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

 

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).

NIBR

National Institute of Biological Resources

Kingdom

Animalia

Phylum

Arthropoda

Class

Ostracoda

Order

Podocopida

Family

Loxoconchidae

Genus

Loxoconcha

Loc

Loxoconcha japonica Ishizaki, 1968

Karanovic, Hyunsu Yoo and Ivana 2019
2019
Loc

Loxoconcha japonica

Ishizaki, K. 1968: 28
1968
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