Also known as UCMP V79013, LACM 4290, UCMP V79036

Where: Lincoln County, Oregon (44.5° N, 124.1° W: paleocoordinates 44.2° N, 115.1° W)

• coordinate based on unpublished field data

When: Yaquina Formation, Chattian (28.1 - 23.0 Ma)

• near the top of the Yaquina Formation, very close to the contact with the overlying Nye Formation

•

•UCMP 122900 was found on the same beach as the holotype of A. cotylalveus, and may either have originated from the same stratigraphic horizon (about 28 Ma), or from a slightly younger layer [22, 24]. Although originally thought to date from the latest Oligocene, the uppermost part of the Yaquina formation has now been re-dated to the earliest Chattian (28.1–28.0 Ma [25]; see discussion of A. cotylalveus). (Marx & Fordyce, 2015)

• formation-level stratigraphic resolution

Environment/lithology: deltaic; lithology not reported

Size class: macrofossils

Preservation: original phosphate

Reposited in the UCMP

Collection methods: surface (in situ),

Primary reference: L. G. Barnes, M. Kimura, H. Furusawa and H. Sawamura. 1995. Classification and distribution of Oligocene Aetiocetidae (Mammalia; Cetacea; Mysticeti) from western North America and Japan. The Island Arc 3(4):392-431 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45788: authorized by Mark Uhen, entered by Mark Uhen on 01.12.2004, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)