Also known as UNSM Sh-114
Where: Sheridan County, Nebraska (42.8° N, 102.2° W: paleocoordinates 43.6° N, 97.1° W)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Lions Bridge Beds Member (Lavaca Flats Beds Formation), Harrisonian (24.8 - 18.5 Ma)
• "late late Arikareean" (= Harrisonian)
• bed-level stratigraphic resolution
Environment/lithology: fluvial; fine-grained conglomerate
Size class: mesofossils
Reposited in the UNSM
Collection methods: quarrying,
• "less than about 45 kg of gravel concentrate produced a small, fairly diverse microfauna. Reptile remains were abundant, especially jaws with teeth, while no fish, amphibian, or bird elements were recovered. Small mammal taxa are represented by one jaw fragment with one tooth and 38 isolated cheek teeth."
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 69807: authorized by John Alroy, entered by John Alroy on 07.03.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Mammalia | |
Miospermophilus sp. Black 1963 squirrel
Protospermophilus sp. Gazin 1930 squirrel | |
Alwoodia sp. Rensberger 1983 rodent | |
Paciculus nebraskensis Alker 1969 mouse | |
? Palaeocastor sp. Leidy 1869 beaver | |
"Heliscomys woodi" = Tylionomys woodi
"Heliscomys woodi" = Tylionomys woodi McGrew 1941 rodent | |
Schizodontomys cf. harkseni Macdonald 1970 rodent
Harrymys sp. Munthe 1988 rodent
Proheteromys sp. Wood 1932 rodent | |
Promylagaulus riggsi McGrew 1941 rodent | |
Gripholagomys lavocati Green 1972 pika | |
Parvericius sp. Koerner 1940 hedgehog | |
Proscalops secundus Matthew 1909 placental | |
Herpetotherium youngi McGrew 1937 marsupial |