Cedar Creek (Oligocene of the United States)

Where: Logan County County, Colorado (40.7° N, 103.2° W: paleocoordinates 41.9° N, 95.3° W)

• coordinate based on political unit

When: Oreodon beds zone, Brule Formation (White River Group), Orellan (33.9 - 33.3 Ma)

• 'Oreodon beds, White River Formation, Oligocene'

•= Brule Formation (Hoganson et al. 1998)

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Collected by E. D. Cope in 1873

Primary reference: C. W. Gilmore. 1928. Fossil lizards of North America. Memoirs of the National Academy of Sciences 22(3):1-201 [J. Head/J. Head/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 118198: authorized by Roger Benson, entered by Roger Benson on 08.10.2011, edited by Terri Cleary and Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Squamata - Xenosauridae
Exostinus serratus n. gen. n. sp.
Exostinus serratus n. gen. n. sp. Cope 1873 squamates
AMNH 1608 (holotype), skull fragments
 Squamata -
Peltosaurus granulosus n. sp. Cope 1873 squamates
AMNH 1610 (holotype), premaxilla, partial maxilla, left jugal, coosified frontals, other skull fragments, three vertebrae, many dermal scutes, ribs; KU 1278, portions of right dentary (coll. Martin 1911)
 Squamata - Iguanidae
Aciprion formosum n. gen. n. sp.
Aciprion formosum n. gen. n. sp. Cope 1873 squamates
AMNH 1609 (holotype), dentary
 Squamata - Boidae
Calamagras angulatus n. sp.2 Cope 1873 dwarf boa
AMNH 1654, single vertebra
Calamagras talpivorus n. sp.2 Cope 1873 dwarf boa
AMNH 1598, three vertebrae
Calamagras murivorus n. gen. n. sp.2 Cope 1873 dwarf boa
AMNH 1603, six articulated vertebrae. Co-types (2) of C. truxalis likely also from this area: AMNH 1603, 1657, plus AMNH 1658, all vertebrae "from the beds of the White River epoch in northeast Colorado"
Neurodromicus dorsalis n. gen. n. sp.2 Cope 1873 boa
AMNH 1599, single anterior thoracic vertebra
 Squamata -
Cremastosaurus carinicollis n. gen. n. sp. Cope 1873 lizard
AMNH 1604, intercentrum of atlas, axis, and four succeeding cervicals articulated
Mammalia
 Perissodactyla - Hyracodontidae
"Hyracodon arcidens n. sp." = Hyracodon nebraskensis1
"Hyracodon arcidens n. sp." = Hyracodon nebraskensis1 Leidy 1850 odd-toed ungulate
AMNH 6309