PBDB Collection

John Day Units B, C, and D (Oligocene of the United States)

Also known as Upper Blue Basin Section; Lower Foree Section

Where: Wheeler County, Oregon (44.7° N, 119.6° W: paleocoordinates 44.3° N, 109.5° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Turtle Cove Member (John Day Formation), Geringian (30.8 - 26.3 Ma)

• SCLF AA date of 28.9 Ma on Blue Basin Tuff between units E and F

• member-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: L. B. Albright, M. O. Woodburne, T. J. Fremd, C. C. Swisher, B. J. MacFadden and G. R. Scott. 2008. Revised chronostratigraphy and biostratigraphy of the John Day Formation (Turtle Cove and Kimberly Members), Oregon, with implications for updated calibration of the Arikareean North American land mammal age. 116(3):211-237 [J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 17508: authorized by John Alroy, entered by John Alroy on 26.03.1995

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Mammalia
Perissodactyla - Rhinocerotidae	Diceratherium sp. Diceratherium sp. Marsh 1875 rhinoceros may include "D. armatum" and/or "D. annectens" of Fremd et al. 1994
Perissodactyla - Equidae	Miohippus sp. Miohippus sp. Marsh 1874 anchitheriine horse may include "M. anceps," "M. equiceps," "M. condoni," and/or "M. sp." of Fremd et al. 194
Artiodactyla - Entelodontidae	Archaeotherium sp. Archaeotherium sp. Leidy 1850 even-toed ungulate
Artiodactyla - Agriochoeridae	Agriochoerus guyotianus² Agriochoerus guyotianus² Cope 1878 agriochoerid omitted by Albright et al. 2008, who do list "Agriochoerus"
Artiodactyla - Hypertragulidae	Hypertragulus hesperius Hypertragulus hesperius Hay 1902 ruminant
Artiodactyla - Tayassuidae	Thinohyus sp. Thinohyus sp. Marsh 1875 peccary
Artiodactyla - Merycoidodontidae	Eporeodon occidentalis Eporeodon occidentalis Marsh 1873 oreodont
Carnivora - Nimravidae	Nimravus brachyops, ? Hoplophoneus sp., "Eusmilus cerebralis" = Hoplophoneus cerebralis Nimravus brachyops Cope 1878 false sabre-tooth includes "N. gomphodus" and possibly "N. sp." of Fremd et al. 1994 ? Hoplophoneus sp. Cope 1874 false sabre-tooth "Eusmilus cerebralis" = Hoplophoneus cerebralis Cope 1880 false sabre-tooth
Carnivora - Canidae	Cynarctoides lemur, Phlaocyon latidens, Rhizocyon oregonensis⁴, Paraenhydrocyon josephi, Enhydrocyon stenocephalus¹ Cynarctoides lemur Cope 1879 bone-crushing dog present in unit C: Wang et al. 1999 Phlaocyon latidens Cope 1881 bone-crushing dog Rhizocyon oregonensis⁴ Merriam 1906 bone-crushing dog bed C: Fremd et al. 1994 Paraenhydrocyon josephi Cope 1881 canid unit C Enhydrocyon stenocephalus¹ Cope 1879 canid may be the type, see Thorpe 1922 and Wang 1994; omitted by Albright et al. 2008, who do list "Enhydrocyon"
Carnivora - Amphicyonidae	Daphoenus sp.³, Temnocyon altigenis Daphoenus sp.³ Leidy 1853 bear-dog unit C, Blue Basin: Fremd et al. 1994 Temnocyon altigenis Cope 1878 bear-dog
Carnivora -	Allocyon loganensis Allocyon loganensis Merriam 1930 carnivoran
Rodentia - Allomyidae	Allomys sp. Allomys sp. Marsh 1877 rodent

¹Alroy 2002; ²Fremd 1994; ³Hunt 1998; ⁴Wang et al. 1999