Plumularioidea

Aglaopheniidae is a family of hydrozoans.

Schizotricha is a genus of cnidarians belonging to the monotypic family Schizotrichidae.

Kirchenpaueriidae is a family of hydrozoans in the superfamily Plumularioidea. Their hydrocladia are characteristically set in an alternating fashion as one progresses along the stems, forming two neat rows except in Oswaldella laertesi, which has three such rows. The alternating placement of the hydrocladia can be used to distinguish them from the Plumulariidae which may look superficially similar.

Plumulariidae is a family of hydrozoans.

Halopterididae is a family of hydrozoans.