Work found, with species-group names introduced therein:
Leal, J. H. and L. R. L. Simone. 2000.Copulabyssia riosi, a new deep-sea limpet (Gastropoda: Pseudococculinidae) from the continental slope off Brazil with comments on the systematics of the genus. Nautilus 114 59-68. Copulabyssia riosi