phylum mollusca. there are 5 classes: class amphineura – chitons, 8 shells class gastropoda –...
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Phylum MolluscaPhylum Mollusca
There are 5 classes:There are 5 classes:
Class Amphineura – Chitons, 8 shellsClass Gastropoda – ‘Stomach foot’Class Bivalvia – 2 valves/shellsClass Scaphopoda – ‘tooth-shaped’ shellsClass Cephalopoda – ‘head attached to foot’
All members of the Phylum All members of the Phylum Mollusca have:Mollusca have:
Muscular footMantleShell
Visceral Mass
Class AmphineuraClass AmphineuraChitonsChitons
Have 8 shells This diagram – dorsal
surface
Ventral muscular surfaceVentral muscular surface
Muscular portion: foot
Class GastropodaClass Gastropoda
‘Stomach-foot” Movement done on
‘muscular foot’
Class Gastropoda - SnailsClass Gastropoda - Snails
Snail DiagramSnail Diagram
Gastropods - Sea Gastropods - Sea slugs/nudibranchsslugs/nudibranchs
Class BivalviaClass Bivalvia
2 shells Clams Oysters Mussels
Typical Shell/ValveTypical Shell/Valve
Class ScaphopodaClass Scaphopoda
Tooth or tusk shaped shells
Scaphopoda DiagramScaphopoda Diagram
Class CephalopodaClass Cephalopoda
Cephalopods have a ‘head’Cephalopods have a ‘head’
Cephalopods include:Cephalopods include:
Octopi Squid Cuttlefish Nautiluses
Have internal shells Swim with jet
propulsion