Bivalvia
The "Bivalvia" class contains 119 families divided into 50 superfamilies
Arcidae
Cardiidae
Chamidae
Cyrenidae
Donacidae
Glycymerididae
Gryphaeidae
Isognomonidae
Limidae
Lucinidae
Mactridae
Margaritidae
Mytilidae
Ostreidae
Pectinidae
Pharidae
Pinnidae
Psammobiidae
Pteriidae
Solenidae
Spondylidae
Tellinidae
Veneridae
(23 families___50 species___103 shells)