TY - JOUR
T1 - Chasmosaurus Mariscalensis, sp. nov., a new ceratopsian dinosaur from Texas
AU - Lehman, Thomas M.
N1 - Funding Information:
the 1950s and first identified the ceratopsian as Chas-mosaurus. Thanks are due the officials of Big Bend National Park for their cooperation during the field-work for this project, and to the authorities of the Texas Memorial Museum, Centennial Museum, Yale Pea-body Museum, and National Museum of Natural History, for allowing me access to ceratopsian specimens in their collections. Some of the material described in this report was collected under Antiquities Act Permit numbers 73-TX-004, 74-TX-004, 75-TX-012, and 78- TX-091. This research was supported by grants from the Howard R. Lowe Vertebrate Paleontology Fund of the University of Texas Geology Foundation, the Sci- entific Research Society Sigma Xi, and Getty Oil. The Geosciences Department of Texas Tech University provided funds for publication. All drawings are the work of the author. This paper benefited from reviews by Peter Dodson, John Ostrom, and Wann Langston, Jr.
PY - 1989/6/30
Y1 - 1989/6/30
N2 - Chasmosaurus mariscalensis is a new species of ceratopsian dinosaur (Ornithischia; Ceratopsia) from the upper part of the Aguja Formation (late Campanian, Judithian) in Big Bend National Park, Brewster County, Texas. This species is distinguished from other species of Chasmosaurus by its relatively short and broad squamosal bearing six very large epoccipitals, maxilla without pronounced lateral shelf, premaxilla without posterodorsal extension, and very long supraorbital horncores in adults. A bone bed accumulation comprising disarticulated remains of 10-15 juvenile, subadult, and fully adult individuals forms the hypodigm of C. mariscalensis, and allows the first full description of the postcranial skeleton for the genus. Males and females are separated on the basis of brow horncore orientation. This is the most advanced species of Chasmosaurus and is morphologically intermediate with Pentaceratops in several characters.
AB - Chasmosaurus mariscalensis is a new species of ceratopsian dinosaur (Ornithischia; Ceratopsia) from the upper part of the Aguja Formation (late Campanian, Judithian) in Big Bend National Park, Brewster County, Texas. This species is distinguished from other species of Chasmosaurus by its relatively short and broad squamosal bearing six very large epoccipitals, maxilla without pronounced lateral shelf, premaxilla without posterodorsal extension, and very long supraorbital horncores in adults. A bone bed accumulation comprising disarticulated remains of 10-15 juvenile, subadult, and fully adult individuals forms the hypodigm of C. mariscalensis, and allows the first full description of the postcranial skeleton for the genus. Males and females are separated on the basis of brow horncore orientation. This is the most advanced species of Chasmosaurus and is morphologically intermediate with Pentaceratops in several characters.
UR - http://www.scopus.com/inward/record.url?scp=84895311959&partnerID=8YFLogxK
U2 - 10.1080/02724634.1989.10011749
DO - 10.1080/02724634.1989.10011749
M3 - Article
AN - SCOPUS:84895311959
SN - 0272-4634
VL - 9
SP - 137
EP - 162
JO - Journal of Vertebrate Paleontology
JF - Journal of Vertebrate Paleontology
IS - 2
ER -