• Siphonacmaea [sic] accepted as Siphonacmea Habe, 1958
• Siphonacmaea oblongata [sic] accepted as Siphonacmea oblongata (Yokoyama, 1926)
• Siphonacme Cook & Loomis, 1928
• Siphonacme aviceps (Loomis, 1961) accepted as Columbianum aviceps (Loomis, 1961)
• Siphonacme dawydoffi (Attems, 1938)
• Siphonacme globiceps (Pocock, 1903) accepted as Siphonophora globiceps Pocock, 1903
• Siphonacme lyttoni Cook & Loomis, 1928
• Siphonacme pseustes (Chamberlin, 1923)
• Siphonacme takashimai (Takakuwa, 1942)
• Siphonacme verrucosa (Attems, 1930) accepted as Balizonium verrucosum (Attems, 1930)
• Siphonacme villosa (Attems, 1938) accepted as Siphonophora villosa Attems, 1938
• Siphonacmea Habe, 1958
• Siphonacmea oblongata (Yokoyama, 1926)
• Siphonacmeidae Starobogatov, 1976 accepted as Siphonariidae J. E. Gray, 1827
• Siphonactinia Koren & Danielssen, 1856
• Siphonactinia (Peachia) (uncertain > unassessed)
• Siphonactinia (Peachia) boeckii (Dan. & Kor., 1856) accepted as Peachia boeckii (Danielssen & Koren, 1856) accepted as Peachia hastata Gosse, 1855
• Siphonactinia beckii accepted as Peachia boeckii (Danielssen & Koren, 1856) accepted as Peachia hastata Gosse, 1855
• Siphonactinia boecki Danielssen & Koren, 1856 accepted as Peachia boeckii (Danielssen & Koren, 1856) accepted as Peachia hastata Gosse, 1855
• Siphonactinia boeckii Danielssen & Koren, 1856 accepted as Peachia boeckii (Danielssen & Koren, 1856) accepted as Peachia hastata Gosse, 1855
• Siphonactinia hastata Gosse accepted as Peachia hastata Gosse, 1855
• Siphonactinia parasitica (Agassiz, 1861) accepted as Peachia parasitica (Agassiz, 1861)
• Siphonactinia tricapitata Andres, 1883 accepted as Peachia hastata Gosse, 1855
• Siphonactinia triphylla Gosse accepted as Peachia hastata Gosse, 1855
• Siphonactinia undata Gosse accepted as Peachia hastata Gosse, 1855
• Siphonactinopsis Carlgren, 1921
• Siphonactinopsis laevis Carlgren, 1921
• Siphonalia A. Adams, 1863
• Siphonalia (Coptochetus) Cossmann, 1889 † accepted as Coptochetus Cossmann, 1889 †
• Siphonalia (Kelletia) P. Fischer, 1884 accepted as Kelletia P. Fischer, 1884
• Siphonalia (Kelletia) kelletiiformis Vredenburg, 1924 † (uncertain > unassessed)
• Siphonalia (Lyrofusus) De Gregorio, 1880 † accepted as Lyrofusus De Gregorio, 1880 †
• Siphonalia (Lyrofusus) vasseuri Cossmann, 1889 † accepted as Pseudoneptunea vasseuri (Cossmann, 1889) †
• Siphonalia (Penion) P. Fischer, 1884 accepted as Penion P. Fischer, 1884
• Siphonalia (Penion) heptoides Cossmann, 1903 † represented as Siphonalia heptoides Cossmann, 1903 †
• Siphonalia (Phoracanthus) K. Martin, 1914 † accepted as Phoracanthus K. Martin, 1914 †
• Siphonalia (Phoracanthus) ickei K. Martin, 1914 † accepted as Phoracanthus ickei (K. Martin, 1914) †
• Siphonalia (Pseudoneptunea) Kobelt, 1882 accepted as Pseudoneptunea Kobelt, 1882
• Siphonalia (Pseudoneptunea) njalindungensis K. Martin, 1921 † accepted as Pseudoneptunea njalindungensis (K. Martin, 1921) †
• Siphonalia (Pseudoneptunea) praevia Oostingh, 1939 † accepted as Pseudoneptunea praevia (Oostingh, 1939) †
• Siphonalia (Pseudoneptunea) semiruta Berezovsky, 2018 † accepted as Pseudoneptunea semiruta Berezovsky, 2018 †
• Siphonalia (Pseudoneptunea) semisulcata K. Martin, 1933 † accepted as Enigmaticolus semisulcatus (K. Martin, 1933) †
• Siphonalia (Pseudoneptunea) vincenti Glibert, 1938 † (uncertain > unassessed)
• Siphonalia (Pseudoneptunea) wemmelensis Glibert, 1938 † (uncertain > unassessed)
• Siphonalia (Siphonalia) A. Adams, 1863 represented as Siphonalia A. Adams, 1863
• Siphonalia (Siphonalia) obliquicostata Glibert, 1938 † (uncertain > unassessed)
• Siphonalia acuminata A. Adams, 1863 accepted as Nassaria acutispirata (G. B. Sowerby III, 1913)
• Siphonalia arctata Staadt, 1913 †
• Siphonalia arenaria Cossmann, 1889 † accepted as Suessionia arenaria (Cossmann, 1889) †
• Siphonalia ariejansseni Schnetler, 2001 †
• Siphonalia aspersa Kuroda & T. Habe, 1961
• Siphonalia bantamensis K. Martin, 1895 †
• Siphonalia bervillei (Deshayes, 1864) †
• Siphonalia borshengjungi K.-Y. Lai, 2019
• Siphonalia callizona Kuroda & T. Habe, 1961
• Siphonalia callizona bicallizona T. Habe, 1961
• Siphonalia calvertana G. C. Martin, 1904 † (uncertain > unassessed)
• Siphonalia cassidariaeforme [sic] accepted as Siphonalia cassidariaeformis (Reeve, 1846)
• Siphonalia cassidariaeformis (Reeve, 1846)
• Siphonalia cassidariaeformis var. funerea Pilsbry, 1895 (uncertain > taxon inquirendum)
• Siphonalia chaussyensis Cossmann, 1889 † accepted as Siphonaliopsis chaussyensis (Cossmann, 1889) †
• Siphonalia cingulata (F. W. Hutton, 1885) † accepted as Cominella cingulata (F. W. Hutton, 1885) †
• Siphonalia clarkei Tenison Woods, 1876 accepted as Tasmeuthria clarkei (Tenison Woods, 1876)
• Siphonalia colus A. Adams, 1863 accepted as Siphonalia modificata (Reeve, 1846)
• Siphonalia commoda A. Adams, 1863 (uncertain > taxon inquirendum)
• Siphonalia compacta Suter, 1917 † accepted as Nassicola compacta (Suter, 1917) †
• Siphonalia concinna A. Adams, 1863
• Siphonalia conspersa A. Adams, 1863 (uncertain > taxon inquirendum)
• Siphonalia corrugata A. Adams, 1863 accepted as Siphonalia cassidariaeformis (Reeve, 1846)
• Siphonalia cotteri Vredenburg, 1924 † (uncertain > unassessed)
• Siphonalia dainitiensis Makiyama, 1927 †
• Siphonalia declivis Yokoyama, 1926 †
• Siphonalia dentifera K. Martin, 1895 †
• Siphonalia dilatata (Quoy & Gaimard, 1833) accepted as Penion sulcatus (Lamarck, 1816)
• Siphonalia dilatata var. subrecta Ihering, 1899 † accepted as Penion subrectus (Ihering, 1899) †
• Siphonalia dubia Packard, 1922 † accepted as Saturnus dubius (Packard, 1922) †
• Siphonalia elegans Suter, 1917 † accepted as Aeneator elegans (Suter, 1917)
• Siphonalia excelsa Suter, 1917 † accepted as Glaphyrina excelsa (Suter, 1917) †
• Siphonalia filosa A. Adams, 1863 accepted as Siphonalia spadicea (Reeve, 1847)
• Siphonalia flexuosa P. Marshall, 1918 † accepted as Austrofusus flexuosus (P. Marshall, 1918) †
• Siphonalia fortini Chédeville, 1904 † accepted as Pseudoneptunea fortini (Chédeville, 1904) †
• Siphonalia fuscolineata (Pease, 1860) accepted as Siphonalia spadicea (Reeve, 1847)
• Siphonalia fusoides (Reeve, 1846)
• Siphonalia grisea A. Adams, 1863 accepted as Siphonalia cassidariaeformis (Reeve, 1846)
• Siphonalia heptoides Cossmann, 1903 †
• Siphonalia hinnulus (A. Adams & Reeve, 1850)
• Siphonalia hirasei Kuroda & T. Habe, 1961
• Siphonalia hyperodon Pilsbry, 1895 accepted as Siphonalia mikado Melvill, 1888
• Siphonalia kalpanae Banerjee & Halder, 2024 †
• Siphonalia kawaensis Bartrum, 1919 † accepted as Zelandiella propenodosa (Bartrum, 1919) †
• Siphonalia kelletti [sic] accepted as Kelletia kelletii (Forbes, 1852)
• Siphonalia kellettioides Yokoyama, 1928 † accepted as Hemifusus kellettioides (Yokoyama, 1928) †
• Siphonalia kempi Maury, 1910 † accepted as Aurantilaria kempi (Maury, 1910) †
• Siphonalia kikaigashimana Y. Hirase, 1908
• Siphonalia krimica Gorbach, 1972 † (uncertain > taxon inquirendum)
• Siphonalia kuronoi T. C. Lan & Goto, 2004
• Siphonalia laddi MacNeil, 1961 accepted as Manaria kuroharai Azuma, 1960
• Siphonalia lamellifera Tate, 1888 † accepted as Penion lamellifera (Tate, 1888) † accepted as Australaria lamellifera (Tate, 1888) †
• Siphonalia leei S.-Q. Zhang & S.-P. Zhang, 2018
• Siphonalia ligata A. Adams, 1863 (uncertain)