Query: Extinct bivalves
Relevant documents:
Longnut
Pleurobema stabile
Unio cariei
Fordilloidea
Megalodontoidea
Chesapecten jeffersonius
Trigonioidea
Gryphaea dilatata
Tuarangia
Concavodontinae
Praenuculinae
Trigoniida
Cyprina ligeriensis
Arca mailleana
Hippurites atheniensis
Hippurites cornuvaccinum
Modiomorphida
Swiftopecten djoserus
Inoceramus cuvieri