V 

 IV 



Septibranchia 



-V 



Anatinacea Teredinidae Gastrochaenidae 



PholaMidae y^ 



Saxicavidae Scrobiculariidae 



Myidae Solenidae Tellinidae 



Lutrariidae. 



Mesodesmatidae 



Donacidae 



Mactridae 



Chamidae 



\ Tridacnidae 



Aetheriidae \ / 



\ Cardiidae 



Cycladidae \Mutelidae \ 



\ \ / Isocardiidae 

 Rangiidae \ Unionidae 



Cyrenidae 



Dreissensiida 

 Modiolarcidae 



Carditidae 

 Crassatellidae 



Petricolidac 

 Veneridae 



Cyprinidae 



Montacutidae 



Chlamydocunchidae 

 Lasaeidae Galeommatidae 



Lucinidae Leptonidae 



.Uneulinidae 



Astartidae 



III 



Ostreidae \ 



Aviculacea Pseudolamellibranchia 



Pectinacea I 



II 



Mytilidae / Dimyidae ^^.Philobryidae 



Anomiidae^ / / / ^^Arcidae-"''^ 



-Pectunculidae — 



Ledidae 



Nuculidae 



Solenomyidae 



Protobranchia 



