†Acratina (ostracod)
Ostracoda - Podocopida - Bairdiidae
Parent taxon: Bairdiidae according to S. Crasquin-Soleau 2006
Sister taxa: Abrobairdia, Actuaria, Anisobairdia, Arcibairdia, Bairdia, Bairdiacypris, Bairdiolites, Bispinacratia, Bohlenatia, Ceratobairdia, Fabalicypris, Heterobairdia, Isobythocypris, Kempfina, Krausella, Lanczichebairdia, Lobobairdia, Mirabairdia, Orthobairdia, Parabairdiacypris, Paracypris, Paramacrocypris, Petasobairdia, Praelobobairdia, Praezabythocypris, Ptychobairdia, Pustulobairdia, Sinabairdia, Spinobairdia, Spinocypris, Truncobairdia, Urobairdia, Vanganardia, Xixionopsis
Subtaxa: Acratina diffusa, Acratina gusevae, Acratina nostorica
Ecology: epifaunal detritivore-grazer