Sheep Creek Formation

Sheep Creek Formation
Stratigraphic range: Neogene
Fossil horse head from the Sheep Creek Formation (Miocene; Nebraska)
TypeFormation
Location
RegionNebraska
CountryUnited States

The Sheep Creek Formation is a geologic formation in Nebraska. It preserves fossils dating back to the Neogene period.

List of Fossil Species

Birds

Accipitriformes

Genus Species Family Stratigraphic Position Material Notes Images
Neophrontops[1] N. vetustus Accipitridae middle[1]
Urubitinga [1] U. enecta Accipitridae middle[1]

Charadriiformes

Genus Species Family Stratigraphic Position Material Notes Images
Burhinus [1] B. lucorum Burhinidae middle[1]

Falconiformes

Genus Species Family Stratigraphic Position Material Notes Images
Pediohierax [1] P. ramenta Falconidae middle[1]

Gruiformes

Genus Species Family Stratigraphic Position Material Notes Images
Aramornis [1] A. longurio Aramidae middle[1]

Psittaciformes

Genus Species Family Stratigraphic Position Material Notes Images
Conuropsis [1] C. fratercula Psittacidae middle[1]

Mammals

Artiodactyls

Genus Species Family Stratigraphic Position Material Notes Images
Merycodus[1] [2] M. minor Antilocapridae middle[1]
M. sabulonis lower[2]
Paracosoryx[3] P. wilsoni Antilocapridae lower[2]
Paramiolabis [1] P. tenuis Camelidae middle[1]
Protolabis [1] P. saxeus Camelidae middle[1]
Pseudoparablastomeryx[1] P. scotti Hypertragulidae middle[1]
Brachycrus [1] B. buwaldi Merycoidodontidae middle[1]lower[2]
B. wilsoni lower[2]
Merychyus [1] M. relictus Merycoidodontidae middle[1]lower[2]
Blastomeryx [1] B. gemmifer Moschidae middle[1]lower[2]
B. antilopinus middle[1]lower[2]
Bouromeryx [1] B. americanus Palaeomerycidae middle[1]lower[2]
B. submilleri lower[2]
Sinclairomeryx[1] S. riparius Palaeomerycidae middle[1]lower[2]
Lambdoceras[1] L. sp Protoceratidae middle[1]
Hesperhys[1] H. vagrans Tayassuidae middle[1]
Platygonus[1] P. pollenae Tayassuidae middle[1]
Prosthennops[1] P. xiphodonticus Tayassuidae middle[1]

Carnivorans

Genus Species Family Stratigraphic Position Material Notes Images
Amphicyon[1] A. frendens Amphicyonidae middle[1]
Cynelos

[1]

 C. idoneus Amphicyonidae middle[1]
Pliocyon[1] P. sp Amphicyonidae middle[1]
Cynarctoides[1] C. acridens Canidae middle[1]lower[2]
Leptocyon L. leidyi Canidae middle[1]lower[2]
Osbornodon[1] O. fricki Canidae middle[1]lower[2]
Protomarctus [1] P. optatus Canidae middle[1]lower[2]
Pseudaelurus[1] P. intrepidus Felidae middle[1]
P. validus middle[1]lower[2]
Brachypsalis B. matutinus Mustelidae middle[1]
Dinogale D. siouxensis Mustelidae middle[1]
Mionictis M. letifer Mustelidae middle[1]

Perissodactyla

Genus Species Family Stratigraphic Position Material Notes Images
Tylocephalonyx[1] T. skinneri Chalicotheridae middle[1]lower[2]
Acritohippus

[1]

 A. tertius Equidae middle[1]lower[2]
Archaeohippus [1] A. penultimus Equidae middle[1]lower[2]
Merychippus[1] M. primus Equidae middle[1]lower[2]
Aphelops [1] A. megalodum Rhinocerotidae middle[1]lower[2]
Peraceras[1] P. profectum Rhinocerotidae middle[1]
Teleoceras[1] T. americanum Rhinocerotidae middle[1]lower[2]

Eulipotyphla

Genus Species Family Stratigraphic Position Material Notes Images
Scalopoides [3] S. isodens Talpidae
Mesoscalops[3] M. scopelotemos Proscalopidae
Brachyerix [2] B. macrotis Erinaceidae lower[2]

Chiroptera

Genus Species Family Stratigraphic Position Material Notes Images
Myotis [3] M. sp Vespertilionidae

Lagomorpha

Genus Species Family Stratigraphic Position Material Notes Images
Hypolagus[3] H. sp Leporidae
Oreolagus O. nebrascensis Ochotonidae

Rodentia

Genus Species Family Stratigraphic Position Material Notes Images
Alphagaulus [1] A. vetus Mylagaulidae middle[1]
Galbreathia [1] G. novellus Mylagaulidae middle[1]
Harrymys[3] H. magnus Heteromyidae
Peridiomys [3] P. rusticus Heteromyidae
Miospermophilus[3] M. wyomingensis Sciuridae
Protospermophilus[3] P. kelloggi Sciuridae
Schaubeumys[3] S. sabrae Zapodidae

Reptiles

Testudines

Genus Species Family Stratigraphic Position Material Notes Images
Hesperotestudo [1] H. angusticeps Testudinidae middle[1]

See also

References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 "SHEEPCREEK - middle, Sioux County, Nebraska, USA". mindat.org. Retrieved 2026-08-22.{{cite web}}: CS1 maint: url-status (link)
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 "SHEEPCREEK - lower, Sioux County, Nebraska, USA". mindat.org. Retrieved 2026-08-24.{{cite web}}: CS1 maint: url-status (link)
  3. 1 2 3 4 5 6 7 8 9 10 "SHEEPCREEK, Sioux County, Nebraska, USA". mindat.org.{{cite web}}: CS1 maint: url-status (link)
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