This MedLibrary.org supplementary page on Eocrinoidea is provided directly from the open source Wikipedia as a service to our readers. Please see the note below on authorship of this content, as well as the Wikipedia usage guidelines. To search for other content from our encyclopedia supplement, please use the form below:
Related Sponsors
| Eocrinoidea Fossil range: Cambrian - Silurian |
||||||||
|---|---|---|---|---|---|---|---|---|
 Eocrinoid holdfasts (Middle Ordovician, Utah)
 Colourful reconstruction of Gogia ojenai
|
||||||||
| Scientific classification | ||||||||
|
||||||||
| Excluded groups | ||||||||
Class Eocrinoidea ("dawn crinoids"). Eocrinoids existed between the Early Cambrian and Late Silurian periods. Class Eocrinoidea is the earliest known group of stalked,arm-bearing echinoderms. Eocrinoids were the most common echinoderms during the Cambrian. The eocrinoids were an experimental paraphyletic group within the echinoderms. The eocrinoids may have been ancestral to six other classes: Rhombifera, Diploporita, Coronoidea, Blastoidea, Parablastoidea, and Paracrinoidea. The earliest eocrinoids had a short holdfast and irregularly structured plates. Later forms had a fully developed stalk with regular rows of plates. The eocrinoids were sessile benthic suspension feeders. (Prothero,2004)
References
External links
- Palaeos on Eocrinoids
- Evolutionary palaeoecology of early epifaunal echinoderms: Response to ...
- Cambrian explosion with Eocrinoid information
- Prothero, D.R.,2004, Bringing Fossils to Life; An Introduction to Paleobiology (2 ed.):New York, The McGraw-Hill companies, p324
Wikipedia content modification information:
- This page was last modified on 25 November 2008, at 03:56.
Wikipedia Authorship and Review
Wikipedia content provided here is not reviewed directly by MedLibrary.org. Wikipedia content is authored by an open community of volunteers and is not produced by or in any way affiliated with MedLibrary.org.
Wikipedia Usage Guidelines
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article on "Eocrinoidea".
The URL for this specific entry is:
All Wikipedia text is available under the terms of the GNU Free Documentation License. (See Copyrights for details). Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc.