- Echinocystitoida
"Echinocystitoida" were an order of extinct
echinoderm s in the subclass "Perischoechinoidea ".Reference
* [http://www.answers.com/topic/echinocystitoida Answers.com]
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Echinocystitoida
Look at other dictionaries:
Melonechinus — Temporal range: Carboniferous Scientific classification Kingdom: Animalia Phylum: Echinodermata Class … Wikipedia
Perischoechinoidea — Prionocidaris hawaiiensis … Wikipédia en Français
