Pacific City
Basic information
Sample name: Pacific City
Sample aka: LACM 7679
Reference: T. A. Wake and M. A. Roeder. 2009. A diverse Rancholabrean vertebrate microfauna from southern California includes the first fossil record of ensatina (Ensatina eschscholtzii: Plethodontidae). Quaternary Research 72:364-370 [ER 3200]
Geography
Country: United States
State: California
County: Los Angeles
Coordinate: 34° 41' N, 118° 0' W
Latlng basis: based on nearby landmark
Time interval: Late Pleistocene
Ma: 0.04098
Age basis: radiocarbon (uncalibrated)
Geography comments: "approximately 1 km south of the Huntington Beach Pier and1 km inland from the current shoreline" (coordinate based on Huntington Beach)
"A single freshwater mollusk shell recovered fromthe dark organic layer that produced the microfaunal remains discussed here (LACM 7679) has been AMS radiocarbon dated to 40, 980±800 14C yr BP"
"A single freshwater mollusk shell recovered fromthe dark organic layer that produced the microfaunal remains discussed here (LACM 7679) has been AMS radiocarbon dated to 40, 980±800 14C yr BP"
Environment
Lithology: claystone
Taphonomic context: fluvial deposit
Habitat comments: "These sediments are most likely associated with late Pleistocene channels of the Santa Ana River system... a thin, dark organic layer of fine-grained silts and clays within the broader light tan interbedded fluvial sand deposits"
Methods
Life forms: rodents, other small mammals, birds, lizards, snakes, turtles, frogs, salamanders, fishes
Sampling methods: quarry, screenwash
Sample size: 695 specimens
Net or trap nights: 0
kg screened: 1000
Basal area status: not applicable
Sampling comments: "A bulk sample of 1000 kg of fine-grained fossil-bearing sediments was collected in the field. These sediments were treated with a variety of defloculants and washed through 0.5-mm mesh"
Metadata
Sample no: 3510
Contributor no: John Alroy
Enterer: John Alroy
Created: 2019-09-10 14:55:55
Modified: 2023-09-11 10:41:08
Abundance distribution
Each square represents a species. Square sizes are proportional to counts. Values are logged.
Statistics
33 species
6 singletons
total count 695
geometric series index: 48.6
Fisher's α: 7.206
geometric series k: 0.8506
Hurlbert's PIE: 0.8592
Shannon's H: 2.463
Good's u: 0.9914
Register
| Gasterosteus aculeatus | 3 | |
| Gila cf. orcutti | 8 | |
| Cottus cf. asper | 1 | |
| Aneides lugubris | 153 | |
| Ensatina eschscholtzii | 7 | |
| Batrachoseps sp. | 21 | |
| Plethodontidae indet. | 11 | |
| Anaxyrus boreas | 1 | |
| "Bufo boreas" | ||
| Lithobates sp. | 1 | |
| "Rana sp." | ||
| Pseudacris regilla | 74 | |
| Anniella pulchra | 15 | |
| Elgaria cf. multicarinata | 63 | |
| Sceloporus sp. | 20 | |
| Uta stansburiana | 13 | |
| Diadophis punctatus | 38 | |
| Lampropeltis cf. getula | 1 | |
| Masticophis sp. | 4 | |
| Pituophis melanoleucus | 4 | |
| Rhinocheilus lecontei | 17 | |
| Thamnophis sp. | 8 | |
| Actinemys cf. marmorata | 177 | |
| Callipepla californica | 2 | 12.3 g |
| Rallus limicola | 5 | 84.1 g |
| Sorex cf. ornatus | 9 | |
| Scapanus latimanus | 1 | |
| Sylvilagus cf. bachmani | 1 | |
| Marmotini indet. | 2 | |
| "Tamias sp." tentatively referred | ||
| Thomomys bottae | 2 | 128.0 g |
| Dipodomys cf. agilis | 2 | |
| Peromyscus cf. maniculatus | 7 | 19.1 g |
| Reithrodontomys megalotis | 4 | 10.3 g |
| Neotoma sp. | 12 | |
| Microtus californicus | 8 | |