Browsing by Subject "Megalonyx"

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    Late Hemphilian Mammals of the Ocote Local Fauna, Guanajuato, Mexico
    (Texas Memorial Museum, The University of Texas at Austin, 1980-02) Dalquest, Walter W.; Mooser, Osawaldo
    The Ocote local fauna is described from several thousand fossils, mostly isolated teeth, of large mammals, obtained from sediments near the village of Los Rodriguez, District of San Miguel de Allende, northeast of the city of San Miguel de Allende, Guanajuato, Mexico. Teleoceras ocotensis, Desrnathyus brachydontus, and Palaeolama guanajuatensis are described as new, the name Paenemarmota Mexicana (Wilson) is revived, and descriptions of the dentitions of six species of horses are given. It is suggested that the Pliocene evolution of Desrnathyus and Palaeolama took place on the Mexican Plateau. The evolutionary stage of the Ocote mammals suggests that the fauna is of late Hemphillian age.
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    Red Light Local Fauna (Blancan) of the Love Formation, Southeastern Hudspeth County, Texas
    (Texas Memorial Museum, The University of Texas at Austin, 1970-02) Akersten, William A.
    Two new formations in the Red Light Bolson have yielded vertebrate fossils. The Red Light local fauna consists of thirty taxa of mammals and numerous lower vertebrates from fluvial deposits. The much smaller Aguila local fauna is from older playa deposits. The stratigraphic and faunal successions indicate a climatic change from arid playa conditions to moist fluvial conditions. This change is probably a result of the onset of pluvial conditions related to glaciation at higher latitudes. At the time that the youngest part of the Red Light local fauna lived, the bolson was occupied by a permanent, flowing drainage and three major terrestrial environments probably existed in the area. Brush or succulent vegetation grew along the drainage, a savannah with scattered trees existed between the drainage and the mountains, and the mountains were largely covered with brush. The playa and fluvial deposits are correlated with the Fort Hancock and Camp Rice Formations, respectively, in the Hueco Bolson. The Red Light local fauna correlates with the Hudspeth local fauna from the Hueco Bolson. Faunal evidence indicates that it lived during the Pleistocene portion of the Blancan and, from stratigraphic evidence, this is narrowed to the Nebraskan.