Where: Jackson County, South Dakota (43.8° N, 101.9° W: paleocoordinates 44.7° N, 94.3° W)
• coordinate stated in text
When: lower Poleslide Member (Brule Formation), Whitneyan (33.3 - 30.8 Ma)
• In this section, the fossils are derived from the Bjork siltstone beds (unit 8 of Evanoff et al. 2010:fig. 3; also see Evanoff et al. 2010 suppl.:fig 11b; Fig. 1). The age of the rocks and fauna are interpreted as early Whitneyan (middle Oligocene). The specimens were recovered from the lower part of the Poleslide Member, which contains a typical Whitneyan Fauna (as defined by Prothero and Emry 2004), and conformably overlies the Orellan Scenic Member of the Brule Formation (Evanoff et al. 2010).
Environment/lithology: terrestrial; lithology not reported
Size classes: macrofossils, mesofossils
Primary reference: W. W. Korth. 2014. Rodents (Mammalia) from the Whitneyan (Middle Oligocene) Cedar Pass Fauna of South Dakota. Annals of Carnegie Museum 82(4):373-398 [J. Marcot/J. Marcot]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 170168: authorized by Jonathan Marcot, entered by Jonathan Marcot on 15.06.2015, edited by Mark Uhen
Creative Commons license: CC BY (attribution)
Taxonomic list
Mammalia | |
Ischyromys typus Leidy 1856 rodent | |
Kirkomys martintau Korth 2008 rodent | |
Epeiromys sp. Korth 1989 rodent | |
Disallomys robustus Korth 2009 mountain beaver
Campestrallomys dawsonae Macdonald 1963 mountain beaver | |
Douglassciurus bjorki n. sp. Korth 2014 squirrel
Oligospermophilus sp. Korth 1987 squirrel
Hesperopetes jamesi Emry and Korth 2007 squirrel | |
Proharrymys wahlerti Korth and Branciforte 2007 rodent | |
Eomyidae indet., "Paradjidaumo trilophus" = Adjidaumo trilophus
Eomyidae indet. Winge 1887 rodent
"Paradjidaumo trilophus" = Adjidaumo trilophus Cope 1873 rodent | |
Eutypomys cf. wilsoni rodent | |
Palaeocastor wahlerti Korth 2001 beaver
Agnotocastor praetereadens Stirton 1935 beaver | |
Eumys brachyodus, Scottimus lophatus, Paciculus cf. nebraskensis, Paciculus cedrus n. sp., Leidymys cf. blacki, Leidymys juxtaparvulus
Eumys brachyodus Wood 1937 mouse
Scottimus lophatus Wood 1937 mouse
Paciculus cf. nebraskensis Alker 1969 mouse
Paciculus cedrus n. sp. Korth 2014 mouse
Leidymys cf. blacki Macdonald 1963 mouse
Leidymys juxtaparvulus Korth 2010 mouse | |
Proscalops tertius Reed 1961 placental |