Quarry 1, Como Bluff (YPM) (Jurassic to of the United States)

Also known as WY-21

Where: Albany County, Wyoming (41.9° N, 106.0° W: paleocoordinates 37.5° N, 52.2° W)

• coordinate stated in text

• small collection-level geographic resolution

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

• referred to in paper as "Atlantosaurus Beds" and "Como Beds"; upper middle part of formation

• bed-level stratigraphic resolution

Environment/lithology: wet floodplain; claystone

• poorly drained floodplain

Size classes: macrofossils, mesofossils

Collected by W. Reed, Carlin, & Williston in 1877–1878, 1887; reposited in the YPM

Collection methods: quarrying, mechanical,

Primary reference: O. C. Marsh. 1877. Notice of new dinosaurian reptiles from the Jurassic formation. American Journal of Science and Arts 14:514-516 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 13212: authorized by Matthew Carrano, entered by Matthew Carrano on 29.01.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Saurischia - Diplodocidae
Diplodocus sp.4 Marsh 1878 diplodocine
 Saurischia - Camarasauridae
"Apatosaurus grandis n. sp." = Camarasaurus grandis, "Morosaurus impar n. gen. n. sp." = Camarasaurus grandis2, "Morosaurus robustus n. sp." = Camarasaurus grandis1, "Pleurocoelus montanus n. sp." = Camarasaurus grandis3
"Apatosaurus grandis n. sp." = Camarasaurus grandis Marsh 1877 camarasaurid
YPM 1901, 1903, 1905
"Morosaurus impar n. gen. n. sp." = Camarasaurus grandis2 Marsh 1877 camarasaurid
YPM 1900
"Morosaurus robustus n. sp." = Camarasaurus grandis1 Marsh 1877 camarasaurid
YPM 1902
"Pleurocoelus montanus n. sp." = Camarasaurus grandis3 Marsh 1877 camarasaurid
YPM 1908
 Avetheropoda - Allosauridae
"Creosaurus atrox n. gen. n. sp." = Allosaurus fragilis2
"Creosaurus atrox n. gen. n. sp." = Allosaurus fragilis2 Marsh 1877 allosaurid
YPM 1890
Mammalia
  -
Mammalia indet.4 Linnaeus 1758 mammal
tooth