M. oregonensis
# M. oregonensis

M. oregonensis may refer to:

* Marmara oregonensis, a moth species
* Metagonimoides oregonensis, a trematode species found in North America
* Methanolobus oregonensis, an Archaea species in the genus Methanolobus
* Moropus oregonensis, an extinct mammal species in the genus Moropus
