Guardian Nature School Team Contact Blog Project Noah Facebook Project Noah Twitter

A global community of nature enthusiasts
photographing and learning about wildlife

Join Project Noah!
nature school apple icon

Project Noah Nature School visit nature school

Blastoid

Blastoidea

Description:

Blastoid refers to any member of an extinct class (Blastoidea) of echinoderms, animals related to the modern starfish and sea lilies, that existed from the Middle Ordovician to the Late Permian periods (from 472 million to 251 million years ago). Blastoids were sedentary animals anchored to the seafloor by a stemlike column of circular plates. Unlike other echinoderms, blastoids were characterized by a regularity of structure; the blastoid body region consisted of 13 plates of calcium carbonate, an external framework, or skeleton, arranged in 3 circles about the body. <excerpt from Encyclopaedia Britannica Mobile http://m.eb.com/topic/69078>

Notes:

Found near a quarry in the Cave-In-Rock, Illinois area.

Species ID Suggestions



Sign in to suggest organism ID

No Comments

BethAngermeier
Spotted by
BethAngermeier

Cave-In-Rock, Illinois, USA

Spotted on Jan 17, 2011
Submitted on Jun 17, 2012

Related Spottings

Fossil snail

Nearby Spottings

Common Daisy Great spangled fritillary Northern Pearly-Eye American Lady

Reference

Noah Guardians
Noah Sponsors

Join the Project Noah Team Join Project Noah Team