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BIO2135 – Animal Form and Function
Phylum Mollusca●Miller and Harley Chap. 11
BIO2135 – Animal Form and Function
Mollusca Phylogeny
Fig. 11.1
BIO2135 – Animal Form and Function
Lophotrochozoa PhylogenyFlat bodies
Platyzoa
Lophozoa
Trochozoa
BIO2135 – Animal Form and Function
Mollusca Taxonomy● Class Caudofoveata (150 sp.)
– Wormlike marine burrowers● Class Solenogastres (250 sp.)
– Wormlike marine surface dwellers
● Class Polyplacophora (950 sp.)– Flattened with dorsal segmented shell
● Class Monoplacophora (25 sp.)– Flattened with dorsal complete shell
● Class Gastropoda (35 000 sp.)– Coiled shell on a distorted body
● Class Cephalopoda (550 sp.)– Elongated body with tentacles and siphon
● Class Bivalvia (30 000 sp.)– Filter feeders in a hinged shell case
● Class Scaphopoda (300 sp.)– Elongated body in a tube shell
BIO2135 – Animal Form and Function
Mollusca Body PlanFig. 11.2
BIO2135 – Animal Form and Function
Mantle and Shell
Fig. 11.3
2
BIO2135 – Animal Form and Function
Radula
Fig. 11.4
BIO2135 – Animal Form and Function
Gastropod Torsion
Fig. 11.5
BIO2135 – Animal Form and Function
Shell Spiralling
BIO2135 – Animal Form and Function
Gastropod Anatomy
Fig. 11.6
BIO2135 – Animal Form and Function
Gastropod Copulation
BIO2135 – Animal Form and Function
Gastropod Respiration
Fig. 26.14
Fig. 11.7c
3
BIO2135 – Animal Form and Function
Bivalve Anatomy
Fig. 11.8 & 11.11
BIO2135 – Animal Form and Function
Bivalvia Burrowing
BIO2135 – Animal Form and Function
Bivalvia Burrowing
BIO2135 – Animal Form and Function
Bivalve Feeding and Respiration
Fig. 11.9
& 11.10
BIO2135 – Animal Form and Function
Bivalve Circulation
Fig. 11.12
BIO2135 – Animal Form and Function
Bivalve Reproduction
Fig. 11.13 & 11.14
4
BIO2135 – Animal Form and Function
Larval Stages
Fig. 10.2 & 11.13
BIO2135 – Animal Form and Function
CephalopodAnatomy
Fig. 11.13
BIO2135 – Animal Form and Function
Cephalopod Nervous System
Fig. 24.7 & 24.15
BIO2135 – Animal Form and Function
Cephalopoda Feeding
BIO2135 – Animal Form and Function
Cephalopod Locomotion
BIO2135 – Animal Form and Function
Cephalopod
•Chromatophores•Photophores
• Ink
5
BIO2135 – Animal Form and Function
Cryptic Camouflage
BIO2135 – Animal Form and Function
Next Class- Annelida● Miller and Harley Chap. 12
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