Unformatted text preview: 2. Equipped w/ two shells hinged dorsally and pulled together with adductor muscles. 3. Head and radula reduced 4. Filter Feeding through specialized appendages (palps) and gills 5. External Morphology pg. 18 6. Anatomy of visceral mass pg. 19 7. Circulatory system pg. 19 8. Locomotion, foot extends through soil to propel forward, pg. 20 • • Class CEPHALOPODA: squids, octopus 1. ~600 marine species 2. 2 subclasses: Nautiloidea (shell retained) and Coleoidea (shell reduced) 3. Foot modified to tentacles 4. Anterior tentacles modified to pincer fangs in mouth regions 5. Locomotion by walking or jet propulsion 6. Exceptionally well developed visual organs 7. Octopus can change body coloration Coleoidea- 2 tentacles, 8 arms 1. Study anatomy on pg. 23...
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- Spring '10
- mantle cavity, Coleoidea, visceral mass pg, External Morphology pg, Flattened oval body