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Published byXzavier Beaumont Modified over 10 years ago
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Mollusca
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Basic Body Plan Muscular foot Gills Mantle – may secrete a shell Visceral mass Many have a scraping Radula Trochophore larvae
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Molluscan Body Plan
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Molluscan Classes Amphineurea (Polyplacophora) – Chitons Bivalvia (Pelecypoda) Cepahlopoda Gastropoda Phylum also include rarer classes (not covered in lab) Monoplacophora Scaphopoda
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Mollusca Evolution
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Chitons Eight Plates hinged together underneath skin Dorsally flattened Scrape algae off rocks with radula Marine
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Gumboot Chiton
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Bivalvia Mantle split in two- making two hinged shells Suspension feeders Incurrent- excurrent siphons bring water in /out Gills and palps collect and move particles to mouth
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Fresh water Larvae- Glochidia #44
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Clam Anatomy
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Intestine Heart Mantle Visceral mass Gills Foot #41
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Clam Gill # 42
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Radula #40
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Clam Dissection Gills
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Incurrent Siphon Excurrent Siphon
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Heart- Open Circ. System Pericardial cavity (Ceolom)
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Cephalopoda
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Gastropoda
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