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32 Cards in this Set
- Front
- Back
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'Group of thread like structure made of collagen' |
Byssus |
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'Shallow indentation of hole, this means the byssus does not interfere with the opening and closing of valves' |
Byssal notch |
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'Calcerous substance secreted by the mantle which attaches the left valve to the substrate' |
Cement |
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'Part of the valve in contact with the substrate' |
Resting area |
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'Soft tissues that take in fresh water and remove waste water' |
Siphons |
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Bivalves can be fixed to the substrate via the...? |
Byssus |
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Bivalves feed using? |
Siphons |
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Inhalant siphons bring in what? |
Fresh water |
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Exhalant siphons remove what? |
Waste water |
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Burrowing bivalves have long what? |
Siphons |
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Vagrant bivalves move around using a? |
Muscular foot |
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Burrowers use what to burrow? |
Foot |
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Epifaunal bivalves have what to attach to the substrate? |
Byssus |
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Epifaunal bivalves have a shell covered in a layer of what? |
Periostractum |
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Why do Epifaunal bivalves have a shell covered in periostractum? |
Protect fro acidic water |
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Epifaunal bivalves have a strong what? |
Shell |
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Epifaunal bivalves have large what? |
Adductor muscles |
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Why do epifaunal bivalves have large adductor muscles? |
Close shell in low tide |
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'Describes the rounded large resting area so the bivalve doesn't sink' |
Snowshoe effect |
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How do cemented epifaunal bivalves have a cement? |
Attach to the hard substrate |
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Why do cemented epifaunal bivalves have a thick shell? |
Withstand high energy |
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An cemented epifaunal bivalve might have different size what? |
Shells |
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A free lying epifaunal bivalve may have a convex...? |
Left valve |
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A free lying epifaunal bivalve may have a small what? |
Right valve |
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Why do free lying bivalves have a small right valve? |
Stability Stop sinking |
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Why might a free lying epifaunal bivalve have a curved left valve? |
Increase surface area |
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Name a byssally attatched bivalve |
Mytilus |
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Name a cemented bivalve |
Ostrea |
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Name a free lying bivalve |
Gryphaea |
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What 5 features/adaptations do cemented bivalves take? |
Larger left valve Crenulated commisure Excreted cement Strong adductors Strong shell |
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What 4 adaptations/features do free lying bivalves show? |
Large curved left valve Small lid like right valve Spines Strong shell |
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Name the 5 adaptations/features of byssally attatched bivalves |
Periostractum covered shell Byssus Strong shell Large adductors Reduced anterior muscles and edge of shell |
