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32 Cards in this Set
- Front
- Back
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Radial Cleavage cell size
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Roughly the same
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Radial Cleavage stem cells
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totipotent
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Deuterostome in Radial Cleavage
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Mouth opens later
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Schizocoely
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Coelom forms by splitting of mesoderm (radial cleavage)
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Common features of radial cleavage animals
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Many without a well-developed head. Poor osmoregulators. Mostly marine.
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Lophophore
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Set of ciliated feeding tentacles
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Lophophorate features
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Mostly marine, sessile, not much of a head, u-shaped gut
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Bryozoa have no organs for…
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gas exchange, circulation, or excretion
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Bryozoa body coverings…
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gelatinous, proteinaceous, or calcified
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Plumatellid (Plylactolaemata colony)
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Common in rivers, creeks. Small zooids connected by stolon
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Lophopodid (Plylactolaemata colony)
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Common in ponds or lakes. Gelatinous Blob
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How can Phylactolaemata survive winter?
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Resting stages: statoblasts, brown bodies
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Class Stenolaemata
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Tubelike zooids, marine.
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Gymnolaemata body wall
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Gelatinous
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Ctenostomata
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Gymnolaemata. Soft branched. Wash ashore, common in northern Gulf of Mexico
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Cheilostomata are…
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Calcified |
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Cyphonautes (Cheilostomata larval type)
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Can last up to 6 months in plankton
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Cheilostomata larval types
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Cyphonautes and short-lived
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Autozooids
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Common feeding individuals
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Heterozooids
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Specialized individuals
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Avicularia (Heterozooid)
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Shaped like a bird beak. Clean colony or capture prey. Remove over-large or inedible particles
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Vibracula (Heterozooid)
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Shaped like fork. Sweep colony
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Ovicells (Heterozooid)
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Store fertilized eggs
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Bryozoans commonly settle on…
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docks, buoys, hulls, shells
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Phoronidea lophophore contains…
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hemoglobin from closed circulatory system
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How does Phoronidea move blood?
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Muscular contraction
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Branchiopoda have…
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calcified shell
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Foramen
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Shell opening for Branchiopoda
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Pedicle
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For stalk (Branchiopoda shell)
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Branchiopoda lophophore feature
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Fluid-filling canals and cartilage. Shell contains supports. Respiration
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Branchiopoda circulatory system
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Open. Metanephridia.
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Inarticulate facts
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Shells held together by muscles. Filter water through setae bundles. Complete digestive tract
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