-ro , Jisepo harbor. 34°49.919'N, 128°42.220'E, 19 May 2020, leg. Hyunsu Yoo & Byung-jin Yoo.

Brief description.

Male. Carapace same as in L. orientalis (Figs 11A , 12A, B ). Differences include dorsal margin being straighter, and greatest H situated close medially. A2 (Fig. 11B ) with well-developed setulae on second and third segments. Hp (Fig. 11C ) with basal plate sub-rectangular and with three bare setae antero-distally. Lobe with sub-triangular form. No strong muscles present.

Other appendages same as in L. orientalis Schornikov, 2011

L ratios between segments as indicated below:

A1 Six-segmented. 2.4: 1.2: 1: 1.1: 1.4: 1.3.

A2 Four-segmented. 6.4: 2.9: 9.8: 1.

L5 Four-segmented. 3.5: 1.9: 1: 1.2.

L6 Four-segmented. 3.3: 2.4: 1: 1.3.

L7 Four-segmented. 2.4: 1.9: 1: 1.2.

Female. Larger than male (Fig. 13B ). L ~ 459 µm, H ~ 267 µm. Shape and all other morphological features similar to male. GF illustrated in Fig. 11D . Basal plate sub-triangular. Ovary subquadrate. With three bare setae on antero-medial margin. All other appendages same as in male.

Figures

Figure 11. Loxocauda cf. orientalis: male (NIBRIV 0000882304, NIBRIV 0000882314) A RV internal view B A 2 C Hp; female (NIBR 0000882310) D GF. Scale bars: 50 µm (B, C, D); 100 µm (A).

Figure 12. SEM photographs of Loxocauda cf. orientalis: male (NIBRIV 0000882314) A RV external view B RV internal view C muscular scar print D simple seta pore on external carapace.

Figure 13. Internal view of female carapace A Glacioloxoconcha jeongokensis sp. nov. (NIBRIV 0000882311 allotype) B Loxocauda cf. orientalis (NIBRIV 0000882312) C Loxocauda orientalis Schornikov, 2011 (MABIKCR 0025820).