Fabriciinae (corrected spelling, original spelling Fabricinae) is now regarded as a separate family. See
Fabriciidae. Thus the nominal subfamily Sabellinae within Sabellidae is currently strictly unneeded. However, Capa et al (2011) in a related study, while broadly supportive of the separation of Fabriciinae and its likely sister relationship to Serpulidae, suggest the classification of Sabellida is not yet finalised.