Aktau I
Basic information
Sample name: Aktau I
Reference: E. G. Kordikova and H. de Bruijn. 2001. Early Miocene Rodents from the Aktau Mountains (South-Eastern Kazakhstan). Senckenbergiana lethaea 81(2):391-405 [ER 2391]
Geography
Country: Kazakhstan
Coordinate: 43° 59' N, 79° 13' E
Coordinate basis: stated in text
Formation: Chul'adyr
Time interval: Middle Miocene
Zone: MN4
Ma: 17
Geography comments: "in the Middle Member" of the formation, "about five metres above the horizon that has yielded a diverse assemblage of larger mammals"
the rodents "possibly represent the MN4" (i.e., roughly 17 Ma)
the rodents "possibly represent the MN4" (i.e., roughly 17 Ma)
Environment
Substrate: ground surface
Lithology: claystone
Habitat comments: "a lens of blue-green clay"
Methods
Life forms: rodents
Sampling methods: screenwash
Sample size: 160 specimens
Sampling comments: "The isolated rodent cheek teeth... were collected by wet screening in bags of plastic mesh. The fragment of lower jaw of a beaver (pi. 3 figs 7a and 7b) is a surface find from the same level, but at some distance from the main locality - in Aktau III" (all the rest of the material is from Aktau I)
additional taxa are not discussed
additional taxa are not discussed
Metadata
Sample number: 2585
Contributor: John Alroy
Enterer: John Alroy
Created: 2017-02-17 21:09:07
Modified: 2017-02-17 10:09:07
Abundance distribution
5 species
0 singletons
total count 160
geometric series index: 6.4
Fisher's α: 0.980
geometric series k: 0.3724
Hurlbert's PIE: 0.4902
Shannon's H: 0.8760
Good's u: 1.0000
Each square represents a species. Square sizes are proportional to counts.
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Register
| Aktaumys dzhungaricus | 104 | |
| new | ||
| Karydomys dzerzhinskii | 46 | |
| new | ||
| Tachyoryctoidinae indet. | 3 | |
| Sinosminthus sp. | 2 | |
| questionably referred | ||
| Sayimys aff. obliquidens | 5 | |