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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

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Mammals

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Carnivorans

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Carnivorans reported from the Yaquina Formation
Genus Species Presence Material Notes Images
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

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Cetaceans reported from the Yaquina Formation
Genus Species Presence Material Notes Images
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

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Desmostylians reported from the Yaquina Formation
Genus Species Presence Material Notes Images
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.

Fish

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Bony fish

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Bony fish reported from the Yaquina Formation
Genus Species Presence Material Notes Images
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

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Sharks reported from the Yaquina Formation
Genus Species Presence Material Notes Images
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

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References

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  1. ^ a b 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. ^ a b 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. ^ a b 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. ^ a b 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. ^ a b c d e f g h 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. ^ a b 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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