Rhynchonellata - Orthida - Productorthidae

Full reference: R. B. Neuman. 1964. Fossils in the Ordovician Tuffs Northeastern Maine. United States Geological Survey Bulletin 1181(E):1-38

Belongs to Productorthis according to R. B. Neuman 1964

Sister taxon: Productorthis angulensis

Ecology: stationary epifaunal suspension feeder