• Abatus (Pseudabatus) nimrodi (Koehler, 1911): Endoskeleton
• Abatus agassizii Mortensen, 1910: Endoskeleton
• Abatus beatriceae (Larrain, 1986): Endoskeleton
• Abatus cavernosus (Philippi, 1845): Endoskeleton
• Abatus cordatus (Verrill, 1876): Endoskeleton
• Abatus curvidens Mortensen, 1936: Endoskeleton
• Abatus ingens Koehler, 1926: Endoskeleton
• Abatus kieri McKinney, McNamara & Wiedman, 1988 †: Endoskeleton
• Abatus koehleri (Thiéry, 1909): Endoskeleton
• Abatus philippii Lovén, 1871: Endoskeleton
• Abatus shackletoni Koehler, 1911: Endoskeleton
• Abertella aberti (Conrad, 1842) †: Endoskeleton
• Abertella cazonesensis (Kew in Dickerson & Kew, 1917) †: Endoskeleton
• Abertella dengleri Osborne & Ciampaglio, 2010 †: Endoskeleton
• Abertella gualichensis Martínez, Reichler & Mooi, 2005 †: Endoskeleton
• Abertella habanensis (Sanchez Roig, 1949) †: Endoskeleton
• Abertella kewi Durham, 1957 †: Endoskeleton
• Abertella miskellyi Kroh, Mooi, del Rió & Neumann, 2013 †: Endoskeleton
• Abertella palmeri Durham, 1957 †: Endoskeleton
• Abertella pirabensis (Marchesini Santos, 1958) †: Endoskeleton
• Absurdaster hungaricus Kroh, Lukeneder & Gallemí, 2014 †: Endoskeleton
• Absurdaster meriani (Ooster, 1865) †: Endoskeleton
• Absurdaster puezensis Kroh, Lukeneder & Gallemí, 2014 †: Endoskeleton
• Abyssaster diadematus (Sladen, 1883): Endoskeleton
• Abyssaster planus (Sladen, 1883): Endoskeleton
• Abyssaster tara (Wood-Mason & Alcock, 1891): Endoskeleton
• Abyssocucumis abyssorum (Théel, 1886): Endoskeleton
• Abyssocucumis albatrossi (Cherbonnier, 1941): Endoskeleton
• Abyssoprimnoa gemina Cairns, 2015: Endoskeleton
• Abyssura brevibrachia Belyaev & Litvinova, 1976: Endoskeleton
• Acanthacis austera Deichmann, 1936: Endoskeleton
• Acanthacis scabra Deichmann, 1936: Endoskeleton
• Acanthascus (Acanthascus) alani Ijima, 1898: Endoskeleton
• Acanthascus (Acanthascus) cactus Schulze, 1886: Endoskeleton
• Acanthascus (Acanthascus) koltuni Reiswig & Stone, 2013: Endoskeleton
• Acanthascus (Acanthascus) malacus Reiswig, 2014: Endoskeleton
• Acanthascus (Acanthascus) pachyderma Okada, 1932: Endoskeleton
• Acanthascus (Acanthascus) platei Schulze, 1899: Endoskeleton
• Acanthascus (Acanthascus) profundus Koltun, 1967: Endoskeleton
• Acanthascus (Acanthascus) sacculus Ferrer Hernández, 1932: Endoskeleton
• Acanthascus (Rhabdocalyptus) arcticus (Brøndsted, 1916): Endoskeleton
• Acanthascus (Rhabdocalyptus) asper (Schulze, 1899): Endoskeleton
• Acanthascus (Rhabdocalyptus) australis (Topsent, 1901): Endoskeleton
• Acanthascus (Rhabdocalyptus) baculifer (Schulze, 1904): Endoskeleton
• Acanthascus (Rhabdocalyptus) bidentatus (Okada, 1932): Endoskeleton
• Acanthascus (Rhabdocalyptus) borealis (Okada, 1932): Endoskeleton
• Acanthascus (Rhabdocalyptus) capillatus (Ijima, 1897): Endoskeleton
• Acanthascus (Rhabdocalyptus) dawsoni (Lambe, 1893): Endoskeleton
• Acanthascus (Rhabdocalyptus) gomezi (Tabachnick & Fromont, 2019): Endoskeleton
• Acanthascus (Rhabdocalyptus) heteraster (Okada, 1932): Endoskeleton
• Acanthascus (Rhabdocalyptus) lophodigitatus (Kirkpatrick, 1901): Endoskeleton
• Acanthascus (Rhabdocalyptus) mirabilis (Schulze, 1899): Endoskeleton
• Acanthascus (Rhabdocalyptus) mollis (Schulze, 1886): Endoskeleton
• Acanthascus (Rhabdocalyptus) monstraster (Tabachnick, 1994): Endoskeleton
• Acanthascus (Rhabdocalyptus) nodulosus (Schulze, 1899): Endoskeleton
• Acanthascus (Rhabdocalyptus) tener (Schulze, 1899): Endoskeleton
• Acanthascus (Rhabdocalyptus) tenuis (Schulze, 1899): Endoskeleton
• Acanthascus (Rhabdocalyptus) trichotis (Reiswig, 2018): Endoskeleton
• Acanthascus (Rhabdocalyptus) unguiculatus (Ijima, 1904): Endoskeleton
• Acanthascus (Rhabdocalyptus) victor (Ijima, 1897): Endoskeleton
• Acanthascus (Staurocalyptus) affinis (Ijima, 1904): Endoskeleton
• Acanthascus (Staurocalyptus) celebesianus (Ijima, 1927): Endoskeleton
• Acanthascus (Staurocalyptus) dowlingi (Lambe, 1893): Endoskeleton
• Acanthascus (Staurocalyptus) entacanthus (Ijima, 1904): Endoskeleton
• Acanthascus (Staurocalyptus) fasciculatus (Schulze, 1899): Endoskeleton
• Acanthascus (Staurocalyptus) fuca (Tabachnick, 1989): Endoskeleton
• Acanthascus (Staurocalyptus) glaber (Ijima, 1897): Endoskeleton
• Acanthascus (Staurocalyptus) hamatus (Lendenfeld, 1915): Endoskeleton
• Acanthascus (Staurocalyptus) heteractinus (Ijima, 1897): Endoskeleton
• Acanthascus (Staurocalyptus) microchetus (Ijima, 1898): Endoskeleton
• Acanthascus (Staurocalyptus) pamelaturnerae (Reiswig, 2018): Endoskeleton
• Acanthascus (Staurocalyptus) pleorhaphides (Ijima, 1897): Endoskeleton
• Acanthascus (Staurocalyptus) psilosus (Reiswig & Stone, 2013): Endoskeleton
• Acanthascus (Staurocalyptus) roeperi (Schulze, 1886): Endoskeleton
• Acanthascus (Staurocalyptus) rugocruciatus (Okada, 1932): Endoskeleton
• Acanthascus (Staurocalyptus) solidus (Schulze, 1899): Endoskeleton
• Acanthascus (Staurocalyptus) tubulosus (Ijima, 1904): Endoskeleton
• Acanthascus (Staurocalyptus) tylotus (Reiswig & Stone, 2013): Endoskeleton
• Acanthaster benziei Wörheide, Kaltenbacher, Cowan & Haszprunar, 2022: Endoskeleton
• Acanthaster brevispinus Fisher, 1917: Endoskeleton
• Acanthaster mauritiensis de Loriol, 1885: Endoskeleton
• Acanthaster planci (Linnaeus, 1758): Endoskeleton
• Acanthastrea brevis Milne Edwards & Haime, 1849: Endoskeleton
• Acanthastrea crenulata (Meneghini in d'Achiardi, 1868) †: Endoskeleton
• Acanthastrea dausi Chevalier, 1961 †: Endoskeleton
• Acanthastrea echinata (Dana, 1846): Endoskeleton
• Acanthastrea hemprichii (Ehrenberg, 1834): Endoskeleton
• Acanthastrea minuta Moll & Best, 1984: Endoskeleton
• Acanthastrea pachysepta (Chevalier, 1975): Endoskeleton
• Acanthastrea polygonalis Martin, 1880 †: Endoskeleton
• Acanthastrea rotundoflora Chevalier, 1975: Endoskeleton
• Acanthastrea subechinata Veron, 2000: Endoskeleton
• Acanthastrea termofurae Chevalier, 1961 †: Endoskeleton
• Acanthastrea turonensis Chevalier, 1961 †: Endoskeleton
• Acanthechinus dixiei (Cooke, 1941) †: Endoskeleton
• Acanthoaxis wirtzi van Ofwegen & McFadden, 2010: Endoskeleton
• Acanthochaetetes horiguchi (Mori, 1976): Endoskeleton
• Acanthochaetetes japonica (Mori, 1977): Endoskeleton
• Acanthochaetetes seunesi Fischer, 1970 †: Endoskeleton
• Acanthochaetetes wellsi Hartman & Goreau, 1975: Endoskeleton