• Alcyonium ascidioides Pallas, 1774 accepted as Distomus variolosus Gaertner, 1774
• Alcyonium aurantium Pallas, 1766 accepted as Tethya aurantium (Pallas, 1766)
• Alcyonium boletiforme Lamarck, 1815 accepted as Polymastia boletiformis (Lamarck, 1815)
• Alcyonium boletus Lamarck, 1815 accepted as Thorectandra boletus (Lamarck, 1815)
• Alcyonium bulbosum Esper, 1794 accepted as Suberites domuncula (Olivi, 1792)
• Alcyonium cidaris Lamarck, 1815 accepted as Geodia cidaris (Lamarck, 1815)
• Alcyonium compactum Lamarck, 1815 accepted as Suberites domuncula (Olivi, 1792)
• Alcyonium cotoneum Pallas, 1766 accepted as Geodia cydonium (Linnaeus, 1767)
• Alcyonium cranium Müller, 1776 accepted as Craniella cranium (Müller, 1776)
• Alcyonium cuspidiferum Lamarck, 1815 accepted as Cervicornia cuspidifera (Lamarck, 1815)
• Alcyonium cydonium Linnaeus, 1767 accepted as Geodia cydonium (Linnaeus, 1767)
• Alcyonium cylindricum Lamarck, 1815 accepted as Neopetrosia cylindrica (Lamarck, 1815)
• Alcyonium distortum Lamarck, 1815 accepted as Petrosia (Petrosia) ficiformis (Poiret, 1789)
• Alcyonium domuncula Olivi, 1792 accepted as Suberites domuncula (Olivi, 1792)
• Alcyonium ensiferum Lamarck, 1815 accepted as Homaxinella ensifera (Lamarck, 1815)
• Alcyonium epiphytum Lamarck, 1815 accepted as Protosuberites epiphytum (Lamarck, 1815)
• Alcyonium granulatum Esper, 1829 accepted as Myrmekioderma granulatum (Esper, 1829)
• Alcyonium lyncurium Linnaeus, 1767 accepted as Tethya aurantium (Pallas, 1766)
• Alcyonium manus sensu Esper, 1794 accepted as Halichondria (Halichondria) panicea (Pallas, 1766)
• Alcyonium manusdiaboli Linnaeus, 1767 accepted as Halichondria (Halichondria) panicea (Pallas, 1766)
• Alcyonium massa Müller, 1776 (uncertain)
• Alcyonium medullare Lamarck, 1815 accepted as Halichondria (Halichondria) panicea (Pallas, 1766)
• Alcyonium opuntioides Lamarck, 1815 accepted as Antho (Antho) opuntioides (Lamarck, 1815)
• Alcyonium paniceum (Pallas, 1766) accepted as Halichondria (Halichondria) panicea (Pallas, 1766)
• Alcyonium papillosum Lamarck, 1815 accepted as Phoriospongia papillosa (Lamarck, 1815)
• Alcyonium papillosum Pallas, 1766
• Alcyonium phalloides Lamarck, 1815 (uncertain)
• Alcyonium purpureum Lamarck, 1815 accepted as Spheciospongia purpurea (Lamarck, 1815)
• Alcyonium putridosum Lamarck, 1815 accepted as Oceanapia putridosa (Lamarck, 1815)
• Alcyonium pyrifera Delle Chiaje, 1828 accepted as Rhizaxinella pyrifera (Delle Chiaje, 1828)
• Alcyonium sceptrum Lamarck, 1815 accepted as Agelas sceptrum (Lamarck, 1815)
• Alcyonium testudinarium Lamarck, 1815 accepted as Xestospongia testudinaria (Lamarck, 1815)
• Alcyonium vesparium Lamarck, 1815 accepted as Spheciospongia vesparium (Lamarck, 1815)