Pediomys Point, Colville River (Cretaceous of the United States)

Where: North Slope County, Alaska (70.0° N, 151.6° W: paleocoordinates 82.3° N, 127.7° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Kogosukruk Tongue Member (Prince Creek Formation), Early/Lower Maastrichtian (70.6 - 66.0 Ma)

• possibly Edmontonian based on "radiometric age determinations (both K/Ar and 40Ar/39Ar)... at least 69 Ma old"

• bed-level stratigraphic resolution

Environment/lithology: coarse channel fill; pebbly, intraclastic sandstone

• "channel fillings... low gradient, low relief coastal plain" (Clemens 2003)

Size classes: macrofossils, mesofossils

Collected by W. Clemens, A. Fiorillo in 1988–1989, 1993, 2005–2007, 1009, 2012, 2014

Collection methods: bulk, sieve,

• "fauna was obtained by underwater screening" (Clemens 2003)

Primary reference: W. A. Clemens. 1991. A latest Cretaceous, high paleolatitude mammalian fauna from the North Slope of Alaska. In Z. Kielan-Jaworowska, N. Heintz, & H. A. Nakrem (eds.), Fifth Symposium on Mesozoic Terrestrial Ecosystems and Biota, Extended Abstracts. Contributions from the Paleontological Museum, Unviersity of Oslo 364:15-16 [M. Carrano/M. Carrano]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 14495: authorized by John Alroy, entered by John Alroy on 26.03.1995, edited by Matthew Carrano and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Gnathostomata
  -
Reptilia
 Dinosauria -
 Neornithischia - Thescelosauridae
Thescelosaurinae indet.1 Sternberg 1940 ornithischian
UAMES
 Theropoda - Dromaeosauridae
Saurornitholestinae indet.2 Longrich and Currie 2009 maniraptoran
DMNH 21183, anterior R dentary
Mammalia
 Theriamorpha - Gypsonictopidae
Sikuomys mikros4 Eberle et al. 2023 eutherian
said to "probably" be this genus
 Theriamorpha - Pediomyidae
Unnuakomys hutchisoni n. gen. n. sp.5
Unnuakomys hutchisoni n. gen. n. sp.5 Eberle et al. 2019 metatherian
 Multituberculata - Cimolodontidae
Cimolodon sp.3 Marsh 1889 multituberculate
"s.l."
Gnathostomata
  -
Chondrichthyes indet.3 Huxley 1880 cartilaginous fish