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Lot 8303¤

Large Crinoid Plaque

Withdrawn
Amended
3 December 2006, 11:00 PST
Los Angeles

US$4,000 - US$6,000

Large Crinoid Plaque

Platycrinites saffordi
Catillocrinus sp.
Macrocrinus sp.
Mississippian
Crawfordsville, Indiana

Distinguished by the presence of two roots (circular bases, each with five arms), a large and impressive crinoid plaque also displays several sections of stems and five crowns (one from a juvenile.) Also known as Sea Lillies, crinoids belong to the invertebrate phylum Echinodermata, and have their own class, Crinoidea. Some species attach to the ocean floor by a root, a stem attaches the root to the crown, the crown has arms, and the arms have feather-like pinnules. These crinoids can move by manipulating the arms of the root. Crinoid forests swayed back and forth in the ocean currents. Crinoids are filter feeders, grabbing microscopic particles to feed on. Distant relatives include the starfish, brittle star, sea urchins, etc. Measures 21 x 15 x 3in

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