Late Triassic vertebrates from the Dockum Formation near Otis Chalk, Howard County, Texas
— Spencer G. Lucas, Adrian P. Hunt, and Robert Kahle
Fossil vertebrates from the Otis Chalk area of Howard County, Texas represent a diverse fauna of fishes, amphibians and reptiles. These fossils are from the latan Member of the Upper Triassic Dockum Formation. The presence of the phytosaur Paleorhinus indicates a late Carnian (early Tuvalian) age for the vertebrate fauna.
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- Lucas, Spencer G.; Hunt, Adrian P.; Kahle, Robert, 1993, Late Triassic vertebrates from the Dockum Formation near Otis Chalk, Howard County, Texas, in: Carlsbad Region, New Mexico and West Texas, Love, David W.; Hawley, John W.; Kues, Barry S.; Adams, Jim W.; Austin, George S.; Barker, James M., New Mexico Geological Society, Guidebook, 44th Field Conference, pp. 237-244.