St. Mary River Formation (Montana) (Cretaceous of the United States)

Where: Glacier County, Montana (48.9° N, 112.8° W: paleocoordinates 56.7° N, 86.0° W)

• coordinate based on political unit

When: St. Mary River Formation, Edmontonian (70.6 - 66.0 Ma)

Environment/lithology: terrestrial

Primary reference: R. E. Heinrich, J. P. Hunter, and D. B. Weishampel. 1998. Mammals from the St. Mary River formation (Upper Cretaceous), Montana: New insights on an 'Edmontonian' land mammal age. Journal of Vertebrate Paleontology 18(3):50A [J. Alroy/J. Alroy/J. Ju]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 14503: authorized by John Alroy, entered by John Alroy on 21.09.1999, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

• county assignment based on assumption that locality is near Montanaceratops cerorhynchus locality discussed by Sloan and Russell 1974

•mammals are associated with a hadrosaurid nesting horizon

Show authors, comments, and common names
Amphibia
 Temnospondyli - Albanerpetontidae
Albanerpetontidae indet.2
Albanerpetontidae indet.2 Fox and Naylor 1982 tetrapod
Mammalia
 Multituberculata -
Ptilodontoidea indet.
Ptilodontoidea indet. multituberculate
size of smallest Mesodma and Cimexomys
 Multituberculata - Neoplagiaulacidae
Neoplagiaulacidae indet.
Neoplagiaulacidae indet. Ameghino 1890 multituberculate
said to be a new genus
 Multituberculata -
Paracimexomys cf. robisoni, Paracimexomys cf. priscus
Paracimexomys cf. robisoni Eaton and Nelson 1991 multituberculate
Paracimexomys cf. priscus Lillegraven 1969 multituberculate
 Theriamorpha - Pediomyidae
"Pediomys krejcii" = Leptalestes krejcii
"Pediomys krejcii" = Leptalestes krejcii Clemens 1966 metatherian
 Theriamorpha - Alphadontidae
Turgidodon sp.1
Turgidodon sp.1 Cifelli 1990 metatherian
Reptilia
 Ornithischia - Hadrosauridae
Hadrosauridae indet.
Hadrosauridae indet. Cope 1869 hadrosaurid
1Alroy 2002; 2Gardner 2000