PRORHIPIDOCLOSSA 



POLYCH/ETA 

 ERRANT 1 A 



octopoda) 



(ecopsioaI "^ CEPHALOPODA 



nautiloidea] ' 



AMMONITOIDEAJTETRABRANCHIA 



SEPTIBRANCHIA 

 EULAMELLIBRANCHIA | 



PELECYPODA 



FILIBRANCHIA 

 PROTOBRANCHIA 



SCAPHOPODA 



STYLOHMATOPHOHAJ 

 B0SOMHATOPHOR6 I PULMONATA 



NUDIBRANCHIA ) 



nCTiBRANCHiA ( OPISTHOBRANCHIA ^ 



STENOCLOSSA I ) GASTROPODA 



T^NiooLossA I pectinibranchia/^'^^'^"^"'^^ 



RHIPIDOCLOSSA 



OOCOOIOSSA i ASPIDOBRANCHIA 



aplacophora UmPHINEURA 



polyplacophora) 



