Antelope Creek (SDSM V-582): Duchesnean, South Dakota
collected by B. White, J. Clark 1958

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
Allognathosuchus cf. riggsi Patterson 1931
synonym of Alligator prenasalis
jaw fragment
Reptilia - Testudines - Emydidae
? Graptemys sp. Agassiz 1857
compared to G. inornata and G. cordifera
    = Pseudograptemys sp. Hutchison 1996
Alroy 2008
see Hutchison 1996
Reptilia - Testudines - Trionychidae
Trionychidae indet. Gray 1825
Mammalia - Perissodactyla - Equidae
Epihippus intermedius (Peterson 1932)
(5 measurements)
    = Duchesnehippus intermedius Peterson 1932
Alroy 2002
Mammalia - Perissodactyla - Amynodontidae
Amynodontopsis bodei Stock 1933
(5 measurements)
Mammalia - Perissodactyla - Tapiridae
? Colodon cingulatus Douglass 1902
(6 measurements)
Mammalia - Perissodactyla - Brontotheriidae
Teleodus thyboi n. sp. Bjork 1967
(5 measurements)
    = Duchesneodus uintensis Peterson 1931
Alroy 2002
see also Lucas and Schoch 1989b
Mammalia - Protoceratidae
Leptotragulinae indet.
invalid subgroup of Protoceratidae
Mammalia - Agriochoeridae
Agriochoeridae indet. Leidy 1869
Actinopteri - Lepisosteiformes - Lepisosteidae
Lepisosteus sp. Agassiz 1843
see common names

Geography
Country:United States State/province:South Dakota County:Harding
Coordinates: 45.6° North, 103.9° West (view map)
Paleocoordinates:47.3° North, 93.9° West
Basis of coordinate:based on political unit
Geographic resolution:small collection
Time
Period:Paleogene Epoch:Eocene
Stage:Bartonian 10 m.y. bin:Cenozoic 3
*Period:Tertiary
Key time interval:Duchesnean
Age range of interval:40.40000 - 37.20000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Slim Buttes
Lithology and environment
Primary lithology: "siliciclastic"
Lithology description: the formation "is a thin sequence of variegated sands, silts, and clays"
Environment:fluvial indet.
Geology comments: fauna "suggests that a permanently flowing river was present"
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:survey of museum collection
Reason for describing collection:general faunal/floral analysis
Museum repositories:SDSM
Collectors:B. White, J. Clark Collection dates:1958
Metadata
Database number:16823
Authorizer:J. Alroy Enterer:J. Alroy
Modifier:J. Alroy Research group:vertebrate
Created:1997-04-12 00:00:00 Last modified:2008-09-10 12:41:32
Access level:the public Released:1997-04-12 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

1067. P. R. Bjork. 1967. Latest Eocene vertebrates from northwestern South Dakota. Journal of Paleontology 41(1):227-236 [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]
26812 J. Alroy. 2008. Synonymies, reidentifications, and other arbitrary pronouncements mostly concerning fossil vertebrates. [J. Alroy/J. Alroy]