Alternative spelling: Ostracea
Parent taxon: Ostreina according to L. W. Ward and B.W. Blackwelder 1987
See also Adegoke 1977, Beu et al. 1990, Bieler and Mikkelsen 2006, Bolton and Portell 2013, Bouchet et al. 2010, Carter et al. 2011, Coan et al. 2000, Cooper 2002, Dockery 1982, Glenn 1904, Gliozzi and Malatesta 1983, Lam and Morton 2009, Maxwell 1992, Nevesskaja 2009, Newell 1965, Ride et al. 1999, Rivera 1957, Schnetler et al. 2024, Squires 1984, Squires 1987, Squires 1999, Squires 2018, Stilwell et al. 2004, Todd 2001, Vokes 1980 and Ward 1992
Sister taxon: Ostreoidea
Subtaxa: none
Ecology: stationary epifaunal suspension feeder
Distribution:
• Oligocene of New Zealand (1 collection)
• Eocene of Libya (1)
• Jurassic of Spain (2), Tunisia (10)
• Triassic of New Zealand (1)
Total: 15 collections each including a single occurrence