MOLLUSCA
Mollusca is divided into Chochifera &
Aplacophora
o
Chochifera
o We usually see this when travelling, in the
market, etc.
o Include Monoplacophra, Gastropoda, Bivalvia,
Scaphopoda, Cephalopoda
o
Other Characteristics include:
Single, well-defined shell gland
Periostracum, prismatic and nacreous layers
Shell univalve
Preoral tentacles