The species is not valid, and probably results from a lapsus calami. Hartman (1967) states "Paraonis, abranchiate", to refer to several unidentified specimens which lacked branchiae, but she does not describe or name this form as new.
Hartman, Olga. (1967). Polychaetous annelids collected by the USNS Eltanin and Staten Island cruises, chiefly from Antarctic Seas. Allan Hancock Monographs in Marine Biology. 2: 1-387.