Douglas Area Brule (6a-6d) (Oligocene of the United States)

Where: Converse County, Wyoming (42.9° N, 105.2° W: paleocoordinates 44.2° N, 97.1° W)

• coordinate based on political unit

When: Brule Formation, Orellan (33.9 - 33.3 Ma)

Environment/lithology: terrestrial

Primary reference: E. Evanoff et al. 1992. [J. Alroy/J. Alroy]more details

PaleoDB collection 17105: authorized by John Alroy, entered by John Alroy on 30.04.1994

Creative Commons license: CC BY (attribution)

Taxonomic list

• between tuffs 6a and 6d
Mammalia
 Leptictida - Leptictidae
Leptictis dakotensis Leidy 1868 eutherian
 Rodentia - Cricetidae
"Scottimus viduus" = Willeumys viduus
"Scottimus viduus" = Willeumys viduus Korth 1981 mouse
 Rodentia - Ischyromyidae
Ischyromys sp. Leidy 1856 rodent
 Lagomorpha - Leporidae
Palaeolagus haydeni Leidy 1856 rabbit
Megalagus turgidus Cope 1873 rabbit
Litolagus molidens Dawson 1958 rabbit
may include type of Dawson 1958 from LNZ 6.5 mi SE of Douglas
 Carnivora -
Palaeogale sectoria Gervais 1848 carnivoran
 Ungulata - Merycoidodontidae
Miniochoerus chadronensis Schultz and Falkenbach 1956 oreodont
boundary between M. chadronensis and M. gracilis is drawn within this zone
"Merycoidodon culbertsoni" = Merycoidodon (Merycoidodon) culbertsoni Leidy 1848 oreodont
 Ungulata - Camelidae
Paratylopus labiatus Cope 1881 camel
Poebrotherium wilsoni Leidy 1847 camel
Poebrotherium eximium Hay 1902 camel
see also Prothero 1996d
 Ungulata - Hypertragulidae
Hypertragulus calcaratus Cope 1873 ruminant
 Ungulata - Leptomerycidae
Leptomeryx evansi Leidy 1853 ruminant
 Hyaenodonta - Hyaenodontidae
Hyaenodon horridus Leidy 1853 eutherian
Hyaenodon crucians Leidy 1853 eutherian