Shengou (CD 0227)
Basic information
Sample name: Shengou (CD 0227)
Reference: Z.-D. Qiu and Q. Li. 2008. Late Miocene micromammals from the Qaidam Basin in the Qinghai-Xizang Plateau. Vertebrata PalAsiatica 46(4):284-306 [ER 4068]
Geography
Country: China
State: Qinghai
Coordinate: 37° 56' N, 97° 14' E
Latlng basis: stated in text
Scale: quarry
Formation: Youshashan
Time interval: Late Miocene
Zone: MN10
Geography comments: "about 50 km southwest of Delingha"
exact coordinate said to be 36º56'96.0"N, 97º14'21.5"E (entered with second omitted because the first value is clearly in error)
"very likely" correlated with "the lower part of the Bahe Formation of Shaanxi" and so "most probably" early Baodean and therefore "late MN10" but "a very early MN11 equivalence... cannot be excluded"
exact coordinate said to be 36º56'96.0"N, 97º14'21.5"E (entered with second omitted because the first value is clearly in error)
"very likely" correlated with "the lower part of the Bahe Formation of Shaanxi" and so "most probably" early Baodean and therefore "late MN10" but "a very early MN11 equivalence... cannot be excluded"
Environment
Lithology: sandstone
Taphonomic context: fluvial deposit
Habitat comments: the formation is "a series of fluvial deposits"
layer 3 consists of "Grayish brown sandstones and mudstones" and the fossils are from "muddy sandstones in the lower part" that have "clear cross bedding" underlain by "iron-calcareous cemented" sandstones
layer 3 consists of "Grayish brown sandstones and mudstones" and the fossils are from "muddy sandstones in the lower part" that have "clear cross bedding" underlain by "iron-calcareous cemented" sandstones
Methods
Life forms: rodents, other small mammals
Excluded forms: turtles, fishes
Sampling methods: quarry, screenwash
Sample size: 195 specimens
Years: 2002, 2004, 2005
Net or trap nights: 0
kg screened: 5000
Basal area status: not applicable
Sampling comments: "collected by dry and wet screening of more than 5 tons of matrix from the site (CD 0227, near bottom of layer 3)" in 2002, 2004, and 2005
"fishes, turtles, ostrich egg shells" are also present but not described
"fishes, turtles, ostrich egg shells" are also present but not described
Metadata
Sample no: 4490
Contributor no: John Alroy
Enterer: John Alroy
Created: 2024-11-17 02:49:18
Modified: 2024-11-17 02:49:18
Abundance distribution
Each square represents a species. Square sizes are proportional to counts. Values are logged.
Statistics
16 species
4 singletons
total count 195
geometric series index: 27.7
Fisher's α: 4.128
geometric series k: 0.7656
Hurlbert's PIE: 0.8259
Shannon's H: 2.0329
Good's u: 0.9796
Register
| Talpinae indet. | 1 | |
| Soricidae indet. | 3 | |
| Sinotamias sp. | 3 | |
| †Sciurotamias cf. pusillus | 3 | |
| Pliopetaurista sp. | 2 | |
| Eomyidae indet. | 2 | |
| †Lophocricetus cf. xianensis | 33 | |
| Protalactaga sp. | 1 | |
| Stylodipus sp. | 1 | |
| ? | ||
| †Myocricetodon lantianensis | 18 | |
| †Nannocricetus primitivus | 16 | |
| Sinocricetus sp. | 13 | |
| †Huerzelerimys exiguus | 41 | |
| new | ||
| Pararhizomys sp. | 1 | |
| †Ochotona primitiva | 55 | |
| Ochotona sp. | 2 | |
| small | ||