COMPLETE LIST OF CLASSES AND ORDERS 50 



Class Subcl Order 



Caenogastropoda ^^ 

 Opisthobranchia ^* 



Pleurocoela ^^ {Tectibranchiata, Tectobranchia, Aply- 



siacea, Steganobranchia) 

 Pteropoda 

 Sacoglossa 

 Acoela ""^ 

 Pulmonata 



Basommatophora 

 Stylommatophora 

 BIVALVIA ®^ (Pelecypoda, Lamellibranchiata, Aglossa, Lipoce- 

 phala, Conchijera, Conchophora, Acephala) 

 Protobranchia "* 

 Filibranchia '^^ 

 Eulamellibranchia ^° 

 Septibranchia 

 SCAPHOPODA {Cirrhobranchiata, Solenoconchia, Prosopocepha- 

 la, Lateribranchiata) 

 Scaphopoda 

 CEPHALOPODA (Siphonopoda) 



Tetrabranchiata (Schizosiphona, Tentaculifera) 

 Nautiloidea ^^ 

 Ammonitoidea ^^ 

 Dibranchiata {Coleoidea, Acetabulifera, Holosiphona) 

 Decapoda ^^ (Decembrachiata, Decabrachia) 



^^ Includes: Siphonobranchia, Pectinibranchia, Ctenobranchiata, Hemipoma- 

 tostoma, Apomatostoma, Monotocardia, Azygobranchia, Mesogastropoda, Steno- 

 glossa, Neogastropoda, Rachiglossa, Toxoglossa, Heteropoda, Taenioglossa, Platy- 

 poda, Rhachiglossa. 



^Includes: Gymnosomata, Oncidiacea, Acochlidiacea, Vaginulacea, Ana- 

 spidea. 



^^ Includes: Cephalaspidea, Thecosomata, Bullomorpha, Gyrosomata. 



''^ Includes: Notaspidea, Pleurobranchomorpha, Nudibranchiata. 



^'' Includes: Anisomyaria, Anatinacea, Cladocopa, Ambonodonta. Groups 

 sometimes recognized include: Siphonida, Asiphonida, Homomyaria, Macrocilio- 

 branchia, Microciliobranchia, Pteriomorpha, Colloconchida, Eutaxodonta, Isofili- 

 branchia, Pteroconchida, Rostroconchida, Heteroconchia, Eudesmodontida, Nai- 

 adida, Pachyodontida, Pantodontida, Asthenodontida, Schizodontida, Heterodon- 

 tida, Septibranchida. Also used as orders: Autobranchiata, Dimyaria, Eleuthero- 

 rhabda, Hemibranchia, Heteromya, Heteromyaria, Isedrolotila, Isomya, 

 Laternulacea, Macrotrachia, Monomyaria, Monomya, Neotaxodonta, Palaeo- 

 branchia, Palaeolamellibranchia, Parafilibranchia, Pholadacea, Pleuroconcha, 

 Pleurodonta, Praeheterodonta, Synaptorhabda, Veneracea. 



ORD-REC 

 MIS-REC 

 MIS-REC 



CRE-REC 

 REC 

 EOC-REC 

 PEN-REC 

 PEN-REC 

 PEN-REC 

 ORD-REC 



ORD-REC 

 ORD-REC 

 SIL-REC 

 JUR-REC 

 DEV-REC 



DEV-REC 

 CAM-REC 

 CAM-REC 

 CAM-REC 

 ORD-CRE 

 MIS-REC 

 JUR-REC 



