Ostracod Research at the Lake Biwa Museum, Japan

Robin James Smith

Genus Cryptocandona Kaufmann, 1900

Superfamily: Cypridoidea Baird, 1845
Family: Candonidae Kaufmann, 1900
Subfamily: Candoninae Kaufmann, 1900

Two species have been reported from Japan:

1. Cryptocandona brehmi (Klie, 1934)

Right side view of a female Cryptocandona brehmi, length 0.85mm.

External view of a female left valve of Cryptocandona brehmi, length 883 microns.

Additional figures in: Namiotko, & Danielopol 2002, Smith 2011, Chang et al. 2012.
Habitat: A cave (Klie 1934), and a spring-fed pond (Smith 2011).
Mode of life: Benthic.
Reproductive mode: Asexual. Males unknown.
Known distribution: Shiga Prefecture (Smith 2011) and Nagano Prefecture (Klie 1934), Japan. Elsewhere, known from South Korea (Chang et al. 2012).
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.
⚬ Namiotko, T. and Danielopol, D. L. 2002. Morphology and phylogenetic affinities of Cryptocandona brehmi (Klie, 1934) (Ostracoda, Podocopida). Crustaceana, 74, 1349-1363.
⚬ 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.

2. Cryptocandona tsukagoshii Smith 2011

External view of a female left valve of Cryptocandona tsukagoshii, length 708 microns.

Photograph of the type locality: a tributary of the Yasu River, Tsuchiyama-cho, Koka, Shiga Prefecture, N35º 00’ 18.1", E136º 22’ 26.7", altitude 608 m (29 January 2010).

Additional figures in: Smith 2011, Chang et al. 2012.
Habitat: River gravels (Smith 2011) and springs (Chang et al. 2012).
Mode of life: Interstitial.
Reproductive mode: Probably asexual. Males unknown.
Known distribution: Shiga Prefecture, Japan (Smith 2011) and South Korea (Chang et al 2012).
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.