Genus Plotohelmis Chamberlin, 1919

Type species: Plotohelmis alata Chamberlin, 1919

Diagnosis. Body small, slender and elongate. Prostomium projecting in front of eyes. Proboscis with marginal papillae but without lateral horns. First three segments bear tentacular cirri according to formula 1+ 1/1+1/N or 1+ 1/1+1/1. Segment 4 and all subsequent segments fully developed with foliaceous dorsal and ventral cirri and chaetigerous lobe without cirriform appendage but with projecting aciculum. Chaetae mainly compound spinigers plus few simple acicular chaetae which are more numerous in anterior segments.