New Mexico Geological Society Annual Spring Meeting — Abstracts

Charles Sternberg, under the employ of Carl Wiman, collected numerous Late Cretaceous fossils from New Mexico in 1921 for the Paleontological Museum, University of Uppsala, Sweden. These specimens include the holotypes of the larnbeosaurine hadrosaur Parasaurolophus tubicen Wiman, 1931, the chasmasaurine ceratopsian Pentaceratops fenestratus Wiman, 1930, the goniopholid crocodylian Goniopholis kirtlandicus Wiman, 1932, and the trionychid turtle Platypeltis sternbergi Wiman, 1933, as well as numerous additional
specimens of turtles and dinosaurs. This collection has been described in part elsewhere and previous workers have noted the apparent lack of theropod specimens. A recent survey of this collection to be published (Sullivan and Williamson, in press) has revealed several previously undescribed theropod specimens. These specimens include isolated teeth, a tyrannosaurid dentary and dromaeosaur foot elements.

Isolated theropod teeth include a tooth of a small theropod, cf. Saurornitholestes and teeth ofa large tyrannosaurid, cf. Albertosaurus. The partial tyrannosaurid dentary is edentulous and is approximately 305 mm long and 105 mm in height. It preserves 7 interdental plates and the symphysis and is tentatively referred to Albertosaurus sp. Approximately 12 miscellaneous phalanges and phalangeal fragments include two pedal unguals. One ofthese is probably the ungual of digit II.