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Animal Diversity - year 2 > Phylum Mollusca > Flashcards

Flashcards in Phylum Mollusca Deck (10)
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1
Q

what are the 4 classes within Mollusca?

A

1) gastropoda
2) polyplacophora
3) bivalvia
4) Cephalopoda

2
Q

what are the gastropods?

A

snails, slugs, limpets

3
Q

describe a common feature of gastropods

A

large muscular foot

4
Q

how many tentacles do gastropods have?

A

one or two pairs

5
Q

what is different about sea slugs?

A

they have no shell and external structures are used for gas exchange

6
Q

describe polyplacopohora (chitons)

A
  • segmented

- backs are protected by calcareous plates

7
Q

what are in the class bivalvia?

A

clams, mussels and scallops

8
Q

what defines the bivalves?

A

shell has two parts hinged by a ligament along the back

9
Q

what are in the class Cephalopoda?

A

squid, cuttlefish and octopus

10
Q

describe cephalopods

A
  • large heads
  • mouth surrounded by tentacles
  • sometimes have suckers