Phylum Mollusca

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Phylum Mollusca by Mind Map: Phylum Mollusca

1. Polyplacophora (Chiton)

1.1. Body: Oval Animals, 2-8 centimeters long

1.2. How and What it Eats: Have rasp-like mouth parts to remove algae from rocks

1.3. Movement: Chitons move slowly and gradually by waves called 'pedal waves'

1.4. Picture:

2. Cephalopoda

2.1. Body: Characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles (muscular hydrostats) modified from the primitive molluscan foot

2.2. How and What it Eats: Has a twp-part beak. They feed by capturing prey with their tentacles, drawing it into their mouth and taking bites from it.

2.3. Movement: Move by creeping, swimming with specialized fins and by squirting jets of water from an interior cavity.

2.4. Picture:

3. Bivalvia

3.1. Body: Two halves to the shell

3.2. How and What it Eats: Suspension feeders

3.3. Movement: Most burrow into the sand

3.4. Picture:

4. Gastropoda

4.1. Body: Largest of classes. Shell has 3 layers. Outer fibrous to distribute shock. Middle-strong crystalline calcium carbonate for strength. Inner-smooth calcium carbonate to provide a nonabrasive surface.

4.2. How and What it Eats: Grazers and suspension feeders

4.3. Movement: Like a snail

4.4. Picture: