Quarry 9, Pit A (AMNH/YPM) (Jurassic of the United States)

Where: Albany County, Wyoming (41.9° N, 106.0° W: paleocoordinates 37.7° N, 52.6° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Lake Como Member (Morrison Formation), Tithonian (152.1 - 145.0 Ma)

• about 80 feet below Morrison-Cloverly contact

• bed-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; gray claystone and lithified sandstone

• "variegated gray claystones and sandstones, with occasional chert lenses."

Size classes: macrofossils, mesofossils

Collected in 1968-1970; reposited in the AMNH, YPM

Collection methods: quarrying, mechanical, sieve,

Primary reference: D. R. Prothero. 1981. New Jurassic mammals from Como Bluff, Wyoming, and the interrelationships of non-tribosphenic Theria. Bulletin of the American Museum of Natural History 167(5):277-326 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 39426: authorized by Matthew Carrano, entered by Matthew Carrano on 28.05.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
  -
Bivalvia indet. Linnaeus 1758 clam
Mammalia
  -
Mammalia indet. Linnaeus 1758 mammal
 Theriamorpha -
 Theriamorpha - Dryolestidae
"Melanodon goodrichi" = Laolestes goodrichi Simpson 1929 mammal
Laolestes eminens Simpson 1927 mammal
Dryolestes priscus Marsh 1878 mammal
Amblotherium sp. Owen 1871 mammal
Amblotherium debilis Marsh 1881 mammal
Comotherium richi Prothero 1981 mammal
 Multituberculata - Plagiaulacidae
Plagiaulacidae indet. Gill 1872 multituberculate
 Eutriconodonta - Triconodontidae
Triconodontidae indet. Marsh 1887 mammal
Osteichthyes
 Docodonta - Docodontidae
Docodon victor Marsh 1880 dodocont
Reptilia
 Squamata - Paramacellodidae
Paramacellodus sp. Hoffstetter 1967 squamates
 Squamata - Dorsetisauridae
Dorsetisaurus sp. Hoffstetter 1967 squamates
 Testudinata - Pleurosternidae
Glyptops plicatulus Cope 1877 turtle
 Loricata - Goniopholididae
Goniopholis sp. Owen 1842 crocodilian
 Avetheropoda -
 Choristodera - Cteniogenyidae
Cteniogenys antiquus Gilmore 1928 choristodere
Amphibia
 Salientia -
Osteichthyes
 Halecomorphi - Ophiopsiidae
Ophiopsis sp. Agassiz 1834 ray-finned fish