Pontocythere xiphoidea Nakao and Tsukagoshi,, 2002

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 : 126

6. Pontocythere xiphoidea Nakao and Tsukagoshi, 2002 ( Fig. 8 )

Synonymy

Pontocythere xiphoidea sp. nov. ­ Nakao and Tsukagoshi (2002): p. 78, figs. 5E-Q, 6.

Material examined. One male dissected on slide ( NIBR IV0000813452), shell of on micropalaeontology slide ( NIBRIV 0000813452).

Locality in Korea. Muui­do, Hanagae Beach, littoral, 37°23.126 ʹ N 126°24.526 ʹ E, 26/05/2012, coll. Ivana Karanovic.

Identifier. Ivana Karanovic.

Diagnosis. Small ostracod (less than 1 mm). Carapace elongated in lateral view ( Fig. 8A, B ), with greatest height situated slightly in front of middle. Dorsal margin rounded, with small groove on left valve behind middle. Posterior margin narrow and with prominent caudal process. Anterior margin also narrow. Ventral margin straight. Surface not pitted, and with several ridges being strong in the anterior part, fading away towards posterior end, and absent in the middle. Antennula 5­segmented ( Fig. 8C ), antenna 4­segmented ( Fig. 8D ). Hemipenis with triangular distal process ( Fig. 8E ).

Distribution. The species has been reported only once from Japan ( Nakao and Tsukagoshi, 2002). This is the first record for Korea.

Figures

Fig. 8. Pontocythere xiphoidea Nakao and Tsukagoshi, 2002. Male.A, Left valve; B, Right valve; C, Antennule; D, Antenna; E, Copulatory organ.