''Somniosus gonzalezi'' is an extinct species of

sleeper A sleeper is a person who is sleeping. Sleeper may also refer to: Arts and entertainment Characters * Sleeper (Marvel Comics), a Nazi German robot utilized by the Red Skull in Marvel Comics * The Sleeper (Wild Cards), a character in the Wild Ca ...

shark Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimo ...

that lived during the

Oligocene epoch The Oligocene ( ) is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that define the epoch are well identified but th ...

Rupelian to Chattian stages. The species was described from teeth

fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...

s found in the

Pysht Formation The Pysht Formation is a geologic formation in Washington (state). It preserves fossils dating back to the Paleogene period. Fossil content Crustaceans See also * List of fossiliferous stratigraphic units in Washington (state) * Paleontology ...

of Washington states

Olympic Peninsula The Olympic Peninsula is a large arm of land in western Washington that lies across Puget Sound from Seattle, and contains Olympic National Park. It is bounded on the west by the Pacific Ocean, the north by the Strait of Juan de Fuca, and the ...

References

Fossil taxa described in 2016 Somniosus gonzalezi Prehistoric sharks Fossils of the United States Fish described in 2016 {{Shark-stub