Sagartia coccinea Gosse, 1860 – synonym of Sagartiogeton laceratus
Sagartia ichtyostoma Gosse, 1860 – synonym of Sagartia elegans
Sagartia lineata Verrill, 1869 – synonym of Haliplanella lineata
Sagartia luciae Verrill, 1898 – synonym of Haliplanella lineata
Sagartia minata Gosse, 1860 – synonym of Sagartia elegans
Sagartia nivea Gosse, 1860 – synonym of Sagartia elegans
Sagartia ornata Gosse, 1860 – synonym of Sagartia troglodytes
Sagartia parasitica Gosse, 1860 – synonym of Calliactis parasitica
Sagartia rhododactylus Pax & Muller, 1962 – synonym of Sagartia elegans
Sagartia rosea Gosse, 1860 – synonym of Sagartia elegans
Sagartia sphyrodeta Gosse, 1858 – synonym of Actinothoe sphyrodeta
Sagartia venusta Gosse, 1860 – synonym of Sagartia elegans
Sagartia viduata Gosse, 1860 – synonym of Sagartiogeton undatus
Sarcodictyon catenata Forbes, in Johnston, 1847 – synonym of Sarcodictyon roseum
Sphenotrochus andrewianus Milne-Edwards & Haime, 1848 – synonym of Sphenotrochus andrewianus
Sphenotrochus macandrewanus Milne-Edwards & Haime, 1857 – synonym of Sphenotrochus andrewianus
Sphenotrochus wrightii Gosse, 1859 – synonym of Sphenotrochus andrewianus
Stomphia churchiae Gosse, 1859 – synonym of Stomphia coccinea
Swiftia rosea ssp. pallida Madsen, 1970 – synonym of Swiftia pallida
Synarachnactis bournei Leloup, 1963 – synonym of Cerianthus lloydii