No Name ( of the United States)

Also known as Mo-105; One mile east of Birdcage Gap

Where: Morrill County, Nebraska (41.7° N, 103.1° W: paleocoordinates 42.6° N, 97.3° W)

• coordinate based on political unit

When: Brown Siltstone Member (Brule Formation), Arikareean (30.8 - 20.4 Ma)

• Unit A

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: C. C. Swisher. 1982. Stratigraphy and biostratigraphy of the eastern portion of the Wildcat Ridge, western Nebraska. 1-172 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 17568: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• a.k.a. Horn Member of Brule Formation
Mammalia
 Carnivora - Canidae
Archaeocyon leptodus Schlaikjer 1935 bone-crushing dog
"One mi east of Birdcage Gap (UNSM loc. Mo-105)"; 10 ft above base of member
 Perissodactyla - Equidae
Miohippus cf. intermedius Osborn and Wortman 1895 anchitheriine horse
 Perissodactyla - Rhinocerotidae
? Subhyracodon sp. Wood 1927 rhinoceros
 Artiodactyla - Camelidae
Miotylopus brachygnathus camel
repeats misspelling of McKenna and Love 1972
 Artiodactyla - Merycoidodontidae
"Pseudocyclopidius major" = Leptauchenia major, "Hadroleptauchenia shanafeltae" = Leptauchenia major, "Sespia marianae" = Sespia nitida
"Pseudocyclopidius major" = Leptauchenia major Leidy 1856 oreodont
from UNSM Mo-105, lower Gering
"Hadroleptauchenia shanafeltae" = Leptauchenia major Leidy 1856 oreodont
from UNSM Mo-105, lower Gering
"Sespia marianae" = Sespia nitida Leidy 1869 oreodont
UNSM Mo-105, lower Gering
 Rodentia - Sciuridae
Protospermophilus sp. Gazin 1930 squirrel
said to be new
 Rodentia - Cricetidae
Geringia mcgregori Macdonald 1970 mouse
"A"
 Rodentia - Florentiamyidae
Sanctimus stuartae Macdonald 1970 rodent
 Theriamorpha - Herpetotheriidae
"Peratherium spindleri" = Herpetotherium youngi
"Peratherium spindleri" = Herpetotherium youngi McGrew 1937 marsupial