Quarry 12, Como Bluff (YPM): Kimmeridgian - Tithonian, Wyoming
collected by W. Reed, A. Lakes, F. Brown, Beck, & Kessler 1879-1886

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Stegosauridae
Stegosaurus ungulatus n. sp. Marsh 1879
1 individual
YPM 1853 (2 measurements)
Reptilia
Laosaurus sp. Marsh 1878
Ostrom and McIntosh 1999 1 individual
nomen dubium belonging to Ornithopoda
Reptilia - Ceratosauridae
Fosterovenator churei n. gen., n. sp. Dalman 2014
Dalman 2014 1 individual
YPM VP 058267A, B, C, a nearly complete right tibia with co-ossified astragalus. Paratype: YPM VP 058267D, complete right fibula of a much larger individual.
Reptilia - Coeluridae
Coelurosauridae indet. Cope 1882
Dalman 2014 1 individual
synonym of Coeluridae
YPM VP (uncatalogued), left proximal humerus.
Reptilia
Coelurus sp. Marsh 1879
Ostrom 1980 1 individual
tooth
Allosauroidea indet. Currie and Zhao 1994
Dalman 2014 1 individual
YPM VP 058268 right distal end of tibia
Allosaurus fragilis Marsh 1877
Dalman 2014
YPM VP 058258 right femur and proximal left tibia, YPM VP 058259 dorsal vertebra, YPM VP 058260 right lacrimal, right angular, left radius, and distal end of left fibula, YPM VP 058261 left ulna, YPM VP 058273 distal caudal vertebra, YPM VP 058275 distal end of right metatarsal M-III, YPM VP 058276 manual phalanx III-1, YPM VP 058277 ungual phalanx II-1
Antrodemus sp. Leidy 1873
Ostrom and McIntosh 1999 1 individual
synonym of Allosaurus
Reptilia - Megalosauridae
Torvosaurus tanneri Galton and Jensen 1979
Dalman 2014 1 individual
YPM VP 058269 a nearly complete left tibia that is missing the distal end.
Reptilia - Camarasauridae
Camarasaurus sp. Cope 1877
Ostrom and McIntosh 1999 1 individual
Reptilia
Diplodocus sp. Marsh 1878
Ostrom and McIntosh 1999 1 individual
Reptilia - Goniopholididae
Goniopholis sp. Owen 1842
Ostrom and McIntosh 1999 1 individual
Reptilia - Cteniogenyidae
Cteniogenys sp. Gilmore 1928
Foster 2003 1 individual
Reptilia
Opisthias sp. Gilmore 1909
Foster 2003
Reptilia - Pleurosternidae
Chelonia indet. (Latreille 1800)
Ostrom and McIntosh 1999 1 individual
    = cf. Glyptops sp. Marsh 1890
Carpenter and Galton 2001
Glyptops plicatulus (Cope 1877)
Hay 1908
nomen dubium belonging to Glyptops
USNM 5458
Actinopterygii
Actinopterygii indet. Cope 1887
Foster 2003
see common names

Geography
Country:United States State/province:Wyoming County:Carbon
Coordinates: 41.9° North, 106.1° West (view map)
Paleocoordinates:37.5° North, 52.3° West
Basis of coordinate:stated in text
Altitude:2061 meters
Geographic resolution:small collection
Time
Period:Jurassic Epoch:Late/Upper Jurassic
Key time interval:Kimmeridgian - Tithonian
Age range of interval:154.80000 - 145.00000 m.y. ago
Stratigraphy
Formation:Morrison
Stratigraphic resolution:bed
Stratigraphy comments: upper middle part of formation
Lithology and environment
Primary lithology:gray silty,carbonaceous claystone
Includes fossils?Y
Environment:wet floodplain
Geology comments: poorly drained floodplain
Taphonomy
Modes of preservation:body
Degree of concentration:concentrated
Size of fossils:macrofossils
Spatial orientation:random
Preservation of anatomical detail:good
Associated major elements:some
Disassociated major elements:some
Disassociated minor elements:some
Fragmentation:occasional
Collection methods and comments
Collection methods:selective quarrying,mechanical,field collection
Reason for describing collection:general faunal/floral analysis
Museum repositories:YPM
Collectors:W. Reed, A. Lakes, F. Brown, Beck, & Kessler Collection dates:1879-1886
Collection method comments: mostly worked by Arthur Lakes, 1879-1880; reopened by Brown, Beck & Kessler 1886
Metadata
Also known as:Robber's Roost, WY-29
Database number:39370
Authorizer:M. Carrano, D. Nicholson, P. Mannion Enterer:M. Carrano, D. Nicholson, J. Tennant
Modifier:M. Carrano Research group:vertebrate
Created:2004-05-27 06:13:38 Last modified:2023-08-23 15:46:43
Access level:the public Released:2004-05-27 06:13:38
Creative Commons license:CC BY
Reference information

Primary reference:
7814. O. C. Marsh. 1879. Notice of new Jurassic reptiles. American Journal of Science and Arts 18:501-505 [M. Carrano/M. Carrano/M. Carrano]

Secondary references:

17535ETE K. Carpenter and P. M. Galton. 2001. Othniel Charles Marsh and the myth of the eight-spiked Stegosaurus. In K. Carpenter (ed.), The Armored Dinosaurs. Indiana University Press, Bloomington 76-102 [M. Carrano/M. Carrano]
53863 S. G. Dalman. 2014. New data on small theropod dinosaurs from the Upper Jurassic Morrison Formation of Como Bluff, Wyoming, USA. Volumina Jurassica 12(2):181-196 [P. Mannion/J. Tennant]
15179ETE J. R. Foster. 2003. Paleoecological analysis of the vertebrate fauna of the Morrison Formation (Upper Jurassic), Rocky Mountain region, U.S.A. New Mexico Museum of Natural History and Science Bulletin 23:1-95 [M. Carrano/M. Carrano]
24821ETE P. M. Galton. 2007. Teeth of ornithischian dinosaurs (mostly Ornithopoda) from the Morrison Formation (Upper Jurassic) of the western United States. In K. Carpenter (ed.), Horns and Beaks: Ceratopsian and Ornithopod Dinosaurs 17-47 [M. Carrano/M. Carrano/M. Carrano]
76171 P. M. Galton. 2010. Species of plated dinosaur Stegosaurus (Morrison Formation, Late Jurassic) of western USA: new type species designation needed. Swiss Journal of Geosciences 103:187-198 [M. Carrano/M. Carrano]
58548 O. P. Hay. 1908. Descriptions of five species of North American fossil turtles, four of which are new. Proceedings of the United States National Museum 35:161-169 [D. Nicholson/D. Nicholson/D. Nicholson]
62949 E. Hennig. 1915. Fossilium Catalogus. I: Animalia. Pars 9: Stegosauria 1-16 [M. Carrano/M. Carrano/M. Carrano]
29301ETE S. C. R. Maidment, D. B. Norman, P. M. Barrett and P. Upchurch. 2008. Systematics and phylogeny of Stegosauria (Dinosauria: Ornithischia). Journal of Systematic Palaeontology 6(4):367-407 [M. Carrano/M. Carrano]
17150ETE J. H. Ostrom. 1980. Coelurus and Ornitholestes: are they the same?. In L. L. Jacobs (ed.), Aspects of Vertebrate History: Essays in Honor of Edwin Harris Colbert. Museum of Northern Arizona Press, Flagstaff 245-256 [M. Carrano/M. Carrano]
10618 J. H. Ostrom and J. S. McIntosh. 1999. Marsh's Dinosaurs: The Collections from Como Bluff. Yale University Press, New Haven 1-388 [M. Carrano/M. Carrano/M. Carrano]
13281ETE C. E. Turner and F. Peterson. 1999. Biostratigraphy of dinosaurs in the Upper Jurassic Morrison Formation of the Western Interior, U.S.A. In D. D. Gillette (ed.), Vertebrate Paleontology in Utah, Utah Geological Survey Miscellaneous Publication 99-1:77-114 [M. Carrano/M. Carrano/M. Carrano]