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The Sam Noble Museum at The University of Oklahoma inspires minds to understand the world through collection-based research, interpretation, and education.

Oklahoma’s Museum of Natural History

Cretaceous sea urchins gallery

Home / Common Fossils of Oklahoma / Gallery / Cretaceous fossil gallery / Cretaceous sea urchins gallery
Sea Urchin fossil
Sea Urchin fossil
Pseudananchys completaOU 37388; Echinoid; Lower Cretaceous; Grayson Formation; Bryan County, Oklahoma; CC BY-NC-ND 4.0

Pseudananchys completa

Sea Urchin fossil
Sea Urchin fossil
Holectypus limitusOU 37201; Echinoid; Lower Cretaceous; Grayson Formation; Bryan County, Oklahoma; CC BY-NC-ND 4.0

Holectypus limitus

Sea Urchin fossil
Sea Urchin fossil
Macraster elegansOU 13999; Echinoid; Lower Cretaceous; Fort Worth member, Caddo Formation; Marshall County, Oklahoma; CC BY-NC-ND 4.0

Macraster elegans

Sea Urchin fossil
Sea Urchin fossil
Macraster denisonensisOU 28542; Echinoid; Lower Cretaceous; Duck Creek member, Caddo Formation; Marshall County, Oklahoma; CC BY-NC-ND 4.0

Macraster denisonensis

Sea Urchin fossil
Sea Urchin fossil
Holastes simplexOU 28318; Echinoid; Lower Cretaceous; Fort Worth member, Caddo Formation; Marshall County, Oklahoma; CC BY-NC-ND 4.0

Holastes simplex

Sea Urchin fossil
Sea Urchin fossil
Heteraster adkinsiOU 37288; Echinoid; Lower Cretaceous; Fort Worth member, Caddo Formation; Marshall County, Oklahoma; CC BY-NC-ND 4.0

Heteraster adkinsi

Sea Urchin fossil
Sea Urchin fossil
Hemiaster calviniOU 37410; Echinoid; Lower Cretaceous; Bennington Formation; Bryan County, Oklahoma; CC BY-NC-ND 4.0

Hemiaster calvini