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Stratigraphic range: Paleogene
|Region||Arkansas, Illinois, and Kentucky|
|Named by||Timothy Abbott Conrad|
- Conrad, T.A. (1847). "Observations on the Eocene formation, and descriptions of one hundred and five new fossils of that period, from the vicinity of Vicksburg, Mississippi, with an Appendix". Proceedings of the Academy of Natural Sciences of Philadelphia. 3: 280–282.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 22 June 2014.
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