Yaquina Formation

|E. barnesi

|South of Beaver Creek, Lincoln County, Oregon.{{Cite journal |last=Berta |first=Annalisa |date=1991 |title=New Enaliarctos* (Pinnipedimorpha) from the Oligocene and Miocene of Oregon and the Role of "Enaliarctids" in Pinniped Phylogeny |url=https://repository.si.edu/handle/10088/19145 |journal=Smithsonian Contributions to Paleobiology |language=en |issue=69 |pages=1–33 |doi=10.5479/si.00810266.69.1|hdl=10088/19145 }}

|USNM 314295 (anterior half of cranium and associated mandibular rami).

|A pinnipedimorph.

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|Ona Beach, Lincoln County, Oregon.{{Cite journal |last1=Poust |first1=Ashley W. |last2=Boessenecker |first2=Robert W. |date=2018 |title=Expanding the geographic and geochronologic range of early pinnipeds: New specimens of Enaliarctos from Northern California and Oregon |url=https://www.app.pan.pl/article/item/app003992017.html |journal=Acta Palaeontologica Polonica |volume=63 |issue=1 |pages=25–40|doi=10.4202/app.00399.2017 |s2cid=55978096 |doi-access=free }}

|UCMP 253400 (associated right mandible, thoracic vertebra & 2 ribs).

|A pinnipedimorph.

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|A. cotylaveus

|Lincoln County, Oregon.{{Cite journal |last=Emlong |first=Douglas |date=October 1966 |title=A NEW ARCHAIC CETACEAN FROM THE OLIGOCENE OF NORTHWEST OREGON |url=https://scholarsbank.uoregon.edu/xmlui/handle/1794/19998 |journal=Bulletin of the Museum of Natural History, University of Oregon |language=en-US |issue=3 |pages=1–51}}

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|An aetiocetid whale.

|File:Aetiocetus BW.jpg

|Ona Beach, Lincoln County, Oregon.{{Cite journal |last1=DEMÉRÉ |first1=THOMAS A. |last2=BERTA |first2=ANNALISA |date=2008 |title=Skull anatomy of the Oligocene toothed mysticete Aetioceus weltoni (Mammalia; Cetacea): implications for mysticete evolution and functional anatomy |url=http://dx.doi.org/10.1111/j.1096-3642.2008.00414.x |journal=Zoological Journal of the Linnean Society |volume=154 |issue=2 |pages=308–352 |doi=10.1111/j.1096-3642.2008.00414.x |s2cid=20615374 |issn=0024-4082}}

|UCMP 122900.

|An aetiocetid whale.

|File:Aetiocetus skull cast.jpg

|B. emlongi

|Seal Rock State Wayside, Lincoln County, Oregon.{{Cite book |last1=Domning |first1=Daryl P. |url=https://www.biodiversitylibrary.org/bibliography/159042 |title=Two new Oligocene desmostylians and a discussion of tethytherian systematics |last2=Mckenna |first2=Malcolm C. |last3=Ray |first3=Clayton Edward |date=1986 |publisher=Smithsonian Institution Press |location=City of Washington}}

|USNM 244033 & 186889.

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|C. sookensis

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|"2 skulls, 4 partial mandibles, 4 isolated teeth, an innominate & a tibia".{{Cite journal |last=Beatty |first=Brian Lee |date=2009-09-12 |title=New material of Cornwallius sookensis (Mammalia: Desmostylia) from the Yaquina Formation of Oregon |url=https://doi.org/10.1671/039.029.0320 |journal=Journal of Vertebrate Paleontology |volume=29 |issue=3 |pages=894–909 |doi=10.1671/039.029.0320 |bibcode=2009JVPal..29..894B |s2cid=83759776 |issn=0272-4634}}

|A desmostylid.

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|P. yaguinensis

|Southwest edge of Waldport.{{Cite journal |last=David |first=Lore Rose |date=1956 |title=Tertiary Anacanthin Fishes from California and the Pacific Northwest; Their Paleoecological Significance |url=https://www.jstor.org/stable/1300292 |journal=Journal of Paleontology |volume=30 |issue=3 |pages=568–607 |jstor=1300292 |issn=0022-3360}}

|A scale.

|A bathygadid also known from the Toledo Formation.

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|P. alseanus

|South side of Alsea Bay.

|A scale.

|A macrourid.

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|Southwest edge of Walport.

|Scales.

|A macrourid.

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|P. macrospinosus

|South side of Alsea Bay.

|A scale.

|A macrourid.

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|M. applegatei

| Upper member, Ona Beach State Park, Lincoln County, Oregon.{{Cite journal |last1=Shimada |first1=Kenshu |last2=Welton |first2=Bruce J. |last3=Long |first3=Douglas J. |date=March 2014 |title=A new fossil megamouth shark (Lamniformes, Megachasmidae) from the Oligocene-Miocene of the western United States |url=http://www.tandfonline.com/doi/abs/10.1080/02724634.2013.803975 |journal=Journal of Vertebrate Paleontology |language=en |volume=34 |issue=2 |pages=281–290 |doi=10.1080/02724634.2013.803975 |bibcode=2014JVPal..34..281S |s2cid=83949683 |issn=0272-4634}}

|2 teeth (LACM 122120 and 122121).

| A megamouth shark also known from the Jewett Sand, Skooner Gulch & Nye Mudstone formations.

|