Stage Hill II: Harrisonian, Nebraska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Lagomorpha
- Leporidae
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Archaeolagus sp.
Dice 1917
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Mammalia
- Lagomorpha
- Ochotonidae
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Gripholagomys lavocati
Green 1972
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Mammalia
- Rodentia
- Sciuridae
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Miospermophilus sp.
Black 1963
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Protospermophilus sp.
Gazin 1930
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Mammalia
- Rodentia
- Mylagaulidae
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Promylagaulus riggsi
McGrew 1941
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Mammalia
- Rodentia
- Florentiamyidae
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cf. Florentiamys sp.
Wood 1936
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Mammalia
- Rodentia
- Zapodidae
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Schaubeumys sp.
Wood 1935
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Mammalia
- Rodentia
- Cricetidae
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Leidymys sp.
Wood 1936
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Paciculus sp.
Cope 1879
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Mammalia
- Rodentia
- Allomyidae
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Alwoodia sp.
Rensberger 1983
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Mammalia
- Rodentia
- Castoridae
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Palaeocastor sp.
Leidy 1869
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Mammalia
- Rodentia
- Heteromyidae
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Harrymys sp.
Munthe 1988
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Bailey 1999 | |||||||||
| said to be new by Bailey 2004 | ||||||||||
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Dikkomys sp.
Wood 1936
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Bailey 1999 | |||||||||
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= Dikkomys matthewi
Wood 1936
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Bailey 2004 | |||||||||
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Cupidinimus sp.
Wood 1935
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Mammalia
- Rodentia
- Entoptychidae
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Entoptychus grandiplanus
Korth 1992
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Gregorymys formosus
(Matthew 1907)
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Mammalia
- Soricidae
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Limnoecus sp.
Stirton 1930
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Mammalia
- Talpidae
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Mystipterus sp.
Hall 1930
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Mammalia
- Proscalopidae
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Proscalops secundus
Matthew 1909
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Mammalia
- Erinaceidae
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Parvericius sp.
Koerner 1940
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Mammalia
- Protoceratidae
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Syndyoceras cooki
Barbour 1905
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Mammalia
- Moschidae
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Pseudoblastomeryx sp.
Tedford et al. 1987
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= Pseudoblastomeryx advena
Matthew 1907
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Prothero 2008 | |||||||||
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Mammalia
- Palaeomerycidae
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Barbouromeryx sp.
Frick 1937
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| said to be new | ||||||||||
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Mammalia
- Merycoidodontidae
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Merychyus cf. siouxensis
Loomis 1924
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| synonym of Paramerychyus harrisonensis | ||||||||||
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Mammalia
- Anthracotheriidae
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Arretotherium acridens
Douglass 1902
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Mammalia
- Perissodactyla
- Tapiridae
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Miotapirus harrisonensis
Schlaikjer 1937
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Mammalia
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Herpetotherium youngi
(McGrew 1937)
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Nebraska | County: | Scotts Bluff |
| Coordinates: | 41.7° North, 103.7° West (view map) | ||||
| Paleocoordinates: | 42.6° North, 98.7° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Altitude: | 4519 feet | ||||
| Geographic resolution: | outcrop |
Time
| 10 m.y. bin: | Cenozoic 4-5 | ||
| *Period: | Tertiary | *Epoch: | Miocene | *Local age/stage: | Late/Upper Arikareean |
| Key time interval: | Harrisonian | ||
| Age range of interval: | 23.10000 - 18.50000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Arikaree | Formation: | Wildcat Hills Beds | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: "late late Arikareean" (= Harrisonian) "upper Arikaree Group" | |||||
Lithology and environment
| Primary lithology: | conglomerate |
| Secondary lithology: | bioturbation,fine sandstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: "A one-meter thick lateral accretion gravel was the principal source of vertebrate remains; however, several well preserved mammal jaws were recovered from an overlying bioturbated fine-grained sandstone" | |
| Environment: | fluvial indet. |
| Geology comments: "high energy fluvial environment" | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
| Preservation of anatomical detail: | poor |
| Disassociated major elements: | some |
| Disassociated minor elements: | many |
Collection methods and comments
| Collection methods: | bulk,sieve,field collection |
| Minimum sieve size: | 1.600 |
| Rock censused: | 650 kg |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | UNSM |
| Collection method comments: rock censused is "gravel concentrate," not the original sediment | |
| Taxonomic list comments:"fish, rare with low diversity; reptiles, frequent with moderate diversity; birds, rare; and mammals, common with high diversity. No identifiable amphibian remains..." fauna briefly mentioned by Bailey 1999; all details are from Bailey 2004 | |
Metadata
| Also known as: | UNSM Sf-105 | ||
| Database number: | 17843 | ||
| Authorizer: | J. Alroy, J. Marcot | Enterer: | J. Alroy, J. Marcot |
| Modifier: | J. Alroy | Research group: | vertebrate |
| Created: | 1999-10-13 00:00:00 | Last modified: | 2006-11-30 00:41:42 |
| Access level: | the public | Released: | 1999-10-13 00:00:00 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 19303. | B. E. Bailey. 2004. Biostratigraphy and biochronology of early Arikareean through late Hemingfordian small mammal faunas from the Nebraska Panhandle and adjacent areas. Paludicola 4(3):81-113 [J. Alroy/J. Alroy] |
Secondary references:
| 975 | B. E. Bailey. 1999. New Arikareean/Hemingfordian micromammal faunas from western Nebraska and their biostratigraphic significance. Journal of Vertebrate Paleontology 19(3, suppl.):30A-31A [J. Alroy/J. Alroy/M. Uhen] | |
| 51375 | D. R. Prothero. 2008. Systematics of the musk deer (Artiodactyla: Moschidae: Blastomerycinae) from the Miocene of North America. In S. G. Lucas, G. S. Morgan, J. A. Spielmann, D. R. Prothero (eds.), Neogene Mammals 44:207-223 [J. Marcot/J. Marcot/J. Marcot] |