Late Cretaceous dinosaurs from the Denver Basin, Colorado Author Kenneth Carpenter Department of Earth Sciences, Denver Museum of Nature & Science, 2001 Colorado Boulevard, Denver, CO 80205, U. S. A. Author D. Bruce Young Department of Earth Sciences, Denver Museum of Nature & Science, 2001 Colorado Boulevard, Denver, CO 80205, U. S. A. text Rocky Mountain Geology 2002 37 237 254 journal article 10.2113/gsrocky.37.2.237 41bd81a8-8d16-41cb-950f-8fab1660f845 3943081 Suborder THEROPODA Family ORNITHOMIMIDAE Omithomimus velox Figure 6 Material. — YPM 542 cotype left distal end of tibia, metatarsals II-IV, phalanges I-1-3, YPM 548 cotype metacarpals I—III (Denver Formation, Loc. 35); DMNH 33300 manus claw (Denver Formation, Loc. 19); UCM 3539 phalanx (Denver Formation; Loc. 27); UCM 47633 distal caudal (Denver Formation, Loc. 27); and USGS D902 manus claw (Denver Formation?; Loc. 15). Description and discussion. —The type material was briefly described by Marsh (1890; see also 1896a, 1896 b ), with additional comments about the taxon by Osborn (1916), Russell (1972) , and DeCourten and Russell (1985) . As a whole, the limb material is proportionally more gracile than other ornithomimids such as Garudimimus or even Struthiomimus. Additional specimens, primarily unguals, have been found elsewhere in the Denver Basin, but only from the Denver Formation. DMNH 33300 is a nearly complete ungual, 40 mm long.