Cameron Spring (Eocene of the United States)

Also known as Locality 19; Cameron Springs

Where: Fremont County, Wyoming (43.2° N, 108.2° W: paleocoordinates 44.8° N, 99.5° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: White River Formation, Chadronian (37.2 - 33.9 Ma)

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Primary reference: F. B. Van Houten. 1964. Tertiary geology of the Beaver Rim area, Fremont and Natrona Counties, Wyoming. United States Geological Survey Bulletin 1164:1-99 [J. Alroy/J. Alroy/J. Ju]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 16920: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Chris Bell and Terri Cleary

Creative Commons license: CC BY (attribution)

Taxonomic list

• well to the east of the main Beaver Divide field area
fauna originally described by Hough 1956
unclassified
  -
"Novacek leptictid" acutidens4
pers. commun. 16.2.00
Reptilia
 Squamata - Anguidae
Helodermoides tuberculatus6 Douglass 1903 squamates
AMNH 3779, incomplete ramus; TT 1344, nearly complete skull and jaws
 Squamata - Hyporhinidae
Hyporhina tertia2 Berman 1972 worm lizard
Mammalia
 Creodonta - Hyaenodontidae
Hyaenodon sp. Laizer and Parieu 1838 creodont
 Carnivora - Canidae
"Pseudocynodictis cf. paterculus" = Hesperocyon gregarius
"Pseudocynodictis cf. paterculus" = Hesperocyon gregarius Cope 1873 canid
 Perissodactyla - Equidae
"Mesohippus cf. montanensis" = Mesohippus westoni
"Mesohippus cf. montanensis" = Mesohippus westoni Cope 1889 anchitheriine horse
 Perissodactyla - Rhinocerotidae
Subhyracodon sp.1 Wood 1927 rhinoceros
Trigonias sp. Lucas 1900 rhinoceros
 Perissodactyla - Hyracodontidae
Hyracodon sp. Leidy 1856 odd-toed ungulate
 Perissodactyla - Brontotheriidae
Menodus heloceras Cope 1873 brontothere
 Artiodactyla - Merycoidodontidae
Bathygenys alpha, "Merycoidodon culbertsoni" = Merycoidodon culbertsonii, "Merycoidodon gracilis" = Miniochoerus gracilis
Bathygenys alpha Douglass 1902 oreodont
"Merycoidodon culbertsoni" = Merycoidodon culbertsonii Leidy 1848 oreodont
"Merycoidodon gracilis" = Miniochoerus gracilis Leidy 1851 oreodont
 Artiodactyla - Leptomerycidae
Leptomeryx sp. Leidy 1853 ruminant
presumably OK because Hough listed "L. mammifer"
Leptomeryx esulcatus Cope 1889 ruminant
 Theriamorpha - Micropternodontidae
Micropternodus borealis5 Matthew 1903 placental
 Theriamorpha - Oligoryctidae
Oligoryctes cameronensis Hough 1956 placental
 Rodentia - Sciuridae
? Cedromus sp. Wilson 1949 squirrel
 Rodentia - Ischyromyidae
"Titanotheriomys veterior" = Ischyromys veterior
"Titanotheriomys veterior" = Ischyromys veterior Matthew 1903 rodent
 Rodentia - Cylindrodontidae
? Pseudocylindrodon sp. Burke 1935 rodent
Cylindrodon cf. natronensis3 Emry and Korth 1996 rodent
 Lagomorpha - Leporidae
Megalagus brachyodon Matthew 1903 rabbit
Palaeolagus temnodon Douglass 1902 rabbit
 Didelphimorphia - Didelphidae