Browsing by Subject "reptilia"
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Item Blancan Mammalian Fauna and Pleistocene Formations, Hudspeth County, Texas(Texas Memorial Museum, The University of Texas at Austin, 1966-02) Strain, William SamuelVertebrate fossils representing a new Blancan local fauna occur in the Fort Hancock Formation (new name) and the Camp Rice Formation (new name), Hueco Bolson (Fig. 1) Hudspeth County, Texas. Fossils indicate the Fort Hancock Formation and the lower part of the Camp Rice Formation are probably Aftonian in age. Pearlette volcanic ash dates the middle of the Camp Rice as late Kansan. It also provides a precise horizon for correlating the Pleistocene stratigraphic section of the Great Plains with that in the Hueco Bolson. The Fort Hancock Formation is composed of clay, silt, fine sand, and gypsum. Silt, sand, gravel, some clay, and volcanic ash characterize the Camp RiceFormation. An unconformity separates the formations. The Fort Hancock was deposited in a closed basin, but the Camp Rice represents fluvial and floodplain deposition by the Rio Grande after it developed as a through-flowing stream in the Hueco Bolson during late Kansan.Item Pararhabdodon Isonensis and Tsintaosaurus Spinorhinus: A New Clade of Lambeosaurine Hadrosaurids from Eurasia(2009-10) Prieto-Marquez, Aalbert; Wagner, Jonathan R.; Prieto-Marquez, AalbertWe present new anatomical information showing that Koutalisaurus kohlerorum, from the Maastrichtian of Lleida Province, northeastern Spain, is most probably the junior synonym of Pararhabdodon isonensis from the same region. Dentary and maxillary characters previously considered as autapomorphies of K. kohlerorum and P isonensis, respectively, are shown to be synapomorphies uniting the latter with Tsintaosaurus spinorhinus from the Campanian of the Wangshi Group, Shandong Province, China. This study provided conclusive evidence of the presence of the Lambeosaurinae in Europe. Tsintaosaurus spinorhinus and Pararhabdodon isonensis were inferred to form a clade of basal lambeosaurines characterized by a maxilla with an elevated articular facet for the jugal (continuous with the ectopterygoid ridge) and an extremely medially projected symphyseal region of the dentary. This clade originated in Asia during the middle or late Campanian. Pararhabdodon isonensis or its ancestors migrated from Asia to the Iberian island of the European archipelago. Reconstruction of ancestral areas by Fitch parsimony attributes the European occurrence of P isonensis to a single dispersal event from Asia no later than middle to late Campanian. (C) 2009 Elsevier Ltd. All rights reserved.