Loxoconcha japonica Ishizaki, 1968

Karanovic, Hyunsu Yoo and Ivana, 2019, Six species of the ostracod families Loxoconchidae and Cushmanideidae from South Korea, Journal of Species Research 8 (1), pp. 116-127 : 118

publication ID	https://doi.org/ 10.12651/JSR.2019.8.1.116
DOI	https://doi.org/10.5281/zenodo.8139546
persistent identifier	https://treatment.plazi.org/id/03866345-FFCD-FFD4-FCF4-2530FBE5F835
treatment provided by	Felipe
scientific name	Loxoconcha japonica Ishizaki, 1968
status

Treatment

2. Loxoconcha japonica Ishizaki, 1968 View in CoL ( Fig. 2 View Fig )

Synonymy

Loxoconcha japonica View in CoL sp. nov. Ishizaki (1968): p. 28, Pl. 2, Fig. 1 View Fig ; Pl. 6, Figs. 1012.

Loxoconcha japonica Ishizaki View in CoL Ishizaki (1971): p. 86, Pl. 3, Fig. 21; Okubo (1980): p. 416, Figs. 12, 13, 18ad; Paik and Lee (1988): Pl. 3, Fig. 17; Tohru et al. (2005): Fig. 1A View Fig .

Material examined. One female dissected on slide ( NIBR IV0000813441), shell of on micropalaeontology slide ( NIBRIV 0000813441).

Locality in Korea. Gyeongsangnamdo, Goseonggun , littoral, 34°59.629 ʹ N 128°26.201 ʹ E, 04/04/2012, coll. I. Karanovic. GoogleMaps

Identifier. Ivana Karanovic.

Diagnosis (female only). Small ostracod, less than 1 mm long ( Fig. 2A, B View Fig ). Dorsal margin broadly rounded. Posterior margin rounded but with one clear caudal process terminated at 2/3 of height. Anterior margin rounded, and narrower than posterior one. Ventral margin straight to slightly concave. Valves not asymmetrical. Surface regularly reticulated. Marginal zone with long, straight canals. Hinge of Loxoconcha type (gongylodont). Antennula slender 6segmented ( Fig. 2C View Fig ); all setae thin. Antenna 4segmented with two distal claws ( Fig. 2B View Fig ).

Distribution. Species has been recorded throughout Japan. Paik and Lee (1988) also reported this species from PlioPleistocene deposits from Korea. Beside Okubo (1980) this is the second report of the species soft parts.

Remarks. The identification was based only on female specimens, because males have not been collected. Nevertheless, there are no significant differences between the original description and illustrations and our current record. This species belongs to the japonica species group ( Tanaka and Ikeya, 2002).