Cretaceous-Eocene crocodilians from the San Juan Basin, New Mexico
Spencer G. Lucas

Abstract:

Crocodilian fossils from the Fruitland, Kirtland, Nacimiento and San Jose Formations in the San Juan Basin (Upper Cretaceous–lower Eocene) represent the genera Akanthosuchus (Nacimiento Formation), Allognathosuchus (Nacimiento and San Jose Formations), Brachychampsa (Fruitland and Kirtland Formations), Diplocynodon (Nacimiento Formation), Goniopholis (Fruitland and Kirtland Formations), Leidvosuchus (Fruitland, Kirtland, Nacimiento and San Jose Formations) and Thoracosaurus? (Fruitland Formation). The San Juan Basin taxa document some evolutionary turnover in crocodilians at the Cretaceous-Tertiary boundary and suggest that the feeding ecology of extant crocodilians was present among the Late Cretaceous–early Eocene crocodilians.


Citation:

  1. Lucas, Spencer G., 1992, Cretaceous-Eocene crocodilians from the San Juan Basin, New Mexico, in: San Juan Basin IV, Lucas, Spencer, G.; Kues, Barry S.; Williamson, Thomas E.; Hunt, Adrian P., New Mexico Geological Society, Guidebook, 43rd Field Conference, pp. 257-264.

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