Pratt slide
Basic information
Sample name: Pratt slide
Reference: D. Parmley and K. B. Hunter. 2010. Fossil Snakes of the Clarendonian (Late Miocene) Pratt Slide Local Fauna of Nebraska, with the Description of a New Natricine Colubrid. Journal of Herpetology 44(4):526-543 [ER 4263]
Geography
Country: United States
State: Nebraska
County: Brown
Coordinate: 42.6299° N, -100.0594° W
Coordinate basis: stated in text
Time interval: Late Miocene
Max Ma: 10.5
Min Ma: 9.5
Geography comments: "located 6.5 km north of Johnstown, Brown County, north-central Nebraska; NE1/4, SW1/4 section 30. T. 3/N, R.23W"
"The age of the Pratt Slide l.f. previously has been established to be late Miocene (late Clarendonian; Voorhies, 1990; Rudnick, 1994; Korth, 1998) at approximately 10.5–9.5 Ma"
"The age of the Pratt Slide l.f. previously has been established to be late Miocene (late Clarendonian; Voorhies, 1990; Rudnick, 1994; Korth, 1998) at approximately 10.5–9.5 Ma"
Environment
Lithology: siliciclastic (mixed)
Taphonomic context: fluvial deposit
Habitat comments: "a stream channel deposit located 6.5 km north of Johnstown, Brown County, north-central Nebraska; NE1/4, SW1/4 section 30. T. 3/N, R.23W"
Methods
Life forms: snakes
Sample size: 412 specimens
Sampled by: Rudnick
Years: 1994
Museum: University of Nebraska State Museum (UNSM)
Metadata
Sample number: 4657
Contributor: John Alroy
Enterer: Nicholas Vine
Created: 2025-02-06 03:14:59
Modified: 2025-02-06 03:14:59
Abundance distribution
25 species
6 singletons
total count 412
geometric series index: 48.3
Fisher's α: 5.859
geometric series k: 0.7853
Hurlbert's PIE: 0.3536
Shannon's H: 1.0633
Good's u: 0.9855
Each square represents a species. Square sizes are proportional to counts.
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Register
| †Tregophis brevirachis | 3 | |
| Calamagras sp. | 3 | |
| "Calamagras sp. indet. or Ogmophis sp. indet." | ||
| Erycinae indet. | 2 | |
| Coluber sp. | 2 | |
| "or Masticophis sp. indet." | ||
| †Paracoluber storeri | 2 | |
| Colubridae cf. Opheodrys sp. | 1 | |
| Lampropeltis aff. getula | 3 | |
| Lampropeltis triangulum | 3 | |
| †Elaphe cf. kansensis | 2 | |
| Elaphe sp. | 6 | |
| Pituophis sp. | 3 | |
| Ameiseophis robinsoni | 3 | |
| Texasophis sp. | 1 | |
| Paleoheterodon sp. | 15 | |
| "or Heterodon sp." | ||
| Natricinae cf. Tropidoclonion sp. | 1 | |
| Thamnophis sp. | 12 | |
| †Micronatrix juliescottae | 4 | |
| †Nerodia hillmani | 6 | |
| Nerodia sp. | 1 | |
| Natricinae cf. Neonatrix infera | 3 | |
| Colubridae indet. | 330 | |
| Viperidae cf. Agkistrodon sp. | 2 | |
| Viperidae cf. Crotalus sp. | 2 | |
| Sistrurus sp. | 1 | |
| Viperidae indet. | 1 | |