Ostracod Research at the Lake Biwa Museum, Japan

Robin James Smith

Genus Tanycypris Triebel, 1959

Superfamily: Cypridoidea Baird, 1845
Family: Cyprididae Baird, 1845
Subfamily: Cypricercinae McKenzie, 1971

One species has been reported from Japan:

1. Tanycypris alfonsi Nagler, Geist & Matzke-Karasz, 2014

Left side view of a female Tanycypris alfonsi, length 1.3 mm.

Dorsal view of a female Tanycypris alfonsi, anterior to left, length 1.3 mm.

External view of a female left valve of Tanycypris alfonsi, length 1253 microns.

External view of a female right valve of Tanycypris alfonsi, length 1242 microns.

Additional figures in: Okubo 1972 (as Strandesia camaguinensis); Okubo & Ida 1989 (as Tanycypris pellucida); Okubo 2004 (as Tanycypris pellucida); Nagler et al. 2014; Smith et al. 2014.
Habitat: Rice fields and ponds.
Mode of life: Nektobenthic (swimmer).
Reproductive mode: Asexual.
Known distribution: Okayama Prefecture (Okubo 1972 as Strandesia camaguinensis), Gunma Prefecture (Okubo & Ida 1989, as Tanycypris pellucida). Elsewhere, Korea (Smith et al. 2014), and Germany, where it is considered to be an alien species (Nagler et al. 2014).
References:
⚬ Nagler, C., Geist, J. & Matzke-Karasz, R. 2014. Revision of the genus Tanycypris (Ostracoda, Cypricercinae) with the description of Tanycypris alfonsi n. sp., and an identification key to the genus. Zootaxa, 3821, 401-424.
⚬ Okubo, I. 1972. Strandesia camaguinensis Tressler, 1937, from Japan (Ostracoda, Cyprididae). Proceedings of the Japanese Society of Systematic Zoology, 8, 9-14.
⚬ Okubo, I. 2004. Nihon tansui san kaimijinko rui ni tsuite. Kabushikigaisha Sanmon Insatsusho, Okayama, Japan, 72pp. [In Japanese, privately published].
⚬ Okubo, I. & Ida, K. 1989. Freshwater Ostracoda from Gunma Prefecture, Japan (In Japanese). Bulletin of the Biogeographical Society of Japan, 44, 105-107.
⚬ Smith, R. J., Lee, J. & Chang, C. Y. 2014. Nonmarine Ostracoda (Crustacea) from Jeju Island, South Korea, including descriptions of two new species. Journal of Natural History, http://dx.doi.org/10.1080/00222933.2014.946110, 1-40.