A giant crocodylomorph from the Upper Triassic of New Mexico |
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| Authors: | Sterling J Nesbitt Randall B Irmis Spencer G Lucas Adrian P Hunt |
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| Institution: | (1) Lamont-Doherty Earth Observatory, Columbia University, 61 Rt. 9W, 10964 Palisades, NY, U.S.A.;(2) American Museum of Natural History, Central Park West at 79th Street, 10024 New York, NY, U.S.A.;(3) University of California Museum of Paleontology and Department of Integrative Biology, 1101 Valley Life Sciences Building, 94720-4780 Berkeley, CA, U.S.A.;(4) New Mexico Museum of Natural History, 1801 Mountain Road NW, 87104-1375 Albuquerque, NM |
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| Abstract: | A new genus and species of giant crocodylomorph from the Upper Triassic of New Mexico is described.Redondavenator quayensis n. gen. et n. sp. (Crocodylomorpha: Sphenosuchia) has a very long posterior process of the premaxilla that fits between the
nasal and the maxilla, and a long postglenoid process on the coracoid. These synapomorphies place it within the Crocodylomorpha.Redondavenator also has a System of grooves and pits that cover the anterior portions of the maxillae, the entire premaxillae, and the anterior
part of the nasal. Possible foramina among the network of grooves and pits on the anterior portion of the skull may represent
a rudimentary sensory System that is common to many extinct and ail extant crocodilians. Its exact phylogenetic position could
not be determined from the preserved material, but key characters suggest a phylogenetic position near the base of Sphenosuchia.
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| Keywords: | Crocodylomorpha Sphenosuchia Redondavenator Late Triassic sensory system gigantism |
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