Ostracod families

Cylindroleberididae is a family of ostracods that shows remarkable morphological diversity. The defining feature is the possession of gills: 7–8 leaf-like pairs at the posterior of the body. Other features common to all species in the family include a "baleen-comb" on both the maxilla and the fifth limb, a sword-shaped coxal endite on the mandible, and the triaenid bristles on the basal endites of the mandible.

Bythocytheridae is a family of ostracods belonging to the order Podocopida.

Xestoleberididae is a family of ostracods belonging to the order Podocopida.

Hemicytheridae is a family of ostracods belonging to the order Podocopida.

Cyprididae is "the most diverse group of freshwater ostracods". It contains over 1000 species, which represents 50% of the known species of freshwater ostracods (other speciose families include Candonidae, with 25%, and Limnocytheridae, with 10%). Around 60% of genera in the family are endemic to a single zoogeographic region. The family contains 16 subfamilies, and is most diverse in the Afrotropical realm, with over 300 species in 45 genera. Many Cyprididae occur in temporary water bodies and have drought-resistant eggs, mixed/parthenogenetic reproduction and ability to swim. These biologica

Cypridinidae is a family of ostracods. About half of all known species are bioluminescent. Some use the light only for defence, others also for courtship displays. The lineages with sexually dimorphic bioluminescent displays have more species other lineages, which indicates that bioluminescent courtship could increase the diversification rates.

Leptocytheridae is a family of ostracods belonging to the order Podocopida.

Halocypridae is a family of ostracods in the order Halocyprida. Some members are bioluminescent, such as Conchoecia pseudodiscophora, and are believed to use coelenterazine and a coelenterazine luciferase, rather than vargulin.

Candonidae is a family of ostracods, containing around 25% of all known species of freshwater ostracods. Around 75% of genera in the family are endemic to a single zoogeographic region. It contains more than 500 species, of which more than 300 are endemic to the Palearctic realm.

Cytherellidae is the only living family of the ostracod order Platycopida. Eyes are absent. It contains 11 genera: †Abursus Loranger, 1954 †Alveus Hamilton, 1942 †Ankumia Veen, 1932 Cytherella Jones, 1849 Cytherelloidea Alexander, 1929 †Geelongella McKenzie, Reyment & Reyment, 1991 Grammcythella Swanson et al., 2005 Inversacytherella Swanson et al., 2005 Keijcyoidea Malz, 1981 Platella Coryell & Fields, 1937 †Staringia Veen, 1936

Thaumatocyprididae is a family of ostracods in the order Halocyprida which contains seven genera and one subfamily. It first appeared in the Lopingian Epoch, 259.9 million years ago.

Notodromadidae is a family of ostracods belonging to the order Podocopida.

Cytherideidae is a family of ostracods belonging to the order Podocopida.

Polycopidae is a family of marine ostracods. Its members are related to animals in the suborder Halocypridina, but are sufficiently distinct to be placed in the sub-order Cladocopina. There is even some speculation that a separate order may be warranted. The genera in the family differ from the other suborder, Halocypridina, in several features: the central adductor muscle scars are in a triangular (3 scars) or half-rosette (15 scars) pattern, they lack sixth and seventh limbs, and the maxilla (=fourth limb) has both an exopod and endopod (the maxilla in the Halocypridina lacks an exopod).

Ilyocyprididae is a family of ostracods belonging to the order Podocopida.

Limnocytheridae is a family of ostracods, containing the following genera: Cytheridella Daday, 1905 Gomphocythere Sars, 1924 Leptocytheromorpha Purper, 1979† Limnocythere Brady, 1968 Minicythere Ornellas, 1974

Thaerocytheridae is a family of crustaceans belonging to the order Podocopida.

Kliellidae is a family of crustaceans belonging to the order Podocopida.