Genus Chrissia Hartmann, 1957
Superfamily: Cypridoidea Baird, 1845
Family: Cyprididae Baird, 1845
Subfamily: Herpetocypridinae Kaufmann, 1900
Two species have been reported from Japan:
1. Chrissia formosa (Klie, 1938)
Left side view of a female Chrissia formosa, length about 1.5 mm.
External view of a female left valve of Chrissia formosa, length 1566 microns.
External view of a female right valve of Chrissia formosa, length 1553 microns.
- Additional figures in: Klie 1938; Victor & Fernando 1981; Okubo 2004; Smith et al. 2011.
- Habitat: Paddy fields (Okubo 2004), Lake Biwa (Smith et al. 2011). Elsewhere reported from a freshwater lagoon (Victor & Fernando 1981). vMode of life: Nektobenthic (swimmer).
- Reproductive mode: Asexual, males unknown.
- Known distribution: Shiga Prefecture (Smith et al. 2011), Shizouka Prefecture (Kato 1944). Elsewhere known from Taiwan (Klie 1938), and the Philippines (Victor & Fernando 1981).
- References:
- ⚬ Kato, K. 1944. Stenocypris from Izu. Zoology Magazine, 56, 57.
- ⚬ Klie, W. 1938. Ostracoden aus Formosa. Bulletin of the Biogeographical Society of Japan, 8, 21-33.
- ⚬ Okubo, I. 2004. Nihon tansui san kaimijinko rui ni tsuite. Kabushikigaisha Sanmon Insatsusho, Okayama, Japan, 72pp. [In Japanese, privately published].
- ⚬ Smith, R. J., Janz, H. & Okubo, I. 2011. Recent Cyprididae and Ilyocyprididae (Crustacea: Ostracoda) from Lake Biwa, Japan, including a summary of the lake's ostracod fauna. Zootaxa, 2874, 1-37.
- ⚬ Victor, R. & Fernando, C.H. 1981. Freshwater Ostracoda of the genera Chrissia Hartmann, 1957 and Stenocypris Sars, 1889 from Malaysia, Indonesia and the Philippines. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut, 78, 151-168.
2. Chrissia vittata Okubo, 1974 
- Figures in: Okubo 1974; Okubo 2004.
- Habitat: Rice fields (Okubo 1974); pond, field (Broodbakker 1988). Mode of life: Nektobenthic (swimmer).
- Reproductive mode: Asexual, males unknown.
- Known distribution: Kagoshima Prefecture (Okubo 1974; 2004; Broodbakker 1988); Okinawa (Broodbakker 1988). Currently only known from Japan.
- References:
- ⚬ Broodbakker, N. W. 1988. Ecology and distribution of groundwater Crustacea and freshwater Ostracoda in SW Honshu and the Nansei Islands, Japan. Verlagen en Technische Gegevens Institute voor Taxonomische Zoologie, 53, 1-21.
- ⚬ Okubo, I. 1974. Chrissia vittata sp. nov. from Japan (Ostracoda, Cyprididae). Proceedings of the Japanese Society of Systematic Zoology, 10, 1-9.
- ⚬ Okubo, I. 2004. Nihon tansui san kaimijinko rui ni tsuite. Kabushikigaisha Sanmon Insatsusho, Okayama, Japan, 72pp. [In Japanese, privately published].