Oregoniplana opisthopora is a species of planarian in the family Cercyridae.Tyler, S., Artois, T.; Schilling, S.; Hooge, M.; Bush, L.F. (eds) (2006-2023). World List of turbellarian worms: Acoelomorpha, Catenulida, Rhabditophora. Oregoniplana opisthopora Holmquist & Karling, 1972. Accessed 2023-06-17. Its type locality is Oregon.
Description Oregoniplana opisthopora is approximately in length and has a brownish-grey coloration. It lacks auricles, but possesses two eyes. Spots indicate the locations of its gonads, pharynx and copulatory bulb. Unicellular papillae are present along its body margin.Holmquist C. & Karling T.G. (1972) Two new species of interstitial marine triclads from the North American Pacific coast, with comments on evolutionary trends and systematics in Tricladida (Turbellaria). Zoologica Scripta 1: 175-184.
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