Sertularella Gray, 1847

Diagnosis. (Bouillon et al., 2006). Colony erect, branched or unbranched, monosiphonic or polysiphonic, hydrocaulus and hydrocladia when present, with two longitudinal rows of hydrothecae, hydrothecal margin with four cusps, submarginal teeth present or absent, operculum pyramidal, composed of four triangular valves, retracted hydranth with abcauline caecum, gonophores as solitary fixed sporosacs, acrocysts in some species.