La Paz bonebed
Basic information
Sample name: La Paz bonebed
Reference: A. Corona, D. Perea, P. Toriño, and C. Goso. 2012. Taphonomy, sedimentology and chronology of a fossiliferous outcrop from the continental Pleistocene of Uruguay. Revista Mexicana de Ciencias Geológicas 29(2):514-525 [ER 3789]
Geography
Country: Uruguay
Coordinate: 34° 44' S, 56° 17' W
Coordinate basis: stated in text
Time interval: Late Pleistocene
Geography comments: the formation is thought to be "late middle Pleistocene-early Holocene" based on biochronology but the authors appear to favor a Pleistocene and presumably Late Pleistocene age assignment for the fauna itself
there are two radiocarbon dates, one on Stegomastodon (17620 +/- 100 yr BP) and the other on Toxodon (5917 +/- 65 yr BP): the authors dismiss both because of "the absence of collagen" in almost all analysed specimens, but at least the first is consistent with a Late Pleistocene age assignment
there are two radiocarbon dates, one on Stegomastodon (17620 +/- 100 yr BP) and the other on Toxodon (5917 +/- 65 yr BP): the authors dismiss both because of "the absence of collagen" in almost all analysed specimens, but at least the first is consistent with a Late Pleistocene age assignment
Environment
Lithology: conglomerate
Habitat comments: "a preserved bonebed in a diamictite facies... located in a quarry" that "formed as a result of transport and deposition... during a high-energy event, like a mudflow"
Methods
Life forms: ungulates,other large mammals,birds
Sampling methods: quarry
Sample size: 91 specimens
Sampling comments: all available specimens were apparently listed, but a faunal list in the paper also mentions Ozotoceros cf. bezoarcticus, Hemiauchenia sp., and Ciconia sp.; these may be inventoried in Table 1 under broader names
Metadata
Sample number: 4119
Contributor: John Alroy
Enterer: John Alroy
Created: 2023-02-24 16:41:01
Modified: 2023-02-24 05:48:47
Abundance distribution
16 species
6 singletons
total count 91
geometric series index: 34.5
Fisher's α: 5.627
geometric series k: 0.8163
Hurlbert's PIE: 0.8514
Shannon's H: 2.2017
Good's u: 0.9350
Each square represents a species. Square sizes are proportional to counts.
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Register
| Lestodon sp. | 20 | |
| Megatheriinae indet. | 1 | |
| Glyptodon sp. | 21 | |
| Panochthus sp. | 7 | |
| Doedicurus sp. | 1 | |
| Neosclerocalyptus sp. | 2 | |
| Propraopus sp. | 1 | |
| Toxodon sp. | 6 | |
| Cervidae indet. | 13 | |
| possibly Ozotoceros | ||
| Camelidae indet. | 10 | |
| possibly Hemiauchenia | ||
| †Notiomastodon platensis | 2 | |
| "Stegomastodon waringi" | ||
| Hippidion sp. | 1 | |
| Equus sp. | 2 | |
| Macraucheniidae indet. | 2 | |
| "Macrauchenidae indet." | ||
| Aves indet. | 1 | |
| possibly Ciconia | ||
| Phorusracidae indet. | 1 | |