Quarry 12, Como Bluff (YPM) (Jurassic to of the United States)

Also known as Robber's Roost, WY-29

Where: Carbon County, Wyoming (41.9° N, 106.1° W: paleocoordinates 37.5° N, 52.3° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Morrison Formation, Kimmeridgian to Kimmeridgian (157.3 - 145.0 Ma)

• upper middle part of formation

• bed-level stratigraphic resolution

Environment/lithology: wet floodplain; gray, silty, carbonaceous claystone

• poorly drained floodplain

Size class: macrofossils

Collected by W. Reed, A. Lakes, F. Brown, Beck, & Kessler in 1879-1886 ; reposited in the YPM

Collection methods: quarrying, mechanical,

• mostly worked by Arthur Lakes, 1879-1880; reopened by Brown, Beck & Kessler 1886

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

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 39370: authorized by Matthew Carrano, entered by Matthew Carrano on 27.05.2004, edited by Jonathan Tennant and David Nicholson

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Testudinata - Pleurosternidae
cf. Glyptops sp.1, Glyptops plicatulus4
cf. Glyptops sp.1 Marsh 1890 turtle
Glyptops plicatulus4 Cope 1877 turtle
USNM 5458
 Loricata - Goniopholididae
Goniopholis sp.6
Goniopholis sp.6 Owen 1842 crocodilian
 Ornithischia -
Laosaurus sp.6
Laosaurus sp.6 Marsh 1878 ornithopod
 Ornithischia - Stegosauridae
Stegosaurus ungulatus n. sp.
Stegosaurus ungulatus n. sp. Marsh 1879 ornithischian
YPM 1853
 Theropoda - Ceratosauridae
Fosterovenator churei n. gen. n. sp.2
Fosterovenator churei n. gen. n. sp.2 Dalman 2014 ceratosaur
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.
 Theropoda - Megalosauridae
Torvosaurus tanneri2
Torvosaurus tanneri2 Galton and Jensen 1979 tetanuran theropod
YPM VP 058269 a nearly complete left tibia that is missing the distal end.
 Theropoda -
Allosauroidea indet.2, "Antrodemus sp." = Allosaurus6, Allosaurus fragilis2
Allosauroidea indet.2 Currie and Zhao 1994 allosauroid
YPM VP 058268 right distal end of tibia
"Antrodemus sp." = Allosaurus6 Marsh 1877 allosauroid
Allosaurus fragilis2 Marsh 1877 allosauroid
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
 Theropoda - Coeluridae
"Coelurosauridae indet." = Coeluridae2
"Coelurosauridae indet." = Coeluridae2 Marsh 1881 coelurid
YPM VP (uncatalogued), left proximal humerus.
 Theropoda -
Coelurus sp.5
Coelurus sp.5 Marsh 1879 coelurosaur
tooth
 Saurischia - Camarasauridae
Camarasaurus sp.6
Camarasaurus sp.6 Cope 1877 camarasaurid
 Saurischia - Diplodocidae
Diplodocus sp.6
Diplodocus sp.6 Marsh 1878 diplodocine
 Eosuchia -
Opisthias sp.3
Opisthias sp.3 Gilmore 1909 lepidosaur
 Choristodera - Cteniogenyidae
Cteniogenys sp.3
Cteniogenys sp.3 Gilmore 1928 choristodere
Gnathostomata
  -
Actinopterygii indet.3
Actinopterygii indet.3 ray-finned fish
1Carpenter and Galton 2001; 2Dalman 2014; 3Foster 2003; 4Hay 1908; 5Ostrom 1980; 6Ostrom and McIntosh 1999