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| teacher guide
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Modern
Crinoids
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11
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The
exhibit aquarium shows modern marine invertebrates who’s
relatives lived in Iowa’s Mississippian period, 350 million
years ago.
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Chambered
Nautilus
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Sea
Urchin (Spikes)
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Marine
Worm
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Feather
Star (crinoid)
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From
modern crinoids we observe that:
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Crinoids
eat plankton and live in areas where of plankton live.
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Crinoids
grow many arms in warm water, few arms in cool water.
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Crinoids
may be stationary or free moving.
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Crinoids
may live in concentrations on the ocean floor or as floating
mats.
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Crinoids
are colorful and Crinoids may regenerate lost parts.
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Crinoids
of the Mississippian period: Kinderhook Series, Hampton
Formation, Le Grand
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Taxocrinus
Intermedius |
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Rhodocrinus
Kirbyi Platycrinus Symmetricus |
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Dichocrinus |
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