Tuesday, November 24, 2009

Hemiaster whitei Fossil

A Hemiaster whitei sea urchin fossil found in Tarrant County, Texas. Goodland Formation was the location this fossil was located. The creature existed in the Lower Cretaceous Period (about 105 million years ago).

Thanks to Herb for the image.

1 comment:

LanceHall said...

The bottom one is the Hemiaster. The top one with the long sulcus (groove) would be a Heteraster (old name Epiaster if I recall correctly).