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: Brushy Basin Member (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

Actinopterygii indet.3 ray-finned fish
 Testudines - Pleurosternidae
cf. Glyptops sp.1 Marsh 1890 turtle
Glyptops plicatulus4 Cope 1877 turtle
USNM 5458
 Saurischia - Diplodocidae
Diplodocus sp.6 Marsh 1878 diplodocine
 Saurischia - Camarasauridae
Camarasaurus sp.6 Cope 1877 camarasaurid
 Avetheropoda -
Allosauroidea indet.2 Currie and Zhao 1994 allosauroid
YPM VP 058268 right distal end of tibia
 Avetheropoda - Allosauridae
Allosaurus fragilis2, "Antrodemus sp." = Allosaurus6
Allosaurus fragilis2 Marsh 1877 allosaurid
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." = Allosaurus6 Marsh 1877 allosaurid
 Avetheropoda -
Coelurus sp.5 Marsh 1879 coelurosaur
 Avetheropoda - Coeluridae
"Coelurosauridae indet." = Coeluridae2
"Coelurosauridae indet." = Coeluridae2 Marsh 1881 coelurid
YPM VP (uncatalogued), left proximal humerus.
 Saurischia - Megalosauridae
Torvosaurus tanneri2 Galton and Jensen 1979 tetanuran
YPM VP 058269 a nearly complete left tibia that is missing the distal end.
 Saurischia - 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.
 Ornithischia - Stegosauridae
Stegosaurus ungulatus n. sp. Marsh 1879 ornithischian
YPM 1853
 Neornithischia -
Laosaurus sp.6 Marsh 1878 bird foot dinosaur
 Loricata - Goniopholididae
Goniopholis sp.6 Owen 1842 crocodilian
 Rhynchocephalia -
Opisthias sp.3 Gilmore 1909 rhynchocephalian
 Choristodera -
Cteniogenys sp.3 Gilmore 1928 choristodere