Warm Springs (RV-7608): late Late Arikareean, Oregon

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Lagomorpha - Leporidae
Archaeolagus cf. macrocephalus (Matthew 1907)
1 specimen
Mammalia - Rodentia - Cricetidae
Deperetomys dingusi Martin et al. 2023
Martin et al. 2023 1 specimen
Mammalia - Rodentia - Entoptychidae
Entoptychus individens Rensberger 1971
12 specimens
Mammalia - Rodentia - Castoridae
? Palaeocastor sp. Leidy 1869
2 specimens
Mammalia - Perissodactyla - Equidae
Parahippus aff. leonensis Sellards 1916
2 specimens
Archaeohippus sp. Gidley 1906
5 specimens
Mammalia - Merycoidodontidae
Merychyus calaminthus Jahns 1940
2 specimens
Merychyus cf. arenarum Cope 1884
1 specimen
    = Merychyus minimus Peterson 1907
Stevens et al. 2023
Mammalia - Leptomerycidae
Leptomerycinae indet. (Zittel 1893)
original and current combination Leptomerycidae
Mammalia - Hypertragulidae
cf. Hypertragulus sp. Cope 1874
10 specimens
Mammalia - Tayassuidae
Cynorca sociale (Marsh 1875)
3 specimens
recombined as Marshochoerus socialis
see common names

Geography
Country:United States State/province:Oregon County:Wasco
Coordinates: 44.9° North, 121.3° West (view map)
Paleocoordinates:44.6° North, 112.3° West
Basis of coordinate:based on political unit
Geographic resolution:small collection
Time
10 m.y. bin:Cenozoic 4-5
*Period:Tertiary *Epoch:Miocene
Key time interval:late Late Arikareean
Age range of interval:29.50000 - 18.50000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:John Day
Local section:WarmS Local bed:1
Local order:bottom to top
Stratigraphic resolution:group of beds
Stratigraphy comments: "in the basal few meters of the exposed section" (Woodburne and Robinson 1977)
said to be "latest Arikareean"
Lithology and environment
Primary lithology:tuffaceous,brown sandstone
Secondary lithology: siltstone
Lithology description: "tuffaceous sandstone and siltstone, generally light to dark tan" (Woodburne and Robinson 1977)
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:surface (float),field collection
Collection size:38 specimens
Reason for describing collection:taxonomic analysis
Collection method comments: "Most of the fossils were discovered as float" (Woodburne and Robinson 1977)
Taxonomic list comments:below the "lapilli-tuff"
stratigraphically mixed lists from RV-7314 and 7711 are omitted; original list of Woodburne and Robinson 1977 lumped RV-7608 and RV-7609
NISP 38
Metadata
Database number:18013
Authorizer:J. Alroy, J. Marcot, P. Holroyd Enterer:J. Alroy, J. Marcot, P. Holroyd
Modifier:J. Alroy Research group:vertebrate
Created:1993-09-27 00:00:00 Last modified:2004-03-17 13:19:15
Access level:the public Released:1993-09-27 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
1367. L. Dingus. 1990. Systematics, stratigraphy, and chronology for mammalian fossils (Late Arikareean to Hemingfordian) from the uppermost John Day Formation, Warm Springs, Oregon. PaleoBios 12(47/48):1-24 [J. Alroy/J. Alroy/J. Alroy]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
84451 R. A. Martin, T. S. Kelly, and P. Holroyd. 2023. Two Asian cricetodontine-like muroid rodents from the Neogene of western North America. Journal of Paleontology 1-19 [P. Holroyd/P. Holroyd]
86699 M. S. Stevens, D. R. Prothero, C. Cleaveland, E. Welsh, K. Marriott, T. Htun, D. Balassa, S. M. Olson, K. I. Watmore and D. Wheeler. 2023. Systematics of the Late Oligocene and Miocene Oreodonts (Merycoidodontidae: Artiodactyla). New Mexico Museum of Natural History and Science Bulletin 93:1-226 [J. Marcot/J. Marcot]
37605% 35540M. O. Woodburne and P. T. Robinson. 1977. A new late Hemingfordian mammal fauna from the John Day Formation, Oregon, and its stratigraphic implications. Journal of Paleontology 51(4):750-757 [J. Alroy/J. Alroy/J. Head]