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Mollusks

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Title: PowerPoint Presentation Author: Michelle Miliefsky Last modified by: Michelle Smith Created Date: 1/31/2003 4:24:26 PM Document presentation format – PowerPoint PPT presentation

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Title: Mollusks


1
Mollusks
2
Phylogeny
Platyhelminthes
Porifera
Mollusca
Chordata
Arthropoda
Annelida
Cnideria
Nematoda
Echinodermata
pseudocoelom
segmentation
acoelom
Protostome schizocoelem
Deuterostomes eucoelom
radial symmetry
bilateral symmetry
true tissue
no true tissues
Ancestral Protist
3
Phylum Mollusca
Class Polyplacophora
Class Gastropoda
Class Bivalvia
Class Cephalopoda
chitons
Snails Sea slugs nudibranchs
Squid Octopus Cuttlefish Nautilus
clams
Class Scaphopoda
Tusk shells
More than 500,000 known species
4
(No Transcript)
5
Body Plan
  • Three main parts
  • Muscular foot- for movement
  • Visceral mass- contains most of the internal
    organs
  • Mantle cavity- houses gills

6
Generalized Mollusc Anatomy
mantle
visceral mass
foot
7
Feeding Types
  • Grazers (radula- scraping tongue)
  • Filter feeding
  • Egg eaters
  • Active predation

8
Kingdom Animalia Phylum Mollusca
9
Class Polyplacophora chiton

10
Class Scaphopoda tusk shell

11
Class Gastropoda Subclass Opisthobranchia
Spanish Dancer (nudibranch) egg mass
12
nudibranchsPhistella
Phylum Mollusca Class Gastropoda
13
nudibranchs
Nembrotha kubaryana
14
nudibranchs
Chromodoris annae
Halgerda batangas
Cuthona sp.
Chromodoris
15
Class Gastropoda
periwinkle
Opihi
Cowery
Cone snail
16
Epitomium
17
Tritons trumpet
18
pterapods
19
Class Bivalvia
20
oyster
21
Class Cephalopoda
Squid
22
Class Cephalopoda
http//www.youtube.com/watch?vU2s3C0lkQE0
http//www.youtube.com/watch?vNR53smpV_xg
23
Class Cephalopoda
Flamboyant cuttlefish
24
Class Cephalopoda
nautilus
25
Class Cephalopoda
octopus
26
Octopus Intelligence
http//www.youtube.com/watch?vGQwJXvlTWDw
Start at 2 minutes
27
Mimic octopus from Indonesia
flatfish
Sea snake
lionfish
http//www.youtube.com/watch?vH8oQBYw6xxc
28
Coconut
Dumbo

Amphioctopus marginatus

Vampire
29
Blue-ringed octopus
Highly venomous
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