PBDB Collection

Stage Hill II ( of the United States)

Also known as UNSM Sf-105

Where: Scotts Bluff County, Nebraska (41.7° N, 103.7° W: paleocoordinates 42.6° N, 98.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Wildcat Hills Beds Formation (Arikaree Group), Harrisonian (24.8 - 18.5 Ma)

• "late late Arikareean" (= Harrisonian)

•"upper Arikaree Group"

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; conglomerate and bioturbated, fine-grained sandstone

• "high energy fluvial environment"

• "A one-meter thick lateral accretion gravel was the principal source of vertebrate remains; however, several well preserved mammal jaws were recovered from an overlying bioturbated fine-grained sandstone"

Size classes: macrofossils, mesofossils

Reposited in the UNSM

Collection methods: bulk, sieve,

• rock censused is "gravel concentrate," not the original sediment

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 17843: authorized by John Alroy, entered by John Alroy on 13.10.1999, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• "fish, rare with low diversity; reptiles, frequent with moderate diversity; birds, rare; and mammals, common with high diversity. No identifiable amphibian remains..."

•fauna briefly mentioned by Bailey 1999; all details are from Bailey 2004

Show authors, comments, and common names

Mammalia
Theriamorpha - Herpetotheriidae	Herpetotherium youngi Herpetotherium youngi McGrew 1937 marsupial
Artiodactyla - Anthracotheriidae	Arretotherium acridens Arretotherium acridens Douglass 1902 anthracothere
Artiodactyla - Merycoidodontidae	"Merychyus cf. siouxensis" = Paramerychyus harrisonensis "Merychyus cf. siouxensis" = Paramerychyus harrisonensis Peterson 1907 oreodont
Artiodactyla - Moschidae	Pseudoblastomeryx advena² Pseudoblastomeryx advena² Matthew 1907 musk deer
Artiodactyla - Palaeomerycidae	Barbouromeryx sp. Barbouromeryx sp. Frick 1937 ruminant said to be new
Artiodactyla - Protoceratidae	Syndyoceras cooki Syndyoceras cooki Barbour 1905 protoceratid
Perissodactyla - Tapiridae	Miotapirus harrisonensis Miotapirus harrisonensis Schlaikjer 1937 tapir
Theriamorpha - Erinaceidae	Parvericius sp. Parvericius sp. Koerner 1940 hedgehog
Theriamorpha - Soricidae	Limnoecus sp. Limnoecus sp. Stirton 1930 shrew
Theriamorpha - Talpidae	Mystipterus sp. Mystipterus sp. Hall 1930 mole
Theriamorpha - Proscalopidae	Proscalops secundus Proscalops secundus Matthew 1909 placental
Lagomorpha - Leporidae	Archaeolagus sp. Archaeolagus sp. Dice 1917 rabbit
Lagomorpha - Ochotonidae	Gripholagomys lavocati Gripholagomys lavocati Green 1972 pika
Rodentia - Heteromyidae	Harrymys sp.¹, Dikkomys matthewi, Cupidinimus sp. Harrymys sp.¹ Munthe 1988 rodent said to be new by Bailey 2004 Dikkomys matthewi Wood 1936 rodent Cupidinimus sp. Wood 1935 rodent
Rodentia - Castoridae	Palaeocastor sp. Palaeocastor sp. Leidy 1869 beaver
Rodentia - Sciuridae	Miospermophilus sp., Protospermophilus sp. Miospermophilus sp. Black 1963 squirrel Protospermophilus sp. Gazin 1930 squirrel
Rodentia - Zapodidae	Schaubeumys sp. Schaubeumys sp. Wood 1935 jumping mouse
Rodentia - Cricetidae	Leidymys sp., Paciculus sp. Leidymys sp. Wood 1936 mouse Paciculus sp. Cope 1879 mouse
Rodentia - Allomyidae	Alwoodia sp. Alwoodia sp. Rensberger 1983 rodent
Rodentia - Entoptychidae	Gregorymys formosus, Entoptychus grandiplanus Gregorymys formosus Matthew 1907 rodent Entoptychus grandiplanus Korth 1992 rodent
Rodentia - Mylagaulidae	Promylagaulus riggsi Promylagaulus riggsi McGrew 1941 rodent
Rodentia - Florentiamyidae	cf. Florentiamys sp. cf. Florentiamys sp. Wood 1936 rodent

¹Bailey 1999; ²Prothero 2008