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Observations on a fossil fish from the Eocene beds of Wyoming
Author: Whitfield, R. P.
Year: 1890
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Freshwater stingrays of the Green River Formation of Wyoming (early Eocene), with the description of a new genus and species and an analysis of its phylogenetic relationships (Chondrichthyes: Myliobatiformes)
Author: Carvalho, Marcelo R. de; Maisey, John G.; Grande, Lance
Year: 2004
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