Eastern Runningwater Fauna (Miocene of the United States)

Also known as UNSM Cr-23; UNSM Cr-129; UNSM Cr-130; UNSM Cr-135; UNSM Cr-137; UNSM Cr-160

Where: Cherry County, Nebraska (42.8° N, 102.0° W: paleocoordinates 43.5° N, 98.1° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Runningwater Formation, Early/Lower Hemingfordian (20.4 - 16.0 Ma)

• "early Hemingfordian"; "low-mid" part of formation

• member-level stratigraphic resolution

Environment/lithology: fluvial; sandstone and conglomerate

• "deposited by a large meandering river"
• "Fluvial lithofacies... predominantly epiclastic sand and gravel"

Size class: mesofossils

Reposited in the UNSM

Collection methods: bulk, sieve,

• "Most of the local faunas listed are the result of test-screening sand and gravel lenses and sorting between 45 and 136 kg of concentrate" (apparently at each site)

Primary reference: B. E. Bailey. 2004. Biostratigraphy and biochronology of early Arikareean through late Hemingfordian small mammal faunas from the Nebraska Panhandle and adjacent areas. Paludicola 4(3):81-113 [J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 69808: authorized by John Alroy, entered by John Alroy on 07.03.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• composite of six collections from isolated outcrops; some of this material comes from UNSM Cr-23 = Aletomeryx Quarry, but virtually all of it comprises small mammals and probably derives from new collections by Bailey, so I have not tried to separate out taxa that might belong to this collection
Show authors, comments, and common names
Mammalia
 Theriamorpha - Proscalopidae
Mesoscalops scopelotemos
Mesoscalops scopelotemos Reed 1960 placental
 Theriamorpha - Erinaceidae
Brachyerix macrotis, Parvericius montanus
Brachyerix macrotis Matthew 1933 hedgehog
Parvericius montanus Koerner 1940 hedgehog
 Lagomorpha - Ochotonidae
Oreolagus nebrascensis
Oreolagus nebrascensis McGrew 1941 pika
 Lagomorpha - Leporidae
Archaeolagus sp.
Archaeolagus sp. Dice 1917 rabbit
 Rodentia - Mylagaulidae
Mesogaulus paniensis
Mesogaulus paniensis Matthew 1902 rodent
 Rodentia - Sciuridae
Protospermophilus sp., Miospermophilus sp.
Protospermophilus sp. Gazin 1930 squirrel
Miospermophilus sp. Black 1963 squirrel
 Rodentia - Florentiamyidae
Fanimus ultimus
Fanimus ultimus Korth et al. 1990 rodent
 Rodentia - Heteromyidae
Stratimus strobeli, Harrymys magnus, Mookomys sp., Schizodontomys amnicolus, Proheteromys sp.
Stratimus strobeli Korth et al. 1990 rodent
Harrymys magnus Wood 1932 rodent
Mookomys sp. Wood 1931 rodent
Schizodontomys amnicolus Korth et al. 1990 rodent
Proheteromys sp. Wood 1932 rodent
 Rodentia - Geomyidae
Pleurolicus hemingfordensis
Pleurolicus hemingfordensis Korth et al. 1990 pocket gopher
 Rodentia - Castoridae
Euroxenomys wilsoni, Anchitheriomyinae indet.
Euroxenomys wilsoni Korth 2001 beaver
Anchitheriomyinae indet. Korth 2001 beaver
 Rodentia - Zapodidae
Schaubeumys grangeri, "Plesiosminthus clivosus" = Schaubeumys clivosus
Schaubeumys grangeri Wood 1935 jumping mouse
"Plesiosminthus clivosus" = Schaubeumys clivosus Galbreath 1953 jumping mouse
 Rodentia - Entoptychidae
Ziamys hugeni
Ziamys hugeni Korth et al. 1990 rodent