Phylum Mollusca

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Class Gastropoda Subclass Prosobranchia Subclass Opisthobranchia Subclass Pulmonata
Class Gastropoda Subclass Prosobranchia • aquatic snails (marine and freshwater) • have undergone torsion and most have undergone shell coiling • have gills • all have shells • use radula for feeding; can be herbivores, carnivores, or detritivores In some, mantle extends over shell
Page 1 and 2: acoelomate Platyhelminthes Nematoda
Page 3 and 4: Mollusca Characteristics Body Plan
Page 5 and 6: Digestive gland Mouth Shell Mantle
Page 7 and 8: odontophore retractor radula protra
Page 9 and 10: Mollusca Characteristics Digestive
Page 11 and 12: Mollusca Characteristics Gas Exchan
Page 13 and 14: Excretion Mollusca Characteristics
Page 15 and 16: Mollusca Characteristics Reproducti
Page 17 and 18: Glochidia: larval bivalves that are
Page 19 and 20: Some species place their larva in a
Page 21 and 22: Digestive gland Mouth Shell Mantle
Page 23 and 24: Phylum Mollusca Class Gastropoda Cl
Page 25 and 26: Torsion • twisting of the viscera
Page 27: Planospiral shell Coiling Apex of s
Page 31 and 32: Class Gastropoda Subclass Opisthobr
Page 37 and 38: Class Gastropoda Subclass Pulmonata
Page 39 and 40: Class Bivalvia • clams, mussels,
Page 41 and 42: mouth foot labial palps gills excur
Page 43: Zebra Mussels: Dreissena polymorpha
Page 47 and 48: Richard E. Young, Michael Vecchione
Page 49 and 50: Class Cephalopoda Nautilus: • hav
Page 51 and 52: Class Cephalopoda Octopus: • have
Page 53 and 54: Class Cephalopoda • the largest g
Page 55 and 56: girdle plates Class Polyplacophora
Page 57: Class Scaphopoda • shell is modif

Phylum Mollusca

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