Saddle: Tiffanian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Anguidae
Glyptosaurinae indet. Marsh 1872
ElShafie 2024
Mammalia - Proteutheria - Palaeoryctidae
Pararyctes pattersoni n. sp. Van Valen 1966
Van Valen 1966
(1 measurement)
Mammalia - Phenacodontidae
Gidleyina cf. wyomingensis Gazin 1956
    = Ectocion cf. collinus Russell 1929
Alroy 2002
? Phenacodus bisonensis n. sp. Gazin 1956
Mammalia - Procreodi - Arctocyonidae
Thryptacodon cf. demari Gazin 1956
    = Thryptacodon orthogonius Russell 1929
Scott et al. 2002
Thryptacodon belli n. sp. Gazin 1956
synonym of Thryptacodon orthogonius
Claenodon ferox (Cope 1883)
    = Arctocyon cf. ferox Cope 1883
Alroy 2002
Claenodon acrogenius n. sp. Gazin 1956
recombined as Arctocyon acrogenius
Claenodon montanensis (Gidley 1919)
    = Arctocyon cf. montanensis Gidley 1919
Alroy 2002
synonym of Arctocyon corrugatus
Claenodon procyonoides (Matthew 1937)
    = Colpoclaenus cf. procyonoides Matthew 1937
Alroy 2002
Chriacus sp. Cope 1883
small
Chriacus pelvidens (Cope 1881)
Tricentes fremontensis n. sp. Gazin 1956
recombined as Mimotricentes fremontensis
(1 measurement)
Mammalia - Viverravidae
Didymictis tenuis Simpson 1935
    = Simpsonictis tenuis Simpson 1935
Alroy 2002
described by MacIntyre 1966 and confirmed by Fox and Youzwyshyn 1994
Mammalia - Primates - Palaechthonidae
Plesiolestes sirokyi n. sp. Szalay 1973
Szalay 1973
recombined as Torrejonia sirokyi
(1 measurement)
Mammalia - Primates - Plesiadapidae
Nannodectes gazini n. sp. Gingerich 1975
Gingerich 1975
includes "Pronothodectes cf. matthewi" and "P. cf. simpsoni" (6 measurements)
Plesiadapis jepseni Gazin 1956
synonym of Plesiadapis anceps
NOT the type (1 measurement)
Mammalia - Primates - Picrodontidae
Picrodus cf. silberlingi Douglass 1908
McGrew and Patterson 1962
    = Picrodus canpacius Scott and Fox 2005
Scott and Fox 2005
Mammalia - Macroscelidea - Apheliscidae
Litomylus scaphiscus Gazin 1956
1 specimen
synonym of Litomylus dissentaneus
Litomylus scaphicus n. sp. Gazin 1956
Haplaletes pelicatus n. sp. Gazin 1956
Mammalia - Macroscelidea
Litolestes lacunatus Gazin 1956
    = cf. Litocherus lacunatus Gazin 1956
Alroy 2002
Mammalia - Condylarthra - Hyopsodontidae
Promioclaenus pipiringosi n. sp. Gazin 1956
? Protoselene novissimus n. sp. Gazin 1956
Mammalia - Condylarthra - Mioclaenidae
Promioclaenus sp. Trouessart 1904
    = Mioclaenidae indet. Osborn and Earle 1895
Alroy 2002
synonym of Hyopsodontidae
Mammalia - Condylarthra
Desmatoclaenus mearae Van Valen 1978
Van Valen 1978
Mammalia - Pentacodontidae
Bisonalveus browni n. gen., n. sp. Gazin 1956
3 specimens
USNM 20928-20930
Mammalia - Pantolambdidae
Caenolambda pattersoni n. gen., n. sp. Gazin 1956
Mammalia - Apatemyidae
Labidolemur major n. sp. West 1972
West 1972
DUPLICATE REF 3593 or 3594 (1 measurement)
Mammalia - Leptictidae
Diacodon pearcei n. sp. Gazin 1956
1 specimen
synonym of Prodiacodon concordiarcensis
USNM 20970
Mammalia
Peradectes elegans Matthew and Granger 1921
Peradectes pauli n. sp. Gazin 1956
2 specimens
synonym of Peradectes elegans
USNM 20879-80
Mammalia - Multituberculata - Cimolodontidae
Anconodon russelli (Simpson 1935)
    = Anconodon cochranensis Russell 1929
Sloan 1987
Mammalia - Multituberculata - Ptilodontidae
Ptilodus sp. Cope 1881
Gunnell 1994
"P. sp. C"; presumably includes "cf. P. montanus"
Ectypodus hazeni Jepsen 1940
    = cf. Neoplagiaulax hazeni Jepsen 1940
Alroy 2002
    = Ptilodus gnomus Scott et al. 2002
Scott et al. 2002
Mammalia - Multituberculata - Neoplagiaulacidae
cf. Ectypodus musculus Matthew and Granger 1921
Mesodma pygmaea Sloan 1987
Sloan 1987
see common names

Geography
Country:United States State/province:Wyoming County:Fremont
Coordinates: 42.3° North, 108.2° West (view map)
Paleocoordinates:48.1° North, 88.5° West
Basis of coordinate:stated in text
Time
Period:Paleogene Epoch:Paleocene
10 m.y. bin:Cenozoic 1
*Period:Tertiary
Key time interval:Tiffanian
Age range of interval:60.90000 - 56.20000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Local section:Saddl Local bed:1
Local order:bottom to top
Lithology and environment
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Collection methods and comments
Collection methods:bulk,sieve
Collection size:134 specimens
Reason for describing collection:taxonomic analysis
Collection method comments: new material of West 1972 part of an "intensively screen-washed" collection made in 1969 by F. S. Szalay
Taxonomic list comments:part of "Bison Basin" list of Russell 1967a
see Gingerich 1976 for discussion of stratigraphy
Metadata
Also known as:Discovery
Database number:14989
Authorizer:J. Alroy, P. Holroyd, M. Carrano Enterer:J. Alroy, M. Carrano, P. Holroyd
Modifier:J. Alroy Research group:vertebrate
Created:1993-09-27 00:00:00 Last modified:2007-09-08 20:14:32
Access level:the public Released:1993-09-27 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
1609. C. L. Gazin. 1956. Palaeocene mammalian faunas of the Bison Basin in south-central Wyoming. Smithsonian Miscellaneous Collections 131(6):1-57 [J. Alroy/J. Alroy/M. Carrano]

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]
1634 P. D. Gingerich. 1975. New North American Plesiadapidae (Mammalia, Primates) and a biostratigraphic zonation of the middle and upper Paleocene. Contributions from the Museum of Paleontology, University of Michigan 24(13):135-148 [J. Alroy/J. Alroy/M. Uhen]
1730 G. F. Gunnell. 1989. Evolutionary History of Microsyopoidea (Mammalia, ?Primates) and the Relationship Between Plesiadapiformes and Primates. University of Michigan Papers on Paleontology 27:1-157 [J. Alroy/J. Alroy/P. Mannion]
1731 G. F. Gunnell. 1994. Paleocene mammals and faunal analysis of the Chappo Type Locality (Tiffanian), Green River Basin, Wyoming. Journal of Vertebrate Paleontology 14(1):81-104 [J. Alroy/J. Alroy/J. Alroy]
2525 P. O. McGrew and B. Patterson. 1962. A new picrodontid insectivore(?) from the Paleocene of Wyoming. Breviora 175:1-9 [J. Alroy/J. Alroy/J. Alroy]
14679 C. S. Scott and R. C. Fox. 2005. Windows on the evolution of Picrodus (Plesiadapiformes: Primates): morphology and relationships of a species complex from the Paleocene of Alberta. Journal of Paleontology 79(4):635-657 [J. Alroy/J. Alroy]
3196 R. E. Sloan. 1987. Paleocene and latest Cretaceous mammal ages, biozones, magnetozones, rates of sedimentation, and evolution. Geological Society of America Special Paper 209:165-200 [J. Alroy/J. Alroy/M. Uhen]
3351 F. S. Szalay. 1973. New Paleocene Primates and a diagnosis of the new suborder Paromomyiformes. Folia Primatologica 19:73-87 [J. Alroy/J. Alroy/K. Beard]
3482 L. Van Valen. 1966. Deltatheridia, a new order of Mammals. Bulletin of the American Museum of Natural History 132(1):1-126 [J. Alroy/J. Alroy/M. Carrano]
3485 L. M. Van Valen. 1978. The beginning of the Age of Mammals. Evolutionary Theory 4:45-80 [J. Alroy/J. Alroy/M. Carrano]
3593 R. M. West. 1972. Annals of Carnegie Museum 44(3) [J. Alroy/J. Alroy]