Nipple Butte Quarry ( of the United States)

Also known as Mo-104, in part

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

• coordinate based on political unit

• small collection-level geographic resolution

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

• Unit A

Environment/lithology: terrestrial

Primary reference: C. C. Swisher. 1982. Stratigraphy and biostratigraphy of the eastem portion of the Wildcat Ridge, westem Nebraska 1-172 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 17567: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

 Rodentia - Cricetidae
Geringia mcgregori Macdonald 1970 mouse
"A": probably includes specimen of "Paciculus nebraskensis" from "Mo-104" of L. Martin 1980a, said by Korth 1992a to be "Geringia, or a new cricetid"; according to Swisher, "Most of the specimens referred to Paciculus by Martin (1980) are referrable to Geringia."
Eumys brachyodus Wood 1937 mouse
Leidymys blacki Macdonald 1963 mouse
 Rodentia - Florentiamyidae
Sanctimus stuartae Macdonald 1970 rodent
 Rodentia - Heteromyidae
"Proheteromys fedti" = Proharrymys fedti
"Proheteromys fedti" = Proharrymys fedti Macdonald 1963 rodent
 Rodentia - Castoridae
Palaeocastor sp. Leidy 1869 beaver
 Rodentia - Zetamyidae
Zetamys nebraskensis Martin 1974 caviomorph
 Lagomorpha - Leporidae
Palaeolagus philoi Dawson 1958 rabbit
Palaeolagus hypsodus Schlaikjer 1935 rabbit
 Tribosphenida - Proscalopidae
Proscalops tertius Reed 1961 placental
 Theriiformes - Peradectidae
Nanodelphys sp. McGrew 1937 metatherian
said to be new
 Theriiformes - Herpetotheriidae
Herpetotherium youngi McGrew 1937 marsupial