Raben Ranch (Eocene of the United States)

Also known as SDSM V-772

Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.8° N, 95.1° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Big Cottonwood Creek Member (Chadron Formation), Chadronian (37.2 - 33.9 Ma)

• member assignment based on LaGarry pers. commun. 19 May 2005

Environment/lithology: terrestrial

Size classes: macrofossils, mesofossils

Reposited in the SDSM

Collection methods: bulk, surface (float), sieve,

• 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)

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

Purpose of describing collection: taxonomic analysis

PaleoDB collection 17014: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• 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
Actinopteri
 Amiiformes - Amiidae
Amia sp. Linnaeus 1766 bowfin
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp. de Lacep├Ęde 1803 gar
Reptilia
 Testudines - Pantestudinidae
Stylemys sp. Leidy 1851 turtle
 Testudines - Ptychogasteridae
"Ptychogastrini indet." = Ptychogasteridae3
"Ptychogastrini indet." = Ptychogasteridae3 De Stefano 1903 turtle
SDSM 10052 "undescribed genus and species"
Aves
  -
Aves indet. Linnaeus 1758 bird
Reptilia
 Squamata -
Peltosaurus sp. Cope 1872 lizard
 Squamata - Anguidae
Glyptosaurus sp. Marsh 1871 lizard
Mammalia
 Cimolesta - Pantolestidae
? Pantolestidae indet. Cope 1884 eutherian
 Primates - Omomyidae
Chumashius sp. Stock 1933 tarsier
 Tribosphenida - Plagiomenidae
Thylacaelurus montanus Russell 1954 placental
 Rodentia -
Meliakrouniomys sp. Harris and Wood 1969 rodent
 Rodentia - Simimyidae
? Simimys sp. Wilson 1935 rodent
 Rodentia - Pipestoneomyidae
Pipestoneomys bisulcatus Donohoe 1956 rodent
 Rodentia - Aplodontidae
Prosciurus vetustus Matthew 1903 mountain beaver
 Rodentia - Eomyidae
Namatomys lloydi Black 1965 rodent
this is the "true" Namatomys"
Paradjidaumo trilophus Cope 1873 rodent
Centimanomys major Galbreath 1955 rodent
"Cupressimus storeri n. sp." = Paranamatomys storeri Ostrander 1983 rodent
Yoderimyinae indet.1 Wood 1955 rodent
Adjidaumo minimus Matthew 1903 rodent
Adjidaumo minutus Cope 1873 rodent
Aulolithomys bounites Black 1965 rodent
 Rodentia - Heliscomyidae
Heliscomys vetus Cope 1873 rodent
 Rodentia - Castoridae
Agnotocastor sp. Stirton 1935 beaver
said to be new
 Rodentia - Eutypomyidae
Eutypomyidae indet.1 Miller and Gidley 1918 rodent
 Rodentia - Ischyromyidae
Ischyromys veterior Matthew 1903 rodent
Ischyromys douglassi Black 1968 rodent
Leptotomus sp. Matthew 1910 rodent
 Rodentia - Cylindrodontidae
Pseudocylindrodon neglectus Burke 1935 rodent
Cylindrodon nebraskensis1 Hough and Alf 1956 rodent
 Lagomorpha - Leporidae
Palaeolagus temnodon Douglass 1902 rabbit
Megalagus brachyodon Matthew 1903 rabbit
 Lipotyphla - Geolabididae
Centetodon chadronensis Lillegraven et al. 1981 placental
Centetodon hendryi Lillegraven et al. 1981 placental
 Perissodactyla - Brontotheriidae
Brontotheriidae indet. Marsh 1873 brontothere
 Perissodactyla - Hyracodontidae
Hyracodon nebraskensis Leidy 1850 odd-toed ungulate
probably OK because Ostrander also recognizes H. priscidens
 Perissodactyla - Rhinocerotidae
Trigonias sp. Lucas 1900 rhinoceros
 Perissodactyla - Equidae
Equidae indet.1 Gray 1821 horse
 Tribosphenida - Heterosoricidae
Domnina gradata Cope 1873 placental
Domnina thompsoni Simpson 1941 placental
 Tribosphenida - Proscalopidae
Oligoscalops sp. Reed 1961 placental
said to be new
 Tribosphenida - Apternodontidae
Oligoryctes cameronensis Hough 1956 placental
Apternodus sp.2 Matthew 1903 placental
 Tribosphenida - Micropternodontidae
Micropternodus borealis Matthew 1903 placental
Micropternodus montrosensis n. sp. Ostrander 1983 placental
see Ostrander 1983a
 Carnivora - Ursidae
Parictis sp. Scott 1893 bear
 Carnivora - Amphicyonidae
Amphicyonidae indet.1 Haeckel 1886 bear-dog
 Carnivora - Mustelidae
Mustelidae indet. Fischer 1817 mustelid carnivore
 Carnivora - Canidae
Hesperocyon sp. Scott 1890 canid
 Macroscelidea - Amphilemuridae
Ankylodon sp. Patterson and McGrew 1937 elephant shrew
 Chiroptera - Vespertilionidae
? Stehlinia sp. Revilliod 1919 vesper bat
a bat
Chadronycteris rabenae n. sp. Ostrander 1983 vesper bat
see Ostrander 1983a; a bat
 Ungulata - Leptochoeridae
Leptochoeridae indet. Marsh 1894 even-toed ungulate
 Ungulata - Camelidae
Poebrotherium sp. Leidy 1847 camel
 Ungulata - Merycoidodontidae
Merycoidodon sp. Leidy 1848 oreodont
 Ungulata - Protoceratidae
Pseudoprotoceras longinaris Cook 1934 protoceratid
 Ungulata - Hypisodontidae
Hypisodus minimus Cope 1873 ruminant
 Ungulata - Leptomerycidae
Leptomeryx sp. Leidy 1853 ruminant
may include two species close to L. yoderi and L. speciosus: Heaton and Emry 1996
 Insectivora - Apatemyidae
Apatemys aff. downsi5 Gazin 1958 insectivoran
Sinclairella dakotensis Jepsen 1934 insectivoran
 Theriiformes -
Idiogenomys ozziei n. gen. n. sp.
Idiogenomys ozziei n. gen. n. sp. Ostrander 1983 metatherian
misspelt "Idogenomys"; genus is Mammalia incertae sedis and unknown elsewhere; type, see Ostrander 1983a
 Theriiformes - Peradectidae
Nanodelphys hunti1 Cope 1873 metatherian
 Theriiformes - Herpetotheriidae
Peratherium fugax Cope 1873 marsupial
 Multituberculata - Neoplagiaulacidae
Ectypodus lovei4 Sloan 1966 multituberculate