Click below for pages on molluscs:
Mollusca: molluscs
Monoplacophora: cap shells
Gastropoda: slugs and snails (further table of contents)
Bivalvia: bivalves
Opponobranchia: nut clams
Palaeoheterodonta: trigoniids and freshwater clams
Anomalodesmata: simple-hinged clams
Pteriomorphia: mussels, scallops and oysters
Heterodonta
Helcionellida
Rostroconchia: rostroconchs and tusk shells
Cephalopoda: cephalopods
Nautilosiphonata
Geisonoceratidae
Coleoidea: octopods and squid
Agoniatitaceae
Medlicottioidea