North Horn Mountain (Cretaceous of the United States)

Where: Emery County, Utah (39.0° N, 111.0° W: paleocoordinates 46.8° N, 88.0° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: North Horn Formation, Lancian (70.6 - 66.0 Ma)

Environment/lithology: terrestrial

Primary reference: R. L. Cifelli, R. L. Nydam, J. G. Eaton, J. D. Gardner, and J. I. Kirkland. 1999. Vertebrate faunas of the North Horn Formation (Upper Cretaceous–Lower Paleocene), Emery and Sanpete counties. In D. D. Gillette (ed.), Vertebrate Paleontology in Utah. Utah Geological Survey Miscellaneous Publication 99-1:377-388 [J. Alroy/J. Alroy/M. Carrano]more details

PaleoDB collection 14599: authorized by John Alroy, entered by John Alroy on 19.05.2000, edited by Albert Garcia Selles, Katherine Magoulick and Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

• table says this is locality 2 on map, but text indicates it actually is locality 1 on map
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Reptilia
 Theropoda - Elongatoolithidae
Spongioolithus hirschi2
Spongioolithus hirschi2 Bray 1999 theropod
HEC 77
 Theropoda - Tyrannosauridae
Tyrannosauridae indet.3
Tyrannosauridae indet.3 Osborn 1906 tyrannosaurid
UMNH VP 11000
 Ornithischia - Ovaloolithidae
Ovaloolithus utahensis2
Ovaloolithus utahensis2 Bray 1999 ornithopod
HEC 880-1, 2, 3, 4
Mammalia
 Multituberculata - Neoplagiaulacidae
Mesodma cf. hensleighi
Mesodma cf. hensleighi Lillegraven 1969 multituberculate
 Multituberculata - Cimolomyidae
Cimolomys sp.
Cimolomys sp. Marsh 1889 multituberculate
 Multituberculata -
Paracimexomys sp.
Paracimexomys sp. Archibald 1982 multituberculate
 Theriamorpha -
Eutheria indet.
Eutheria indet. eutherian
 Eutheria -
Proteutheria indet.
Proteutheria indet. Romer 1966 eutherian
 Theriamorpha - Alphadontidae
Alphadon sp.
Alphadon sp. Simpson 1927 metatherian
one form compared to A. eatoni and another to A. sahnii
 Theriamorpha - Pediomyidae
Leptalestes sp.1
Leptalestes sp.1 Davis 2007 metatherian
compared to P. prokrejcii and P. krejcii
1Alroy 2007; 2Bray 1999; 3Paul et al. 2022