Dickinson Member (Savanna) (Oligocene of the United States)

Also known as Obritsch Ranch; Fitterer Ranch

Where: Stark County, North Dakota (46.9° N, 102.8° W: paleocoordinates 48.0° N, 94.2° W)

• coordinate based on political unit

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

• member-level stratigraphic resolution

Environment/lithology: terrestrial

Primary reference: J. W. Hoganson and G. E. Lammers. 1992. Vertebrate fossil record, age, and paleoenvironmental setting of the Brule Formation (Oligocene) in North Dakota. Proceedings of the F. D. Holland, Jr., Geological Symposium 243-255 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 17100: authorized by John Alroy, entered by John Alroy on 27.09.1993, edited by Philip Mannion and Jeff Person

Creative Commons license: CC BY (attribution)

Taxonomic list

• does not include Fitterer Bed Quarry (see)
probably includes most or all of Little Bad Lands list of Douglass 1909b and other Little Badlands records
H & L list several new records of unclear provenance
the following Orellan records from Hoganson and Lammers 1985 are of unclear status: cf. "Protosciurus" sp. cf. Paradjidaumo sp. cf. Heliscomys sp. Caenopus sp. cf. Hyracodon sp.
Orellan taxa listed by Kihm and Lammers 1986: ? Cedromus sp. ? Hoplophoneus sp. ? Eusmilus sp. ? Amphicyonidae indet. "Diceratherium" tridactylum Entelodontidae indet. ("Entelodon sp.") ? Hypertragulus sp. multiple oreodonts of Schultz and Falkenbach, e.g.
Orellan taxa listed by Lammers and Hoganson 1988: Hyaenodon crucians Hyaenodon horridus
supposed Whitneyan fauna of Kihm and Lammers 1986 is of unstated provenance and may correspond to "Upper White River" fauna of Douglass 1909b including rhinos, oreodonts, and "Mesohippus" Eumys brachyodus Kihm 1990 is from Schmidt Ranch, of uncertain stratigraphic relation to the other Stark Co. localities Palaeocastor nebrascensis Xu 1996: "AMNH Loc. 5 of Hough, Stark Co." "Brontotheriid" of Lammers and Hoganson from "Little Bad Lands" is of uncertain stratigraphic provenance
"Fitterer Ranch" no further data: Parictis sp. Hunt 1998a: "Fitterer Ranch, SW of Dickinson"
"Adjidaumo douglassi" - see Korth and Bailey 1992
 Testudines - Trionychidae
"Apalone leucopotamica" = Trionyx leucopotamicus2
"Apalone leucopotamica" = Trionyx leucopotamicus2 Cope 1891 softshell turtle
 Leptictida - Leptictidae
Leptictis dakotensis Leidy 1868 eutherian
 Rodentia - Cricetidae
Eumys elegans Leidy 1856 mouse
 Rodentia - Ischyromyidae
Ischyromys typus Leidy 1856 rodent
 Lagomorpha - Leporidae
Palaeolagus haydeni Leidy 1856 rabbit
Megalagus sp. Walker 1931 rabbit
 Carnivora - Amphicyonidae
Daphoenus sp. Leidy 1853 bear-dog
 Carnivora - Canidae
Hesperocyon sp. Scott 1890 canid
 Carnivora - Nimravidae
Dinictis sp. Leidy 1854 false sabre-tooth
 Ungulata - Camelidae
Poebrotherium sp. Leidy 1847 camel
probably P. wilsoni of Honey et al. 1998 from Stark Co.
 Ungulata - Leptomerycidae
Leptomeryx evansi Leidy 1853 ruminant
may include Fitterer Ranch material of Heaton and Emry 1996
Quinetia frigidaria n. sp.1 Czaplewski et al. 2019