''Novumbra oregonensis'' is an extinct species of mudminnow from Oregon, USA. All fossils have been found in the lower member of the

John Day Formation The John Day Formation is a series of rock strata exposed in the Picture Gorge district of the John Day River basin and elsewhere in north-central Oregon in the United States. The Picture Gorge exposure lies east of the Blue Mountain uplift, whi ...

; the type specimens were found in the Knox Ranch leaf locality, and additional paratypes were found in the Bridge Creek flora locality. Similar to other mudminnows, its habitat would have been heavily vegetated waters, based on the presence of leaf imprints accompanying the fossils. ''Novumbra oregonensis'' differs from the only other member of the genus, the

Olympic mudminnow The Olympic mudminnow (''Novumbra hubbsi'') is a fish native to the western lowlands of Washington: the Chehalis River basin, Deschutes River basin, and some Olympic Peninsula basins. It grows to 8 cm (about 3 in) in length, and is Was ...

, by a larger head (the skull of the former goes into the standard length 3 times, while the latter's head goes into the standard length 3.5 times), and a significantly longer lower jaw. The pelvic, anal, and presumably dorsal fins are positioned more posteriorly on the body, and the standard length was slightly larger at 90 mm.

References

{{Taxonbar, from=Q106362705 Umbridae Prehistoric ray-finned fish John Day Fossil Beds National Monument