Cryptoblastus is a genus of extinct blastoids, a primitive group of echinoderms related to the modern sea lilies. Fossils are found in sedimentary rocks laid down in the Early Carboniferous period some 360 to 320 million years ago. ...
Found on
http://en.wikipedia.org/wiki/Cryptoblastus
extinct genus of blastoids, a primitive group of echinoderms related to the modern sea lilies, found as fossils in Early Carboniferous marine rocks ...
Found on
http://www.britannica.com/eb/a-z/c/164
No exact match found.
