Raben Ranch: Chadronian, Nebraska

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Leptictis acutidens (Douglass 1902)
(1 measurement)
    = informal Novacek leptictid acutidens
Alroy 2002
Jaywilsonomys sp. Ferrusquia and Wood 1969
    = Jaywilsonomyinae indet.
Alroy 2002
said to be new; could be Pseudocylindrodon and called into question in any event by Emry and Korth 1996a
Mammalia - Multituberculata - Neoplagiaulacidae
Ectypodus sp. Matthew and Granger 1921
(1 measurement)
    = Ectypodus lovei Sloan 1966
Storer 1993
DUPLICATE REF 3312 or 3313 or 3314
Mammalia - Rodentia - Ischyromyidae
Leptotomus sp. Matthew 1910
Ischyromys veterior Matthew 1903
Ischyromys douglassi Black 1968
Mammalia - Rodentia - Pipestoneomyidae
Pipestoneomys bisulcatus Donohoe 1956
Mammalia - Rodentia - Aplodontidae
Prosciurus vetustus (Matthew 1903)
original and current combination Sciurus (Prosciurus) vetustus
Mammalia - Rodentia - Heliscomyidae
Heliscomys vetus Cope 1873
Mammalia - Rodentia - Eomyidae
Adjidaumo minutus (Cope 1873)
Paradjidaumo trilophus (Cope 1873)
recombined as Adjidaumo trilophus
Adjidaumo minimus (Matthew 1903)
Yoderimys sp. Wood 1955
    = Yoderimyinae indet. Wood 1955
Alroy 2002
Centimanomys major Galbreath 1955
Cupressimus storeri n. sp. Ostrander 1983
recombined as Paranamatomys storeri
Aulolithomys bounites Black 1965
Namatomys lloydi Black 1965
this is the "true" Namatomys"
Mammalia - Rodentia - Eutypomyidae
Eutypomys sp. Matthew 1905
    = Eutypomyidae indet. Miller and Gidley 1918
Alroy 2002
said to be new
Mammalia - Rodentia - Castoridae
Agnotocastor sp. Stirton 1935
said to be new
Mammalia - Rodentia
Meliakrouniomys sp. Harris and Wood 1969
Mammalia - Rodentia - Simimyidae
? Simimys sp. Wilson 1935
Mammalia - Rodentia - Cylindrodontidae
Cylindrodon galbreathi Ostrander 1983
    = Cylindrodon nebraskensis Hough and Alf 1956
Alroy 2002
see Galbreath 1983a, Korth 1992c
Pseudocylindrodon neglectus Burke 1935
Mammalia - Lagomorpha - Leporidae
Palaeolagus temnodon Douglass 1902
Megalagus brachyodon (Matthew 1903)
Mammalia - Plagiomenidae
Thylacaelurus montanus Russell 1954
Mammalia - Primates - Omomyidae
Chumashius sp. Stock 1933
Mammalia - Soricidae
Domnina thompsoni Simpson 1941
Domnina gradata Cope 1873
(1 measurement)
Mammalia - Geolabididae
Centetodon hendryi Lillegraven et al. 1981
Centetodon chadronensis Lillegraven et al. 1981
Mammalia - Proscalopidae
Oligoscalops sp. Reed 1961
said to be new
Mammalia - Oligoryctidae
Oligoryctes cameronensis Hough 1956
(1 measurement)
Mammalia - Micropternodontidae
Micropternodus borealis Matthew 1903
Micropternodus montrosensis n. sp. Ostrander 1983
see Ostrander 1983a
Mammalia - Apternodontidae
Apternodus iliffensis Galbreath 1953
    = Apternodus sp. Matthew 1903
Asher et al. 2002
Mammalia - Chiroptera - Vespertilionidae
? Stehlinia sp. Revilliod 1919
a bat
Chadronycteris rabenae n. sp. Ostrander 1983
see Ostrander 1983a; a bat
Mammalia - Perissodactyla - Brontotheriidae
Brontotheriidae indet. (Marsh 1873)
Mammalia - Perissodactyla - Rhinocerotidae
Trigonias sp. Lucas 1900
Mammalia - Perissodactyla - Hyracodontidae
Hyracodon nebraskensis (Leidy 1850)
probably OK because Ostrander also recognizes H. priscidens
Mammalia - Perissodactyla - Equidae
Mesohippus sp. Marsh 1875
    = Equidae indet. Gray 1821
Alroy 2002
Mammalia - Camelidae
Poebrotherium sp. Leidy 1847
Mammalia - Leptochoeridae
Leptochoeridae indet. Marsh 1894
Mammalia - Protoceratidae
Pseudoprotoceras longinaris Cook 1934
Mammalia - Hypisodontidae
Hypisodus minimus (Cope 1873)
Mammalia - Leptomerycidae
Leptomeryx sp. Leidy 1853
may include two species close to L. yoderi and L. speciosus: Heaton and Emry 1996
Mammalia - Merycoidodontidae
Merycoidodon sp. Leidy 1848
Mammalia - Carnivora - Amphicyonidae
Daphoenus sp. Leidy 1853
    = Amphicyonidae indet. Haeckel 1886
Alroy 2002
could be Brachyrhynchocyon
Mammalia - Carnivora - Mustelidae
Mustelidae indet. Fischer 1817
Mammalia - Carnivora - Ursidae
Parictis sp. Scott 1893
Mammalia - Carnivora - Canidae
Hesperocyon sp. Scott 1890
Mammalia - Macroscelidea - Amphilemuridae
Mammalia - Apatemyidae
Apatemys aff. downsi Gazin 1958
Tornow and Arbor 2017
Sinclairella dakotensis Jepsen 1934
(1 measurement)
Mammalia - Pantolestidae
? Pantolestidae indet. Cope 1884
Mammalia - Groeberida
Peratherium fugax (Cope 1873)
corrected as Herpetotherium fugax
Mammalia - Groeberida - Nototheriidae
Nanodelphys minutus McGrew 1937
    = Nanodelphys hunti Cope 1873
Alroy 2002
recombined as Nanodelphys huntii
Idiogenomys ozziei n. gen., n. sp. Ostrander 1983
misspelt "Idogenomys"; genus is Mammalia incertae sedis and unknown elsewhere; type, see Ostrander 1983a
Reptilia - Testudines - Testudinidae
Stylemys sp. Leidy 1851
Reptilia - Testudines - Geoemydidae
Ptychogastrini indet. (De Stefano 1903)
Hutchison 1996 1 specimen
SDSM 10052 "undescribed genus and species"
Reptilia
Peltosaurus sp. Cope 1873
Reptilia - Anguidae
Glyptosaurus sp. Marsh 1871
Reptilia
Aves indet. Linnaeus 1758
Actinopteri - Lepisosteiformes - Lepisosteidae
Lepisosteus sp. Agassiz 1843
Actinopteri - Amiiformes - Amiidae
Amia sp. Linnaeus 1766
see common names

Geography
Country:United States State/province:Nebraska County:Sioux
Coordinates: 42.4° North, 103.8° West (view map)
Paleocoordinates:43.8° North, 95.1° West
Basis of coordinate:based on political unit
Geographic resolution:small collection
Time
Period:Paleogene Epoch:Eocene
Stage:Priabonian 10 m.y. bin:Cenozoic 3
*Period:Tertiary
Key time interval:Chadronian
Age range of interval:37.20000 - 33.90000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Chadron Member:Big Cottonwood Creek
Local section:PineR Local bed:1
Local order:bottom to top
Stratigraphy comments: member assignment based on LaGarry pers. commun. 19 May 2005
Lithology and environment
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection methods:bulk,surface (float),sieve,field collection
Collection size:12000 specimens
Rock censused:1273 kg
Reason for describing collection:taxonomic analysis
Museum repositories:SDSM
Collection method comments: large and small mammals both are "scattered about the surface" but most microvertebrates coming from "Approximately 2,800 pounds of sediment were obtained from three sub-localities... by employing the [standard] screen washing techniques" (Ostrander 1983)
Taxonomic list comments:apparently in the Trunk Butter Member sensu LaGarry and LaGarry 1999
much of this list repeated by Ostrander 1987
entire section is reversed except top 15 feet; could correlate with C15n or C16n: Prothero 1996c
NE 1/4 sec 31 T34N R53W
"Cylindrodon fontis": see discussion of this species by Emry and Korth 1996a
Metadata
Also known as:SDSM V-772
Database number:17014
Authorizer:J. Alroy, P. Holroyd Enterer:J. Alroy, P. Holroyd
Modifier:J. Alroy Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2007-09-08 15:35:28
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

2716. G. E. Ostrander. 1985. Correlation of the early Oligocene (Chadronian) in northwestern Nebraska. Dakoterra 2(2):205-231 [J. Alroy/J. Alroy/P. Holroyd]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
34290 J. H. Hutchison. 1996. Testudines. In D. R. Prothero and R. J. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America 337-353 [J. Alroy/J. Alroy]
3312 J. E. Storer. 1993. Multituberculates of the Lac Pelletier Lower Fauna, Late Eocene (Duchesnean), of Saskatchewan. Canadian Journal of Earth Sciences 30:1613-1617 [J. Alroy/J. Alroy/J. Alroy]
62705 M. A. Tornow and T. A. Arbor. 2017. Apatemyids (Mammalia, Apatotheria) from the middle Chadronian (late Eocene) of Sioux County, Nebraska, USA. Palaeontologia Electronica 20.1.9A:1-16 [P. Holroyd/P. Holroyd/P. Holroyd]