5 km east of Burnham Trading Post (MNA) (Cretaceous of the United States)

Also known as Pentaceratops

Where: San Juan County, New Mexico (36.3° N, 108.2° W: paleocoordinates 43.6° N, 79.6° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Fossil Forest Member (Fruitland Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• upper part of formation; approx. 145 m above base of formation

• bed-level stratigraphic resolution

Environment/lithology: channel lag; fine-grained, medium, gray, white, carbonaceous sandstone and gray, yellow mudstone

• "stream point bar or channel bar"
• "This specimen was found in a 2 m thick lens of grayish-white, fine to medium grained, heterogenous, cross-bedded sandstone. Carbonized remains of palms, conifers, and deciduous angiosperms were found throughout the sandstone, with accumulations on cross-bedding planes. The sandstone grades laterally into and is interbedded with yellowish-gray mudstones, all of which make up a 6 m thick relatively weather resistant unit."

Size classes: macrofossils, mesofossils

Collected in 1977

Collection methods: quarrying, mechanical,

Primary reference: T. Rowe, E. H. Colbert, and J. D. Nations. 1981. The occurrence of Pentaceratops (Ornithischia: Ceratopsia) with a description of its frill. Advances in San Juan Basin Paleontology, S. G. Lucas, J. K. Rigby Jr., and B. S. Kues (eds.), University of New Mexico Press, Albuquerque 29-48 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 34826: authorized by Matthew Carrano, entered by Matthew Carrano on 03.10.2003, edited by John Alroy

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Ornithischia - Ceratopsidae
aff. Pentaceratops "n. sp."2
aff. Pentaceratops "n. sp."2 Osborn 1923 ceratopsid
MNA Pl. 1747
 Theropoda - Tyrannosauridae
? Albertosaurus sp.
? Albertosaurus sp. Osborn 1905 Alberta lizard
 Testudines - Trionychidae
Trionychidae indet.1
Trionychidae indet.1 Gray 1825 softshell turtle
Bivalvia
 Unionida - Unionidae
"Unio" sp.
"Unio" sp. Philipsson 1788 freshwater mussel
unclassified
  -
Coniferophyta indet.
Angiospermae
  -
Angiospermae indet.
 Mesangiosperms - Arecaceae
Arecaceae indet.
Arecaceae indet. von Berchtold and Presl 1820 palm
1Alroy 2006; 2Fowler and Freedman Fowler 2020