b112_Lecture_33b

b112_Lecture_33b - Phylum Mollusca 150,000+ species, mostly...

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Phylum Mollusca 150,000+ species, mostly marine, some aquatic or terrestrial Most have a hard calcium carbonate shell Includes shellfish, snails, slugs, squids and octopuses, all having a common body plan Larval planktonic stage called trochophore in marine mollusks 8 Classes
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Class Polyplecophora – Chitons Entirely marine Shell composed of eight plates, mantle sometimes covering shell. Foot used for locomotion Head reduced, radula present Grazers
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Tonicella lineata – Lined Chiton
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Katharina tunicata – Leather Chiton
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Cryptochiton Gumboot Chiton
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Class Gastropoda 40,000+ species Asymmetrical body, torsion. Coiled shell in most Foot for locomotion Radula Herbivores (grazers) or predators
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Littorina sp - Periwinkle
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Cypraea – Cowries
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Conus pennaceus – Cone Shell
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Collisella – Limpets
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Trinchesia cocochroma – Brown Aeolid
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Hermissenda crassicornis – Glowing Nudibranch
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Haplotrema sportella – Land Snail
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Banana Slug
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Class Bivalvia
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b112_Lecture_33b - Phylum Mollusca 150,000+ species, mostly...

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