Fossil vertebrates have been described from the Paleocene of Big Bend National Park, Brewster County, Texas, by Wilson et al. (1952), Wilson (1967), Schiebout (1973, 1974), and Standhardt (1986). These studies focused on the mammalian component of the fauna, although crocodylian and chelonian remains are known. Schiebout (1973) referred a partial dentary to Diplocynodon. Teeth in the Black Peaks Formation were referred to Allognathosuchus by Straight (1996); Standardt (1986) discussed isolated crocodyliform teeth from across the Cretaceous-Tertiary Boundary in this area, but did not assign any of them to named taxa. Brochu...

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