Browsing by Subject "Amphibia"
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Item A comparative study of anuran chromosomes(1933) Hayes, Edwin Spencer; Painter, Theophilus S. (Theophilus Shickel), 1889-1969Item Carrolla craddocki: A New Genus and Species of Microsaur from the Lower Permian of Texas(Texas Memorial Museum, The University of Texas at Austin, 1986-04) Langston Jr., Wann; Olson, E.C.The specimen, comprising a skull and jaws, is assigned to the suborder Microbrachomorpha and tentatively to the family Brachystelechidae on the basis of the structure of the temporal and occipital regions. It is unique among known microsaurs in the possession of marginal teeth with long slender hollow bases and bifurcated crowns and the apparent absence of palatal dentition. Carrolla craddocki, new genus and species, from Lower Permian (Wolfcampian) Belle Plains Formation in Archer County, Texas, is described and figured. If correctly assigned to the Brachystelechidae, Carrolla is the first record of the family in North America, but it was probably not equivalent ecologically to the roughly contemporaneous Brachystelechus of Europe. Carrolla is believed to have been a burrower in hard soils. Its diet may have comprised soft-bodied subterranean invertebrates, but the functional significance which developed cryptic behavior under competitive pressures from surface dwelling reptiles in an increasingly harsh Early Permian environment in North America.Item A Mid-Pleistocene (Irvingtonian) Herpetofauna From a Cave in South Central Texas(Texas Memorial Museum, The University of Texas at Austin, 1987-03) Holman, J. Alan; Winkler, Alisa J.At least 24 species of amphibians and reptiles are identified from the mid-Pleistocene Fyllan Cave Fauna. Travis County, Texas. This is the largest mid-Pleistocene herpetofauna known from the Texas, and one of the largest mid-Pleistocene herpetofaunas known from the United States. Only the large terrestrial tortoise represent an extinct species, but three extralimital forms indicate that winters in the area were milder than they are today. The fossils appear to have been subjected to considerable post-mortem- transport