2 literature references for Oriopsis tristanensis (Day, 1954):

Author: Fauchald, Kristian
Year: 2007
Title: World Register of Polychaeta
Author: Hartman, O.
Year: 1959
Title: Catalogue of the Polychaetous Annelids of the World. Occasional Papers of the Allan Hancock Foundation, 23: 628pp.