Conopomatus Pillai, 1960 accepted as Spirobranchus Blainville, 1818 (source of synonymy)
Cymospira bicornis (Abildgaard, 1789) accepted as Spirobranchus giganteus (Pallas, 1766) (additional source)
Cymospira brachycera Baird, 1864 accepted as Spirobranchus corniculatus (Grube, 1862) (source of synonymy)
Cymospira cervina Quatrefages, 1866 accepted as Spirobranchus giganteus (Pallas, 1766) (additional source)
Cymospira crescentigera Quatrefages, 1866 accepted as Spirobranchus corniculatus (Grube, 1862) (additional source)
Cymospira incrassata Kroeyer in Mörch in Quatrefages, 1866 accepted as Spirobranchus incrassatus Krøyer in Mörch, 1863 (source of synonymy)
Cymospira litigera Quatrefages, 1866 accepted as Spirobranchus dendropoma Mörch, 1863 (additional source)
Cymospira macgillivrayi Baird, 1864 accepted as Spirobranchus corniculatus (Grube, 1862) (additional source)
Cymospira megasoma Quatrefages, 1866 accepted as Spirobranchus giganteus (Pallas, 1766) (additional source)
Cymospira morchii Quatrefages, 1866 accepted as Spirobranchus cruciger (Grube, 1862) accepted as Spirobranchus corniculatus (Grube, 1862) (additional source)
Cymospira polycera Schmarda, 1861 accepted as Spirobranchus polycerus (Schmarda, 1861) (additional source)
Cymospira quoyi Quatrefages, 1866 accepted as Spirobranchus corniculatus (Grube, 1862) (source of synonymy)
Cymospira tricornis Baird, 1864 accepted as Spirobranchus cruciger (Grube, 1862) accepted as Spirobranchus corniculatus (Grube, 1862) (additional source)
Olga elegantissima Jones, 1962 accepted as Spirobranchus giganteus (Pallas, 1766) (status source)
Penicillum marinum Seba, 1758 accepted as Spirobranchus giganteus (Pallas, 1766) (source of synonymy)
Pomatoceros bucephalus Mörch, 1863 accepted as Spirobranchus cruciger (Grube, 1862) accepted as Spirobranchus corniculatus (Grube, 1862) (source of synonymy)
Pomatoceros corniculata Grube, 1862 accepted as Spirobranchus corniculatus (Grube, 1862) (source of synonymy)
Pomatoceros davaoensis Treadwell, 1942 accepted as Spirobranchus corniculatus (Grube, 1862) (source of synonymy)
Pomatoceros elaphus Haswell, 1885 accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Pomatoceros luzonica (Grube, 1881) accepted as Spirobranchus corniculatus (Grube, 1862) (source of synonymy)
Pomatoceros multicornis Grube, 1862 accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Pomatoceros tetraceros Schmarda, 1861 accepted as Spirobranchus tetraceros (Schmarda, 1861) (redescription)
Pomatoceros tricornigera (Grube, 1878) accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Pomatoceros tricornis (Grube, 1881) accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Serpula (Pomatoceros) corniculata Grube, 1862 accepted as Spirobranchus corniculatus (Grube, 1862) (source of synonymy)
Serpula (Pomatoceros) luzonica Grube, 1881 accepted as Spirobranchus corniculatus (Grube, 1862) (source of synonymy)
Serpula (Pomatoceros) multicornis Grube, 1862 accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Serpula (Pomatoceros) tricornis Grube, 1881 accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Serpula tricornigera Grube, 1878 accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Spirobranchus cervicornis Willey, 1905 accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Spirobranchus crescentigera (Quatrefages, 1866) accepted as Spirobranchus corniculatus (Grube, 1862) (source of synonymy)
Spirobranchus dendropoma Mörch, 1863 (source of synonymy)
Spirobranchus giganteus (Pallas, 1766) (redescription)
Spirobranchus giganteus arabica Monro, 1937 accepted as Spirobranchus arabicus Monro, 1937 (source of synonymy)
Spirobranchus giganteus corniculatus (Grube, 1862) accepted as Spirobranchus corniculatus (Grube, 1862) (basis of record)
Spirobranchus giganteus coutierei (Gravier, 1905) accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Spirobranchus giganteus giganteus (Pallas, 1766) accepted as Spirobranchus giganteus (Pallas, 1766) (basis of record)
Spirobranchus giganteus microceras Mörch, 1863 accepted as Spirobranchus giganteus (Pallas, 1766) (additional source)
Spirobranchus giganteus tricornis Mörch, 1863 accepted as Spirobranchus giganteus (Pallas, 1766) (source of synonymy)
Spirobranchus giganteus turbinatus Pixell, 1913 accepted as Spirobranchus corniculatus (Grube, 1862) (source of synonymy)
Spirobranchus incrassatus Krøyer in Mörch, 1863 (additional source)
Spirobranchus jousseaumei (Gravier, 1906) accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Spirobranchus kroyeri Augener, 1925 accepted as Spirobranchus incrassatus Krøyer in Mörch, 1863 (source of synonymy)
Spirobranchus latiscapus (Marenzeller, 1884) (additional source)
Spirobranchus maldivensis Pixell, 1913 (additional source)
Spirobranchus multicornis (Grube, 1862) accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Spirobranchus polycerus (Schmarda, 1861) (redescription)
Spirobranchus polycerus augeneri ten Hove, 1970 (original description)
Spirobranchus pseudoincrassatus Bush, 1905 accepted as Spirobranchus incrassatus Krøyer in Mörch, 1863 (additional source)
Spirobranchus semperi Mörch, 1863 accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Spirobranchus semperi aceros Pixell, 1913 accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Spirobranchus semperi acroceros Willey, 1905 accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Spirobranchus semperi papillosus Wesenberg-Lund, 1949 accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Spirobranchus spinosus Moore, 1923 (source of synonymy)
Spirobranchus tetraceros (Schmarda, 1861) (redescription)
Spirobranchus tricornigerus (Grube, 1878) accepted as Spirobranchus tetraceros (Schmarda, 1861) (source of synonymy)
Spirobranchus tricornis Mörch, 1863 accepted as Spirobranchus giganteus (Pallas, 1766) (source of synonymy)

 Editor's comment

 for Spirobranchus gardineri Pixell, 1913

based on the examination of material from the Gulf of Eilath, erroneously identified as S. gardineri by Fauvel ... [details]

 Holotype

 for Spirobranchus semperi papillosus Wesenberg-Lund, 1949

Zool. Mus. Copenhagen [details]

 Nomenclature

 for Cymospira litigera Quatrefages, 1866

just a new name based on Mörch's diagnosis for Spirobranchus dendropoma Mörch, 1863 [details]

 Status

 for Spirobranchus semperi Mörch, 1863

Synonymized by e.g. ten Hove (1970) with Spirobranchus tetraceros, the taxon has been reinstated by Pillai (2009: ... [details]