title: A New Specimen of the Controversial Chasmosaurine Torosaurus latus (Dinosauria: Ceratopsidae) from the Upper Cretaceous Hell Creek Formation of Montana.
abstract: Torosaurus latus is an uncommon and contentious taxon of chasmosaurine ceratopsid known from several upper Maastrichtian units in western North America. We describe a partial parietal of To. latus from the Hell Creek Formation of Montana. Although the specimen's ontogenetic maturity means that it cannot inform the ongoing debate over whether To. latus is the old adult form of the contemporary Triceratops, the specimen is one of the best-preserved To. latus parietals and supplements previous descriptions.
authors.affiliation: Earth Sciences, Saint Louis Science Center, Saint Louis, Missouri, United States of America.
authors.forename: Andrew T
authors.initials: AT
authors.lastname: McDonald
authors.affiliation: Geology, St. Louis Community College-Meramec, Saint Louis, Missouri, United States of America.
authors.forename: Carl E
authors.initials: CE
authors.lastname: Campbell
authors.affiliation: Earth Sciences, Saint Louis Science Center, Saint Louis, Missouri, United States of America.
authors.forename: Brian
authors.initials: B
authors.lastname: Thomas
mesh_terms: D000818:Animals; D025061:Dinosaurs / Q000033:anatomy & histology*; D009009:Montana; D010296:Parietal Lobe / Q000033:anatomy & histology; D012886:Skull / Q000033:anatomy & histology