Davis Ranch: Bridgerian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Dinocerata - Uintatheriidae
Bathyopsis fissidens Cope 1881
Mammalia - Esthonychidae
Trogosus sp. Leidy 1871
Esthonyx acutidens Cope 1881
(4 measurements)
Mammalia - Apatemyidae
Apatemys cf. bellulus Marsh 1872
Mammalia - Leptictidae
Palaeictops sp. Matthew 1899
Palaeictops multicuspis (Granger 1910)
Mammalia - Epoicotheriidae
Pentapassalus woodi (Guthrie 1967)
Tubulodon taylori Jepsen 1932
described by Rose et al. 1991: type
Dipassalus oryctes Rose et al. 1991
Rose et al. 1991
Mammalia - Creodonta
Creodonta indet. (Cope 1875)
Mammalia - Creodonta - Hyaenodontidae
Hyaenodontidae indet. Leidy 1869
Tritemnodon strenua
    = Tritemnodon strenuus Cope 1875
Alroy 2002
Protopsalis sp. Cope 1880
Stucky and Hardy 2007
dark red stratum
Mammalia - Creodonta
Prolimnocyon antiquus Matthew and Granger 1915
Limnocyon sp. Marsh 1872
Mammalia - Creodonta - Oxyaenidae
Patriofelis sp. Leidy 1870
Stucky and Hardy 2007
dark red stratum
Malfelis badwaterensis n. gen., n. sp. Stucky and Hardy 2007
Stucky and Hardy 2007
UCM locality 81023, below dark red stratum (5 measurements)
Oxyaenidae indet. Cope 1877
    = Machaeroides simpsoni Dawson et al. 1986
Dawson et al. 1986
CM 34 DUPLICATE REF 1349 or 1352
Mammalia - Viverravidae
Didymictis altidens Cope 1880
Viverravus cf. gracilis Marsh 1872
Viverravus lutosus Gazin 1952
Mammalia
cf. Oodectes sp. Wortman 1901
Mammalia - Carnivora - Miacidae
Uintacyon sp. Leidy 1873
    = Miacidae indet. Cope 1880
Alroy 2002
Mammalia
Vulpavus canavus (Cope 1881)
Miacis cf. parvivorus Cope 1872
Miacis cf. latidens Matthew and Granger 1915
Miacis cf. exiguus Matthew and Granger 1915
Mammalia - Acreodi - Mesonychidae
Mesonychidae indet. Cope 1875
Mammalia - Procreodi - Arctocyonidae
Thryptacodon loisi Kelley and Wood 1954
    = Thryptacodon antiquus Matthew and Granger 1915
Alroy 2002
Mammalia - Perissodactyla
Hyracotherium craspedotum Cope 1880
    = Perissodactyla indet. Owen 1848
Alroy 2002
could be Systemodon tapirinus
Mammalia - Perissodactyla - Brontotheriidae
Palaeosyops borealis Cope 1880
    = Eotitanops borealis Cope 1880
Alroy 2002
includes "Helohyus cf. plicodon": Stucky and McKenna 1993
Mammalia - Perissodactyla
Selenaletes scopaeus Radinsky 1966
apparently the type but provenance is uncertain: Radinsky 1966a
Heptodon sp. Cope 1882
H. ventorum, in part
Heptodon ventorum (Cope 1880)
    = Heptodon calciculus Cope 1880
Alroy 2002
Heptodon posticus (Cope 1882)
Mammalia - Perissodactyla - Hyrachyidae
Hyrachyus cf. eximius Leidy 1871
Mammalia - Perissodactyla - Equidae
Orohippus sp. Marsh 1872
Mammalia - Perissodactyla - Palaeotheriidae
Hyracotherium vasacciense (Cope 1872)
Mammalia - Phenacodontidae
Ectocion superstes Granger 1915
Phenacodus primaevus (Cope 1873)
    = Phenacodus sp. Cope 1873
Alroy 2002
Phenacodus vortmani (Cope 1880)
Mammalia - Homacodontidae
Antiacodon vanvaleni n. sp. Guthrie 1971
Mammalia - Diacodexeidae
Bunophorus sp. Sinclair 1914
"A"
Bunophorus sinclairi n. sp. Guthrie 1966
Guthrie 1966
see also Stucky and Krishtalka 1990; includes type of "B. gazini"
Diacodexis olseni Sinclair 1914
(1 measurement)
    = Diacodexis secans Cope 1881
Krishtalka and Stucky 1985
"lineage segment Diacodexis secans-secans"
Diacodexis minutus Krishtalka and Stucky 1985
at CM 34: K & S 1985
Mammalia - Pantolestidae
Palaeosinopa didelphoides (Cope 1881)
Mammalia - Geolabididae
Didelphodus cf. altidens (Marsh 1872)
Mammalia - Primates - Plesiadapidae
Trogolemur amplior n. sp. Beard et al. 1992
Beard et al. 1992
from CM 34 DUPLICATE REF 1045 or 1049
Trogolemur fragilis n. sp. Beard et al. 1992
Beard et al. 1992
from CM 34 DUPLICATE REF 1045 or 1049
Mammalia - Primates - Paromomyidae
Phenacolemur sp. Matthew 1915
    = Phenacolemurinae indet. Simpson 1955
Alroy 2002
Mammalia - Primates - Omomyidae
Shoshonius cooperi Granger 1910
(1 measurement)
Absarokius noctivagus Matthew 1915
    = Absarokius abbotti Loomis 1906
Alroy 2002
Anemorhysis natronensis n. sp. Beard et al. 1992
Beard et al. 1992
from CM 34 DUPLICATE REF 1045 or 1049
Mammalia - Primates - Microsyopidae
Microsyops lundeliusi (White 1952)
    = Megadelphus lundeliusi White 1952
Alroy 2002
Microsyops cf. scottianus Cope 1881
Uintasorex cf. parvulus Matthew 1909
Mammalia - Primates - Notharctidae
Notharctus nunienus (Cope 1881)
    = Cantius nunienus Cope 1881
Maas and O'Leary 1996
presumably replaces "N. cf. robinsoni"; includes "Copelemur consortutus" type of Gingerich and Simons 1977; presumably also includes "Copelemur nr. feretutus" because Godinot 1998 places the latter (a synonym of Cantius frugivorus) within a lineage leading to C. nunienus
Mammalia - Rodentia - Sciuravidae
Knightomys depressus (Loomis 1907)
Knightomys senior (Gazin 1952)
Knightomys huerfanensis (Wood 1962)
Mammalia - Rodentia - Ischyromyidae
Paramys copei Loomis 1907
Paramys excavatus Loomis 1907
Mattimys kalicola (Matthew 1918)
Acritoparamys francesi (Wood 1962)
Mammalia - Condylarthra - Hyopsodontidae
Hyopsodus cf. minusculus Leidy 1873
confirmed by Redline 1997
Hyopsodus walcottianus Matthew 1915
Redline 1997
presumably includes "Hyopsodus sp."
Hyopsodus paulus Leidy 1870
includes "H. wortmani": Redline 1997
Mammalia
Peratherium comstocki Cope 1884
Peratherium marsupium (Troxell 1923)
    = Herpetotherium marsupium Troxell 1923
Alroy 2002
Peratherium innominatum Simpson 1928
    = Copedelphys innominata Simpson 1928
Alroy 2002
Armintodelphys dawsoni Krishtalka and Stucky 1983
Reptilia - Rhineuridae
Ototriton minor n. sp. Gilmore and Jepsen 1945
Gilmore and Jepsen 1945 1 specimen
PU 13460 (holotype), a skull lacking much of its roof and articulated lower jaws
unclassified
Scenopagus sp. McKenna and Simpson 1959
see common names

Geography
Country:United States State/province:Wyoming County:Natrona
Coordinates: 43.2° North, 107.3° West (view map)
Paleocoordinates:46.9° North, 93.1° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period: Paleogene Epoch: Eocene
10 m.y. bin: Cenozoic 2
*Period:Tertiary *Local age/stage:Gardnerbuttean
Key time interval: Bridgerian
Age range of interval: 50.5 - 46.2 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Wind River Member:Lost Cabin
Stratigraphic resolution:group of beds
Stratigraphy comments: said to be Gardnerbuttean
mostly from the "dark red stratum," but apparently at a much higher level than the "dark red stratum" at Buck Spring
UCM 81023/MS9-U3 is from immediately below UCM 79042/MS9-U6, which are in the dark red stratum (Stucky and Hardy 2007)
Lithology and environment
Primary lithology:gray,red mudstone
Lithology description: lower fossil horizon is a "gray mudstone, 2.1 m thick" and is "below the main fossil-bearing red mudstone layer"
Environment:fluvial-lacustrine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Collection size:1490 specimens
Reason for describing collection:biostratigraphic analysis
Museum repositories:CM,UCM
Collection method comments: includes 1931 Princeton University collections from NW of Arminto
Taxonomic list comments:5 mi NW of Arminto," but NOT the same as the Arminto L.F. (see)
"Ectypodus sp." at CM 34 Pilgrim Creek: Krishtalka et al. 1982; according to Stucky (pers. comm.) this is not Davis Ranch
Metadata
Also known as:UCM 79041, 79042, 81023; CM 34; MS9-U3, MS9-U6; Alkali Creek; Sullivan Ranch; Pilgrim Creek; Guthrie Locality 1; 5 mi NW of Arminto
Database number:16207
Authorizer:J. Alroy, M. Carrano Enterer:J. Alroy, M. Carrano
Modifier:J. Alroy Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2008-02-14 16:44:41
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
3329. R. K. Stucky. 1984. Revision of the Wind River faunas, early Eocene of central Wyoming. Part 5. Geology and biostratigraphy of the upper part of the Wind River Formation, northeastern Wind River Basin. Annals of Carnegie Museum 53(9):231-294 [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]
1045 K. C. Beard, B. Sigé, and L. Krishtalka. 1992. A primitive vespertilionoid bat from the early Eocene of central Wyoming. Comptes Rendus de l'Academie des Sciences, Paris, Serie II 314:735-741 [J. Alroy/J. Alroy/P. Mannion]
1349 M. R. Dawson, L. J. Hickey, K. Johnson and C. J. Morrow, Jr. 1986. National Geograpic Research 2(1) [J. Alroy/J. Alroy]
90695% 41660D. A. Guthrie. 1966. A new species of dichobunid artiodactyl from the early Eocene of Wyoming. Journal of Mammalogy 47(3):487-490 [J. Alroy/J. Alroy/J. Alroy]
2183 L. Krishtalka and R. K. Stucky. 1985. Revision of the Eocene Wind River Faunas, Early Eocene of Central Wyoming. Part 7. Revision of Diacodexis (Mammalian, Artiodactyla). Annals of Carnegie Museum 54(14):413-486 [J. Alroy/J. Alroy/J. Marcot]
2336 M. C. Maas and M. O'Leary. 1996. Evolution of molar enamel microstructure in North American Notharctidae (primates). Journal of Human Evolution 31 [J. Alroy/J. Alroy/J. Ju]
6223 A. D. Redline. 1997. Revision of the Wind River faunas, early Eocene of central Wyoming. Part 13. Systematics and phylogenetic pattern of early Eocene Hyopsodus (Mammalia: Condylarthra). Annals of Carnegie Museum 66(1):1-81 [J. Alroy/J. Alroy/J. Alroy]
2975 K. D. Rose, L. Krishtalka, and R. K. Stucky. 1991. Revision of the Wind River faunas, early Eocene of central Wyoming. Part 11. Palaeanodonta (Mammalia). Annals of Carnegie Museum 60(1):63-82 [J. Alroy/J. Alroy/M. Uhen]
26208 R. K. Stucky and T. G. Hardy. 2007. A new large, hypercarnivorous oxyaenid (Mammalia, Creodonta) from the middle Eocene of the Wind River Formation, Natrona County, Wyoming. Bulletin of Carnegie Museum of Natural History 39:57-65 [J. Alroy/J. Alroy]