Yaquina Formation

The Yaquina Formation is a geologic formation in Oregon. It preserves fossils dating back to the Paleogene period.

Yaquina Formation
Stratigraphic range: Chattian
TypeGeological formation
Location
RegionLincoln County, Oregon
Country United States
Type section
Named forYaquina Head

Fossil content

Carnivorans
Carnivorans reported from the Yaquina Formation
GenusSpeciesPresence MaterialNotesImages
Enaliarctos E. barnesi South of Beaver Creek, Lincoln County, Oregon.[1] USNM 314295 (anterior half of cranium and associated mandibular rami).[1] A pinnipedimorph.
E. sp., cf. E tedfordi Ona Beach, Lincoln County, Oregon.[2] UCMP 253400 (associated right mandible, thoracic vertebra & 2 ribs).[2] A pinnipedimorph.

Cetaceans
Cetaceans reported from the Yaquina Formation
GenusSpeciesPresence MaterialNotesImages
Aetiocetus A. cotylaveus Lincoln County, Oregon.[3] An aetiocetid whale.
A. weltoni Ona Beach, Lincoln County, Oregon.[4] UCMP 122900.[4] An aetiocetid whale.

Desmostylians
Desmostylians reported from the Yaquina Formation
GenusSpeciesPresence MaterialNotesImages
Behemotops B. emlongi Seal Rock State Wayside, Lincoln County, Oregon.[5] USNM 244033 & 186889.[5]
Cornwallius C. sookensis "2 skulls, 4 partial mandibles, 4 isolated teeth, an innominate & a tibia".[6] A desmostylid.

Bony fish
Bony fish reported from the Yaquina Formation
GenusSpeciesPresence MaterialNotesImages
Paleobathygadus P. yaguinensis Southwest edge of Waldport.[7] A scale.[7] A bathygadid also known from the Toledo Formation.
Promacrurus P. alseanus South side of Alsea Bay.[7] A scale.[7] A macrourid.
P. oregonensis Southwest edge of Walport.[7] Scales.[7] A macrourid.
Pyknolepidus P. macrospinosus South side of Alsea Bay.[7] A scale.[7] A macrourid.

Sharks
Sharks reported from the Yaquina Formation
GenusSpeciesPresence MaterialNotesImages
Megachasma M. applegatei Upper member, Ona Beach State Park, Lincoln County, Oregon.[8] 2 teeth (LACM 122120 and 122121).[8] A megamouth shark also known from the Jewett Sand, Skooner Gulch & Nye Mudstone formations.

See also

References
  1. Berta, Annalisa (1991). "New Enaliarctos* (Pinnipedimorpha) from the Oligocene and Miocene of Oregon and the Role of "Enaliarctids" in Pinniped Phylogeny". Smithsonian Contributions to Paleobiology (69): 1–33. doi:10.5479/si.00810266.69.1. hdl:10088/19145.
  2. Poust, Ashley W.; Boessenecker, Robert W. (2018). "Expanding the geographic and geochronologic range of early pinnipeds: New specimens of Enaliarctos from Northern California and Oregon". Acta Palaeontologica Polonica. 63 (1): 25–40. doi:10.4202/app.00399.2017. S2CID 55978096.
  3. Emlong, Douglas (October 1966). "A NEW ARCHAIC CETACEAN FROM THE OLIGOCENE OF NORTHWEST OREGON". Bulletin of the Museum of Natural History, University of Oregon (3): 1–51.
  4. DEMÉRÉ, THOMAS A.; BERTA, ANNALISA (2008). "Skull anatomy of the Oligocene toothed mysticete Aetioceus weltoni (Mammalia; Cetacea): implications for mysticete evolution and functional anatomy". Zoological Journal of the Linnean Society. 154 (2): 308–352. doi:10.1111/j.1096-3642.2008.00414.x. ISSN 0024-4082. S2CID 20615374.
  5. Domning, Daryl P.; Mckenna, Malcolm C.; Ray, Clayton Edward (1986). Two new Oligocene desmostylians and a discussion of tethytherian systematics. City of Washington: Smithsonian Institution Press.
  6. Beatty, Brian Lee (2009-09-12). "New material of Cornwallius sookensis (Mammalia: Desmostylia) from the Yaquina Formation of Oregon". Journal of Vertebrate Paleontology. 29 (3): 894–909. Bibcode:2009JVPal..29..894B. doi:10.1671/039.029.0320. ISSN 0272-4634. S2CID 83759776.
  7. David, Lore Rose (1956). "Tertiary Anacanthin Fishes from California and the Pacific Northwest; Their Paleoecological Significance". Journal of Paleontology. 30 (3): 568–607. ISSN 0022-3360. JSTOR 1300292.
  8. Shimada, Kenshu; Welton, Bruce J.; Long, Douglas J. (March 2014). "A new fossil megamouth shark (Lamniformes, Megachasmidae) from the Oligocene-Miocene of the western United States". Journal of Vertebrate Paleontology. 34 (2): 281–290. Bibcode:2014JVPal..34..281S. doi:10.1080/02724634.2013.803975. ISSN 0272-4634. S2CID 83949683.

Sources


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