Red Basin (UOloc 2495)
Basic information
Sample name: Red Basin (UOloc 2495)
Reference: J. A. Shotwell. 1968. Miocene mammals of southeast Oregon. Bulletin of the Museum of Natural History, University of Oregon 14:1-67 [ER 3992]
Geography
Country: United States
State: Oregon
Coordinate: 43° 37' N, 117° 47' W
Coordinate basis: estimated from map
Formation: Butte Creek Volcanic Sandstone
Time interval: Middle Miocene
Geography comments: just above a "dry wash in the northern half of Red Basin"
coordinate based on the map in Fig. 8
Evernden et al. (1964) provide a K-Ar date on sanidine of 15.1 Ma for this unit
the fauna is clearly early Barstovian and therefore Langhian, within the Middle Miocene
coordinate based on the map in Fig. 8
Evernden et al. (1964) provide a K-Ar date on sanidine of 15.1 Ma for this unit
the fauna is clearly early Barstovian and therefore Langhian, within the Middle Miocene
Environment
Lithology: sandstone
Habitat comments: the "unweathered sediment" was "well consolidated"
assumed to be sandstone based on the stratigraphic unit
assumed to be sandstone based on the stratigraphic unit
Methods
Life forms: carnivores,rodents,ungulates,other small mammals
Sampling methods: quarry
Sample size: 256 specimens
Years: 1961
Sampling comments: the site was excavated and sediment was screened
Metadata
Sample number: 4408
Contributor: John Alroy
Enterer: John Alroy
Created: 2024-10-22 11:53:04
Modified: 2024-10-22 11:53:04
Abundance distribution
28 species
10 singletons
total count 256
extrapolated richness: 54.6
Fisher's α: 8.011
geometric series k: 0.8540
Hurlbert's PIE: 0.8668
Shannon's H: 2.4868
Good's u: 0.9610
Each square represents a species. Square sizes are proportional to counts.
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Register
| Lanthanotherium sp. | 1 | |
| Mystipterus cf. pacificus | 1 | |
| "Mystipterus pacificus": see Hutchison 1968 | ||
| Scalopoides cf. ripafodiator | 71 | |
| "Scalopoides ripofodiator": see Hutchison 1968 | ||
| Scapanoscapter simplicidens | 15 | |
| Hutchison 1968 | ||
| Scalopini sp. A | 4 | |
| Achlyoscapter longirostris | 1 | |
| Hutchison 1968 | ||
| Paradomnina relictus | 10 | |
| Hutchinson 1966: type | ||
| Pseudotrimylus sp. | 2 | |
| "Heterosorex sp.": see Hutchinson 1966 | ||
| Alluvisorex arcadentes | 1 | |
| Hutchinson 1966 | ||
| Limnoecus sp. | 1 | |
| Hutchinson 1966 | ||
| Protospermophilus malheurensis | 15 | |
| Spermophilus tephrus | 38 | |
| Sciuridae indet. | 1 | |
| "Eutamias sp.": probably Neotamias | ||
| Petauristodon sp. | 5 | |
| "Sciuropterus sp." | ||
| Eucastor typicus | 7 | |
| "Monosaulax typicus": type | ||
| Pseudotheridomys pagei | 1 | |
| see Shotwell 1967b | ||
| Balantiomys oregonensis | 15 | |
| "Peridiomys oregonensis": minimum count, other molars may exist; see Shotwell 1967b | ||
| Tephrocyon rurestris | 10 | |
| "Tomarctus rurestris": at least five specimens; also includes at least five specimens of "T. kelloggi", see Wang et al. 1999 | ||
| Amphicyon cf. frendens | 2 | |
| Mustelidae indet. | 1 | |
| "Brachypsalis sp." | ||
| Pseudaelurus sp. | 3 | |
| Hypohippus cf. osborni | 3 | |
| Acritohippus isonesus | 34 | |
| "Merychippus seversus": this is following the diagnosis of Downs 1956, which applies to A. isonesus according to Hulbert and MacFadden 1991; i.d. seems OK based on large size of specimen, general agreement with type as illustrated by Osborn 1918; JA pers. obs. 5.6.94; count is based on 30 upper teeth and four illustrated jaws only, lowers are not enumerated | ||
| Merychippus cf. brevidontus | 1 | |
| Aphelops sp. | 2 | |
| said to be both from UO 2493 and from UOloc 2495, but the former is almost certainly a typo | ||
| Ticholeptus zygomaticus | 1 | |
| "T. cf. obliquidens" | ||
| Dromomeryx borealis | 6 | |
| count is a minimum and represents illustrated or specifically discussed and numbered specimens | ||
| Bouromeryx cf. americanus | 4 | |
| "Rakomeryx cf. americanus": count is of measured specimens only | ||