Subgenera
This genus has two subgenera: *'' Protula (Hydroides)'' *'' Protula (Protulopsis)''Species
The following species are classified in this genus: *'' Protula alba'' Benedict, 1887 *'' Protula alberti'' Fauvel, 1909 *'' Protula americana'' McIntosh, 1885 *'' Protula anomala'' Day, 1955 *'' Protula antennata'' Ehlers, 1887 *'' Protula apomatoides'' (Uchida, 1978) *'' Protula atypha'' Bush, 1905 *'' Protula balboensis'' Monro, 1933 *''Synonyms
The following genera are synonyms of ''Protula'': *''Ehlerprotula'' Uchida, 1978 (junior synonym) *''Lemintina'' Risso, 1826 (subjective synonym) *''Longitubus'' Howell, 1943 † (subjective synonym) *''Membranopsis'' Bush, 1910 (subjective synonym) *''Paraprotula'' Uchida, 1978 (junior synonym) *''Peotula'' Sun, 1998 *''Protula (Philippiprotula)'' Uchida, 1978 (subgenus not recognized any longer) *''Protula (Protula)'' Risso, 1826 (subgenus not longer recognised) *''Protula (Psygmobranchus)'' Philippi, 1844 (subgenus not recognised any longer) *''Protulopsis'' Saint-Joseph, 1894 (synonym) *''Psygmobranchus'' Philippi, 1844 (junior synonym) *''Salmacinopsis'' Bush, 1910 *''Serpula (Helena)'' Castelnau *''Serpula (Spiramella)'' *''Spiramella'' Blainville, 1828 (junior synonym)References
{{Taxonbar, from=Q3901218 Serpulidae