4/15/15 1 A Survey of Marine Animal Kingdoms Mollusks --- A Bag, a Scraper, and a Foot • Phylum Mollusca characteristics – Mantle: muscular bag circulates water – Foot: beneath the head used for crawling by snails or propulsion by squid, octopuses – Radula: rough, scraping teeth (except bivalves) Classes: gastropoda (snails, whelks), bivalvia (clams, scallops), cephalopoda (octopuses, squid, cuttlefish) Gastropods They make up over 2/3 of all the Mollusk species. Gastropod means “stomach foot”. Snails and Nudibranchs are the most common Gastropods.
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Mollusks --- A Bag, a Scraper, and a Foot€¦ · Mollusks --- A Bag, a Scraper, and a Foot • Phylum Mollusca characteristics – Mantle: muscular bag circulates water – Foot:
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4/15/15
1
A Survey of Marine Animal Kingdoms
Mollusks --- A Bag, a Scraper, and a Foot • Phylum Mollusca
characteristics – Mantle: muscular bag
circulates water – Foot: beneath the
head used for crawling by snails or propulsion by squid, octopuses