Genus Paracypria Sars, 1910
Superfamily: Cypridoidea Baird, 1845
Family: Candonidae Kaufmann, 1900
Subfamily: Paracypridinae Sars, 1923
Two species have been reported from Japan:
1. Paracypria adnata Smith & Kamiya, 2006 
Left side view of a Paracypria adnata, length about 0.6 mm.
External view of a left valve of a female of Paracypria adnata, length 573 microns.
External view of a right valve of a female of Paracypria adnata, length 560 microns.
The male sexual organ of Paracypria adnata, length 79 microns.
- Additional figures in: Smith & Kamiya 2006.
- Habitat: Typically a brackish water species, but occasionally found in freshwater habitats along coasts (e.g. freshwater rock pools above the foreshore).
- Mode of life: Nektobenthic (swimmer).
- Reproductive mode: Sexual.
- Known distribution: Yakushima Island, Kagoshima Prefecture (Smith & Kamiya 2006).
- References:
- ⚬ Smith, R. J. & Kamiya, T. 2006. Six new species of fresh and brackish water ostracods (Crustacea) from Yakushima, Southern Japan. Hydrobiologia, 559, 331 - 355.
2. Paracypria inujimensis (Okubo, 1980)
Left side view of a Paracypria inujimensis, length about 0.8 mm. The coloration of this species is quite variable, often with dark grey to black patches, sometimes completely black. This ethanol preserved specimen is somewhat faded.
External view of a left valve of a male of Paracypria inujimensis, length 779 microns.
External view of a right valve of a male of Paracypria inujimensis, length 773 microns.
The surface of the carapace is covered with longitudinal, fine, slightly wavy striations. Width of field of view 389 microns.
The male sexual organ of Paracypria inujimensis, length 150 microns.
- Figures in: Okubo 1980; Wouters 1999; Smith & Kamiya 2003.
- Habitat: Typically a brackish water species, but occasionally found in freshwater habitats along coasts (e.g. freshwater rock pools above the foreshore).
- Mode of life: Nektobenthic (swimmer).
- Reproductive mode: Sexual.
- Known distribution: Seto Inland Sea (Okubo 1980), Okayama Prefecture (Smith & Kamiya 2003), Yakushima Island, Kagoshima Prefecture (Smith & Kamiya 2006).
- References:
- ⚬ Okubo, I. 1980. Three new species of the family Candonidae (Ostracoda) from the Inland Sea of Japan. Proceedings of the Japanese Society of Systematic Zoology, 18, 18-27.
- ⚬ Smith, R. J. & Kamiya, T. 2003. Three brackish water ostracods (Crustacea) from Okayama Prefecture, Japan. Species Diversity, 8, 79-91.
- ⚬ Smith, R. J. & Kamiya, T. 2006. Six new species of fresh and brackish water ostracods (Crustacea) from Yakushima, Southern Japan. Hydrobiologia, 559, 331 - 355.
- ⚬ Wouters, K. 1999. Two new species of the genus Phlyctenophora Brady, 1880 (Crustacea, Ostracoda) from the Indo-Pacific realm. Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, Biologie, 69, 83-92.