Lion Mountain High (Oligocene of the United States)

Also known as RAM V2016019, V2018039

Where: Montana (44.9° N, 111.8° W: paleocoordinates 46.3° N, 104.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Whitneyan (33.3 - 30.8 Ma)

• member-level stratigraphic resolution

Environment/lithology: fluvial; sandstone

Size classes: macrofossils, mesofossils

Primary reference: D. Lofgren, D. Hanneman, J. Bibbens, L. Gerken, F. Hu, A. Runkel, I. Kong, A. Tarakji, A. Helgeson, I. Gerard, R. Li, S. Li, and Z. Ji. 2020. Eocene and Oligocene mammals from the Gravelly Range of Southwest Montana. Paludicola 12(4):263-297 [B. Allen/B. Allen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 230863: authorized by Bethany Allen, entered by Bethany Allen on 24.07.2023

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Lagomorpha - Leporidae
Palaeolagus burkei Schlaikjer 1935 rabbit
AMNH 145508-9, 145512, 145514, 145519, RAM 18637
 Rodentia - Cricetidae
Eumys elegans Leidy 1856 mouse
AMNH 145511
Leidymys sp. Wood 1936 mouse
AMNH 145510
 Artiodactyla - Hypertragulidae
Hypertragulus calcaratus Cope 1873 ruminant
AMNH 145528
 Artiodactyla - Leptomerycidae
? Leptomeryx sp. Leidy 1853 ruminant
AMNH 145518
 Perissodactyla - Rhinocerotidae
Diceratherium tridactylum Osborn 1893 rhinoceros
AMNH 145520
 Carnivora - Canidae
Oxetocyon cuspidatus Green 1954 bone-crushing dog
AMNH 145515
 Theriamorpha - Geolabididae
Centetodon magnus Clark 1936 placental
RAM 25545
 Theriamorpha - Talpidae
? Talpidae indet. Fischer de Waldheim 1817 mole
AMNH 145513
 Theriamorpha - Peradectidae
"Nanodelphys cf. hunti" = Nanodelphys huntii
"Nanodelphys cf. hunti" = Nanodelphys huntii Cope 1873 marsupial
RAM 25531
 Theriamorpha - Herpetotheriidae
Herpetotherium fugax Cope 1873 marsupial
RAM 25532, AMNH 145516-7