head of Willow Wash, SMP loc. 376a (Cretaceous of the United States)

Where: San Juan County, New Mexico (36.3° N, 108.2° W: paleocoordinates 43.5° N, 79.5° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: De-na-zin Member (Kirtland Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• lower part of De-na-zin member

• member-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

• none given

Size class: macrofossils

Reposited in the NMMNH

Primary reference: A. P. Hunt and S. G. Lucas. 1992. Stratigraphy, paleontology and age of the Fruitland and Kirtland formations (Upper Cretaceous), San Juan Basin, New Mexico. In S. G. Lucas, B. S. Kues, T. E. Williamson & A. P. Hunt (eds.), New Mexico Geological Society, 43rd Annual Fall Field Conference, San Juan Basin IV, Guidebook 43:217-239 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 36269: authorized by John Alroy, entered by John Alroy on 22.01.2004, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

• Pentaceratops sternbergii excluded because it probably equates with collection 34828 (see)
Reptilia
 Avetheropoda - Tyrannosauridae
aff. Albertosaurus sp.4 Osborn 1905 Alberta lizard
 Avetheropoda - Dromaeosauridae
cf. Saurornitholestes sp.4 Sues 1978 coelurosaur
 Ornithischia - Ankylosauridae
Ankylosauridae indet.4 Brown 1908 ornithischian
said to be a new genus
 Neornithischia - Hadrosauridae
Hadrosauridae indet.3 Cope 1869 hadrosaurid
SMP VP-2028, 2386
Naashoibitosaurus ostromi n. gen. n. sp.1 Hunt and Lucas 1993 hadrosaurine
NMMNH P-1041
 Crocodylia - Alligatoridae
Brachychampsa montana2 Gilmore 1911 crocodilian
SMP VP-1462