Distribution: Cincuntropical, in the western Atlantic only known from Florida; this is the first record from the Caribbean coast of Panama. Characteristics: Body very elongate and narrow, up to 40 mm long. Rhinophoral sheaths elevated, with a series of papillae on upper edge. Numerous cerata arranged on a single row on body sides. Oral tentacles elongate. Color dark brown with numerous opaque white flecks on broken lines all over body. Cerata translucent, almost transparent, with opaque white spots.