Elkobatrachus type locality (Eocene of the United States)

Also known as CM locality 3692

Where: Elko County, Nevada (40.8° N, 115.7° W: paleocoordinates 44.1° N, 104.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Elko Formation, Early/Lower Uintan (46.2 - 39.7 Ma)

• "tentatively assigned to the Uintan Land Mammal Age" based on a zircon U-Pb date of 46.1 +/- 0.1 Ma for a tuff in the underlying lower member; a much younger U-Pb date of 38.9 +/- 0.3 Ma applies to the "topmost part" of the much higher upper member and is therefore not very relevant

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine deltaic; lithified, sandy limestone

• "a lacustrine, carbonate flat environment of relatively shallow depth, most likely less than 10 m" proximal to "a clastic point source along the lake margin" and within "a broad, low-lying area"
• "thin, decimeter-scale beds of sandy limestone near the base" of the informal middle member

Size classes: macrofossils, mesofossils

Preservation: adpression

Collected by S. R. Haynes; reposited in the CM

Primary reference: A. C. Henrici and S. R. Haynes. 2006. Elkobatrachus brocki, a new pelobatid (Amphibia: Anura) from the Eocene Elko Formation of Nevada. Annals of Carnegie Museum 75(1):11-35 [W. Dahdul/A. Dececchi]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 135745: authorized by John Alroy, entered by John Alroy on 06.11.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
? Pontoniella sp.
Gastropoda
 Heterostropha - Lymnaeidae
Lymnaea sp.
Lymnaea sp. Lamarck 1799 snail
Bivalvia
 Cardiida - Sphaeriidae
Sphaerium sp.
Sphaerium sp. Scopoli 1777 fingernail clam
Ostracoda
 Podocopida - Candonidae
Candona sp.
Candona sp. Baird 1845 ostracod
Amphibia
 Salientia - Pelobatidae
Elkobatrachus brocki n. gen. n. sp.
Elkobatrachus brocki n. gen. n. sp. Henrici and Haynes 2006 spadefoot toad