This extinct species is known from the Middle Eocene, about 40-45 ma (Wagon Bed Formation, Uintan, Hot Springs County, Wyoming). What is unusual is that all of the bones are concentrated in a small area. This site of deposition is sandstone, and is interpreted as the shoreline of a calcium carbonate-rich lake in which the water was warm and shallow. The sample contained about 600 bones representing at least 19 individual frogs. The individual frogs seem to be young adults. Catastrophic death is thought to be the cause of mortality.
Henrici, A. C. 1991. Chelomophrynus bayi (Amphibia, Anura, Rhinophrynidae), a new genus and species from the Middle Eocene of Wyoming: Ontogeny and relationships. Ann. Carnegie Mus. 60(2):97-144.
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- First online 29 November 2008
- Content changed 29 November 2008
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Tree of Life Web Project. 2008. Chelomophrynus bayi. Version 29 November 2008 (under construction). http://tolweb.org/Chelomophrynus_bayi/17526/2008.11.29 in The Tree of Life Web Project, http://tolweb.org/