Topham: Hemingfordian, Canada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Allomys sp. Marsh 1877
3 specimens
    = Allomyinae indet.
Alroy 2002
Mammalia - Rodentia - Cricetidae
Yatkolamys edwardsi Martin and Corner 1980
15 specimens
Leidymys cf. blacki (Macdonald 1963)
7 specimens
Mammalia - Rodentia - Sciuridae
Tamiini indet.
7 specimens
synonym of Marmotini
"Tamias" sp., can't determine from figures and descriptions what this is, although it seems definitely not to be Nototamias hulberti or Tamias ateles: JA 1.7.96
Protospermophilus sp. Gazin 1930
5 specimens
small
Protospermophilus kelloggi Black 1963
5 specimens
Miospermophilus wyomingensis Black 1963
17 specimens
(4 measurements)
Sciurion campestre n. gen., n. sp. Skwara 1986
5 specimens
(6 measurements)
Mammalia - Rodentia
Proheteromys informal small
88 specimens
    = Geomyoidea indet. Bonaparte 1845
Alroy 2002
Proheteromys informal large
13 specimens
    = Geomyoidea indet. Bonaparte 1845
Alroy 2002
Mammalia - Rodentia - Eomyidae
Pseudotheridomys sp. Schlosser 1926
19 specimens
Leptodontomys sp. Shotwell 1956
2 specimens
Mammalia - Rodentia - Geomyidae
Geomyidae indet. Bonaparte 1845
1 specimen
Mammalia - Rodentia - Heliscomyidae
Heliscomys vetus Cope 1873
11 specimens
    = Heliscomys sp. Cope 1873
Korth et al. 1991
Mammalia - Rodentia - Heteromyidae
Stratimus strobeli Korth et al. 1990
Korth et al. 1990 70 specimens
"Proheteromys sp., intermediate" (5 measurements)
Mammalia - Rodentia - Castoridae
Monosaulax sp. Stirton 1935
1 specimen
    = Euroxenomys sp. Samson and Radulesco 1973
Alroy 2002
said to be new and the same as the Martin Canyon species; this conforms to the four-flexus/fossette "Castor" pattern of Xu 1994 instead of the two-flexus pattern typical of Eucastor; it is certainly not the much larger "Amblycastor" or Castor - JA pers. obs. 15.11.94; Sutton and Korth 1995 refer the Martin Canyon form to Euroxenomys
Mammalia - Rodentia - Mylagaulidae
Mylagaulodon cf. angulatus Sinclair 1903
1 specimen
    = Mesogaulus paniensis Matthew 1902
Korth 1992
Mammalia - Rodentia - Zapodidae
Schaubeumys sp. Wood 1935
6 specimens
    = Zapodidae indet. Coues 1875
Alroy 2002
(large)
Schaubeumys clivosus (Galbreath 1953)
28 specimens
    = Plesiosminthus clivosus Galbreath 1953
Alroy 2002
recombined as Schaubeumys clivosus
Mammalia - Lagomorpha - Leporidae
? Desmatolagus schizopetrus Dawson 1965
6 specimens
Megalagus cf. dawsoni Black 1961
1 specimen
Mammalia - Lagomorpha - Ochotonidae
Oreolagus cf. nebrascensis McGrew 1941
42 specimens
(4 measurements)
Mammalia - Lipotyphla - Erinaceidae
Hibbarderix sp. Martin and Green 1984
7 specimens
Mammalia - Lipotyphla - Talpidae
? Mystipterus sp. Hall 1930
5 specimens
? Scalopoides sp. Wilson 1960
1 specimen
Mammalia - Perissodactyla - Equidae
Parahippus sp. (Leidy 1858)
6 specimens
    = Equidae indet. Gray 1821
Alroy 2002
Hypohippus cf. equinus (Scott 1893)
7 specimens
Mammalia - Proscalopidae
Mesoscalops sp. Reed 1960
3 specimens
Mammalia - Carnivora - Mustelidae
Mustelidae indet. Fischer 1817
2 specimens
Mammalia - Carnivora - Canidae
Canidae indet. Fischer 1817
6 specimens
Mammalia - Ungulata - Merycoidodontidae
Merycoidodontidae indet. Cook 1912
1 specimen
small
? Merychyus sp. Leidy 1858
2 specimens
Mammalia - Ungulata - Entelodontidae
Entelodontidae indet. Lydekker 1883
1 specimen
Mammalia - Ungulata - Camelidae
Michenia sp. Frick and Taylor 1971
2 specimens
? Miolabis sp. Hay 1899
1 specimen
Mammalia - Ungulata - Protoceratidae
Protoceratidae indet. Marsh 1891
1 specimen
Mammalia - Ungulata - Palaeomerycidae
? Sinclairomeryx sp. Frick 1937
5 specimens
? Bouromeryx sp. Skinner et al. 1977
4 specimens
Bouromeryx americanus (Douglass 1899)
Prothero and Liter 2008
Mammalia - Ungulata - Moschidae
Parablastomeryx sp. Frick 1937
11 specimens
Blastomeryx sp. Cope 1877
29 specimens
compared to B. elegans and B. gemmifer
see common names

Geography
Country:Canada State/province:Saskatchewan
Coordinates: 49.6° North, 109.0° West (view map)
Paleocoordinates:50.4° North, 105.0° West
Basis of coordinate:based on nearby landmark
Time
Period:Neogene Epoch:Miocene
Stage:Burdigalian 10 m.y. bin:Cenozoic 5
*Period:Tertiary
Key time interval:Hemingfordian
Age range of interval:20.43000 - 15.97000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Cypress Hills
Lithology and environment
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection size:307 specimens
Taxonomic list comments:NISP 307 (valid genus or species level i.d.s only)
"? Paradjidaumo sp.", NISP 4, is possibly reworked from underlying Chadronian deposits that yield P. hansonorum

"Heliscomys cf. tenuiceps" (NISP 5): compared to the florentiamyids Ecclesimus tenuiceps and Kirkomys schlaikjeri, but Korth et al. 1990 specifically state that no florentiamyids are present
Metadata
Database number:18003
Authorizer:J. Alroy, J. Marcot Enterer:J. Alroy, J. Marcot
Modifier:J. Alroy Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2009-07-15 19:38:05
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

3180. T. Skwara. 1988. Mammals of the Topham Local Fauna: Early Miocene (Hemingfordian), Cypress Hills Formation, Saskatechewan. Natural History Contributions 9:1-169 [J. Alroy/J. Alroy/J. Marcot]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Uhen]
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]
21525% 20540W. W. Korth, B. E. Bailey, and R. M. Hunt, Jr. 1990. Geomyoid rodents from the early Hemingfordian (Miocene) of Nebraska. Annals of Carnegie Museum 59(1):25-47 [J. Alroy/J. Alroy/M. Carrano]
2153 W. W. Korth, J. H. Wahlert, and R. J. Emry. 1991. A New Species of Heliscomys and Recognition of the Family Heliscomyidae (Geomyoidea: Rodentia). Journal of Vertebrate Paleontology 11(2):247-256 [J. Alroy/J. Alroy/J. Marcot]
51379 D. R. Prothero and M. R. Liter. 2008. Systematics of the dromomerycines and aletomerycines (Artiodactyla: Palaeomerycidae) from the Miocene and Pliocene of North America. In S. G. Lucas, G. S. Morgan, J. A. Spielmann, D. R. Prothero (eds.), Neogene Mammals 44:273-298 [J. Marcot/J. Marcot]
3503 M. R. Voorhies. 1990. Vertebrate paleontology of the proposed Norden Reservoir Area, Brown, Cherry and Keya Paha counties, Nebraska. Technical Report, Division of Archeological Research, Department of Anthropology, University of Nebraska 82-09 [J. Alroy/J. Alroy/J. Alroy]