Synonymization of two, monotypic black-coral-commensal scale worm genera, Pettibone, 1991 and Pettibone, 1969 (Polynoidae, Aphroditiformia).

Pettibone, 1969 is a polynoid genus commensal with the antipatharian genus Opresko, 2001. These scale worms are elongate with numerous segments and small elytra. To date, the only other known polynoid associated with is Pettibone, 1991. By re-examining the holotype of , we have identified several overlooked characters that no longer distinguish this genus from . Based on the presence of chaetae on the tentacular segment and elytral irregularity on posterior segments, we propose synonymizing with .