OSTRACOD RESEARCH

at the Lake Biwa Museum, Japan


Robin James Smith

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Genus Dolerocypris Kaufmann, 1900

Superfamily: Cypridoidea Baird, 1845
Family: Cyprididae Baird, 1845
Subfamily: Dolerocypridinae Triebel, 1961

Three species have been reported from Korea:

1. Dolerocypris fasciata (O.F. Müller, 1776)

Figures in: Kim & Min 1991 (carapace and appendages), Meisch 2000 (carapace and appendages).
Habitat: Littoral zone of lakes, especially around water weeds, ponds and swamps (Meisch 2000).
Mode of life: Nektobenthic (swimmer).
Reproduction mode: Asexual, males unknown.
Known distribution: Found throughout South Korea (Kim & Min 1991). Generally, Holarctic (Meisch 2000).

References:
Kim, W. & Min, G. S. 1991. Redescription of recent freshwater ostracods (Crustacea: Ostracoda) from Korea: A systematic study of four species of family Cyprididae. Korean Journal of Systematic Zoology, 7, 81-100.

Meisch, C. 2000. Freshwater Ostracoda of Western and Central Europe. In: Schwoerbel, J., Zwick, P., (Eds.), Süßwasserfauna von Mitteleuropa 8/3. Spektrum Akademischer Verlag, Heidelberg, Berlin 522 pp.


2. Dolerocypris ikeyai Smith & Kamiya, 2006


Left side view of a female Dolerocypris ikeyai, length about 1.1 mm. In this genus, the right valve overlaps the left. The colour of the carapace varies from green through to pale green/blue to white.



External view of a female left valve of Dolerocypris ikeyai, length 1066 microns.



External view of a female right valve of Dolerocypris ikeyai, length 1078 microns.


Additional figures in: Smith & Kamiya 2006 (carapace and appendages); Smith 2011 (carapace and caudal ramus); Chang et al. 2012 (carapace).
Habitat: Typically found in the runoff of small springs and seeps.
Mode of Life: Benthic.
Mode of reproduction: Sexual populations are known from two small Japanese islands, Yakushima and Tagashima. Elsewhere, asexual.
Distribution: South Gyeongsang Province, North Gyeongsang Province (Chang et al. 2012). Elsewhere, known from Japan (Smith 2011; Tanaka et al. 2015).

References:
Chang, C. Y., Lee, J. & Smith, R. J. 2012. Nonmarine ostracods (Crustacea) from South Korea, including a description of a new species of Tanycypris Triebel (Cyprididae, Cypricercinae). Zootaxa, 3161, 1-19.

Smith, R. J. 2011. Groundwater, spring and interstitial Ostracoda (Crustacea) from Shiga Prefecture, Japan, including descriptions of three new species and one new genus. Zootaxa, 3140, 15-37.

Smith, R. J. & Kamiya, T. 2006. Six new species of fresh and brackish water ostracods (Crustacea) from Yakushima, Southern Japan. Hydrobiologia, 559, 331-355.

Tanaka, H., Kotorii, H., Yokozawa, K., Wakabayashi, F., Kimoto, K. & Sano, K. 2015. Distribution and occurrence of freshwater Ostracoda (Crustacea) from southwest region of Mt. Fuji. TAXA, Proceedings of the Japanese Society of Systematic Zoology, 38, 26-41. [In Japanese with English abstract.]



3. Dolerocypris sinensis Sars, 1903


Left side view of a female Dolerocypris sinensis, length 1.9 mm. In this genus, the right valve overlaps the left.


External view of a female left valve of Dolerocypris sinensis, length 1815 microns.



External view of a female right valve of Dolerocypris sinensis, length 1877 microns.


Additional figures in: Kim & Min 1991 (carapace and appendages), Meisch 2000 (carapace).
Habitat: Often found in rice fields (Okubo 1972) and the littoral zone of lakes (Meisch 2000).
Mode of Life: Nektobenthic (swimmer).
Mode of reproduction: Asexual, males unknown.
Distribution: Found throughout South Korea (Kin & Min 1991; Smith et al. 2014). Generally, Eurasia (Meisch 2000).

References:
Kim, W. & Min, G. S. 1991. Redescription of recent freshwater ostracods (Crustacea: Ostracoda) from Korea: A systematic study of four species of family Cyprididae. Korean Journal of Systematic Zoology, 7, 81-100.

Meisch, C. 2000. Freshwater Ostracoda of Western and Central Europe. In: Schwoerbel, J., Zwick, P., (Eds.), Süßwasserfauna von Mitteleuropa 8/3. Spektrum Akademischer Verlag, Heidelberg, Berlin 522 pp.

Okubo, I. 1972. Freshwater Ostracoda from Japan, I. Two species of the genus Dolerocypris Kaufmann, 1900. Review of Shujitsu Junior College, Okayama, 1, 41-60.

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.