Classes of the Phylum (Division) Mollusca

Taxonomic information of, and a list of the classes within, the phylum (division); Mollusca including the number of families in each class

 

A Class is a taxonomic group of related biological units. There are a number of different classes (See list below). Until the early 18th Century, when its place was assumed by the taxonomic group Phylum, it used to be the highest level grouping in the taxonomic naming convention. Even today there are numerous differing opinions relating to its structure and constituent members and with the introduction of more modern naming and grouping systems has become of minor importance.

All higher order animals, including mammals, reptiles, birds and fish 

Phylum

Mollusca

Sub Phylum

Infra Phylum

Snails, squid, clam 

Classes of the Phylum Mollusca

Alphabetical list of orders within the class

This page displays the Classes within the selected Phylum: Mollusca. The number of entries in right-hand column indicates the number of Orders of each Class in the level below.

 

Super Class

Class

Subclass

Infraclass

Description

Orders

Aplacophora 

 

0

Aplacophora 

Chaetodermomorpha

 

0

Aplacophora 

4

bivalves

1

Bivalvia 

bivalves

2

Bivalvia 

bivalves

2

Bivalvia 

bivalves

2

Bivalvia 

bivalves

5

Cephalopoda 

 

octopuses

0

Cephalopoda 

octopuses

10

Cephalopoda 

octopuses

1

gastropods

16

Gastropoda 

gastropods

3

Gastropoda 

opisthobranchs

11

Gastropoda 

gastropods

5

tusk shells

4