Natural Bridge (Oligocene of the United States)

Where: Alabama (34.1° N, 87.6° W: paleocoordinates 34.3° N, 81.0° W)

When: St. Stephens Formation, Early/Lower Oligocene (33.9 - 28.4 Ma)

Environment/lithology: marine; limestone

Size class: macrofossils

Primary reference: W. B. Clark and M. W. Twitchell. 1915. The Mesozoic and Cenozoic Echinodermata of the United States. United States Geological Survey Bulletin 54:1-341 [L. Villier/J. Millet/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 203475: authorized by Mark Uhen, entered by Mark Uhen on 16.08.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

 Cassiduloida - Cassidulidae
"Cassidulus (Pygorhynchus) alabamensis n. sp." = Cassidulus gouldii
"Cassidulus (Pygorhynchus) alabamensis n. sp." = Cassidulus gouldii Bouve 1846 sea urchin