This is an Angolan rodent with a published record from a central Angolan field survey and a specialist study of its skull. Its relationships to close relatives remain uncertain.
A craniometric comparison describes the skull of Angolan O. anchietae as distinctly larger than those of other otomyines.
An Angolan mammal survey recorded the species at Cuito Source in the central part of the country.
An extinction-risk assessment has not been added yet.