Monroe Creek (SDSM V-6215): Monroecreekian, South Dakota

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Proscalopidae
Proscalops secundus Matthew 1909
7 specimens
Mammalia - Erinaceidae
Parvericius cf. montanus Koerner 1940
5 specimens
    = Parvericius sp. Koerner 1940
Korth 1992
Brachyerix macrotis Matthew 1933
1 specimen
    = Amphechinus horncloudi Macdonald 1970
Rich 1981
Mammalia - Carnivora - Mustelidae
Plesictis sp. Pomel 1846
20 specimens
    = Mustelavus sp. Clark 1936
Macdonald 1970
"smaller than" but "conforms in every way to" Mustelavus priscus; also suggested to be Acheronictis by Hayes 2000, but no formal action is taken; Macdonald 1972 reports "Carnivora,"
Mammalia - Lagomorpha - Ochotonidae
? Ochotonidae indet. Thomas 1897
Desmatolagus sp. Matthew and Granger 1923
3 specimens
    = Gripholagomys sp. Green 1972
Green 1972
Mammalia - Rodentia - Zapodidae
Plesiosminthus grangeri (Wood 1935)
3 specimens
    = Schaubeumys grangeri Wood 1935
Green 1977
"Plesiosminthus sp."; DUPLICATE REF 1712 or 1713 or 1714
Mammalia - Rodentia - Cricetidae
Paciculus cf. montanus Black 1961
10 specimens
informal Cricetid indet.
1 specimen
    = Leidymys sp. Wood 1936
Martin and Green 1984
Mammalia - Rodentia - Entoptychidae
Gregorymys formosus (Matthew 1907)
listed also by Wahlert and Souza 1988; NISP "approximately 75"
Mammalia - Rodentia - Florentiamyidae
Sanctimus tiptoni Macdonald 1970
7 specimens
(3 measurements)
    = Florentiamys tiptoni Macdonald 1970
Alroy 2002
Mammalia - Rodentia - Castoridae
Capatanka sp. Macdonald 1963
    = Castoridae indet. Gray 1821
Alroy 2002
Palaeocastor cf. simplicidens (Matthew 1907)
16 specimens
    = Fossorcastor cf. fossor Peterson 1905
Alroy 2002
Mammalia - Rodentia - Heteromyidae
Proheteromys ironcloudi n. sp. Macdonald 1963
Macdonald 1970 14 specimens
Macdonald 1972 reports "Proheteromys sp."
Mammalia - Rodentia - Sciuridae
Sciuridae indet. Gray 1821
large form only; "Protosciurus" of Macdonald 1970
    = Protospermophilus sp. Gazin 1930
Storer 2002
Mammalia - Rodentia - Allomyidae
Allomys harkseni Macdonald 1963
    = Alwoodia harkseni Macdonald 1963
Alroy 2002
NISP about 9, perhaps more
Mammalia
Peratherium youngi McGrew 1937
4 specimens
    = Herpetotherium youngi McGrew 1937
Alroy 2002
Reptilia
Peltosaurus granulosus Cope 1873
ElShafie 2024
see common names

Geography
Country:United States State/province:South Dakota County:Shannon
Coordinates: 43.3° North, 102.5° West (view map)
Paleocoordinates:44.1° North, 96.6° West
Basis of coordinate:based on political unit
Geographic resolution:small collection
Time
Period:Paleogene Epoch:Oligocene
Stage:Chattian 10 m.y. bin:Cenozoic 4
*Period:Tertiary
Key time interval:Monroecreekian
Age range of interval:24.70000 - 23.10000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Monroe Creek
Local section:BgBad Local bed:14
Local order:bottom to top
Lithology and environment
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Collection methods and comments
Collection size:175 specimens
Museum repositories:SDSM
Taxonomic list comments:NISP about 175
not clear what "Promylagaulus riggsi" is in light of Rensberger 1979, who does not mention this locality
Metadata
Also known as:LACM 2008; Ironcloud Ranch
Database number:17561
Authorizer:J. Alroy, P. Holroyd Enterer:J. Alroy, P. Holroyd
Modifier:J. Alroy Research group:vertebrate
Created:1995-03-26 00:00:00 Last modified:2011-04-21 20:03:51
Access level:the public Released:1995-03-26 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
2362. L. J. Macdonald. 1972. Monroe Creek (early Miocene) microfossils from the Wounded Knee area, South Dakota. South Dakota Geological Survey Report of Investigations 105:1-43 [J. Alroy/J. Alroy/M. Uhen]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
87093 S. J. ElShafie. 2024. Body size estimation from isolated fossil bones reveals deep time evolutionary trends in North American lizards. PLoS ONE 19(1:e0296318):1-25 [P. Holroyd/P. Holroyd/P. Holroyd]
1711 M. Green. 1972. Lagomorpha from the Rosebud Formation, South Dakota. Journal of Paleontology 46(3):377-385 [J. Alroy/J. Alroy/M. Uhen]
1712 M. Green. 1977. Dipoides (Rodentia: Castoridae) from Yankton County, South Dakota. Journal of Paleontology 51(1) [J. Alroy/J. Alroy/J. Ju]
2115 W. W. Korth. 1992. Fossil small mammals from the Harrison Formation (late Arikareean: earliest Miocene), Cherry County, Nebraska. Annals of Carnegie Museum 61(2):69-132 [J. Alroy/J. Alroy/M. Uhen]
2356 J. R. Macdonald. 1970. Review of the Miocene Wounded Knee faunas of southwestern South Dakota. Bulletin of the Los Angeles County Museum of Natural History, Science 8:165-82 [J. Alroy/J. Alroy/C. Bell]
2416 J. E. Martin and M. Green. 1984. Insectivora, Sciuridae, and Cricetidae from the Early Miocene Rosebud Formation in South Dakota. In R. M. Mengle (ed.), Carnegie Museum of Natural History Special Publication 9:28-40 [J. Alroy/J. Alroy/M. Uhen]
2897 T. H. V. Rich. 1981. Origin and History of the Erinaceinae and Brachyericinae (Mammalia, Insectivora) in North America. Bulletin of the American Museum of Natural History 171(1):1-116 [J. Alroy/J. Alroy/P. Mannion]
7360 J. E. Storer. 2002. Small mammals of the Kealey Springs local fauna (early Arikareean; late Oligocene) of Saskatchewan. Paludicola 3(4):105-133 [J. Alroy/J. Alroy/J. Alroy]