Reptilia - Ornithischia - Ceratopsidae
Alternative combinations: Arrhinoceratops utahensis, Triceratops utahensis
Full reference: C. W. Gilmore. 1946. Reptilian fauna of the North Horn Formation of central Utah. United States Department of the Interior Geological Survey Professional Paper 210-C:29-53
Belongs to Torosaurus according to P. J. Currie and E. B. Koppelhus 2014
See also Derstler 1994, Dodson and Currie 1990, Dodson et al. 2004, Farke 2011, Gilmore 1946, Hunt and Lehman 2008, Hunt and Lucas 1992, Kuhn 1964, Lawson 1976, Lehman 1981, Lehman 1987, Lehman 1990, Lehman 1996, Lehman et al. 2018, Longrich 2014, Longrich and Field 2012, Mallon et al. 2022, Sullivan et al. 2005, Tokaryk 1986, Tweet and Santucci 2018, Tyson 1981 and Wu et al. 2007
Sister taxon: Torosaurus latus
Type specimen: USNM 15583. Its type locality is west side, North Horn Mountain, which is in a Maastrichtian terrestrial horizon in the North Horn Formation of Utah.
Ecology: ground dwelling herbivore
Average measurements (in mm): femur circumference 376.0, humerus circumference 274.0
Estimated body mass: 3.98 tons based on femur circumference and humerus circumference
Distribution:
• Cretaceous of United States (3: Texas, Utah collections)
Total: 3 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.