Traits Taxon list
Aarchaeocidaris strawberryensis Webster, 1997 †
Abatus (Pseudabatus) nimrodi (Koehler, 1911)
Abatus agassizii Mortensen, 1910
Abatus beatriceae (Larrain, 1986)
Abatus cavernosus (Philippi, 1845)
Abatus cavernosus bidens Mortensen, 1910
Abatus cavernosus cavernosus (Philippi, 1845)
Abatus cordatus (Verrill, 1876)
Abatus curvidens Mortensen, 1936
Abatus elongatus (Koehler, 1908) accepted as Abatus koehleri (Thiéry, 1909)
Abatus ingens Koehler, 1926
Abatus kieri McKinney, McNamara & Wiedman, 1988 †
Abatus koehleri (Thiéry, 1909)
Abatus nimrodi (Koehler, 1911) accepted as Pseudabatus nimrodi Koehler, 1911 accepted as Abatus (Pseudabatus) nimrodi (Koehler, 1911)
Abatus philippii Lovén, 1871
Abatus shackletoni Koehler, 1911
Abelleicidaris borjnadorensis Vadet, Marignac, Nicolleau & Reboul, 2007 †
Abertella aberti (Conrad, 1842) †
Abertella cazonesensis (Kew in Dickerson & Kew, 1917) †
Abertella complanata Brito, 1981 † accepted as Placatenella complanata (Brito, 1981) †
Abertella dengleri Osborne & Ciampaglio, 2010 †
Abertella floridana (Cooke, 1942) † accepted as Abertella aberti (Conrad, 1842) †
Abertella gualichensis Martínez, Reichler & Mooi, 2005 †
Abertella habanensis (Sanchez Roig, 1949) †
Abertella kewi Durham, 1957 †
Abertella miskellyi Kroh, Mooi, del Rió & Neumann, 2013 †
Abertella palmeri Durham, 1957 †
Abertella pirabensis (Marchesini Santos, 1958) †
Absurdaster hungaricus Kroh, Lukeneder & Gallemí, 2014 †
Absurdaster meriani (Ooster, 1865) †
Absurdaster puezensis Kroh, Lukeneder & Gallemí, 2014 †
Abyssocucumis abyssorum (Théel, 1886)
Abyssocucumis albatrossi (Cherbonnier, 1941)
Acanthechinus dixiei (Cooke, 1941) †
Acanthocidaris curvatispinis (Bell, 1892)
Acanthocidaris hastigera A. Agassiz & H.L. Clark, 1907
Acanthocidaris maculicollis (de Meijere, 1904)
Acanthotrochus antarcticus Belyaev & Mironov, 1981
Acanthotrochus mirabilis Danielssen & Koren, 1881
Acanthotrochus multispinus Belyaev & Mironov, 1981
Acaudina bacilla Cherbonnier & Féral, 1981
Acaudina demissa (Sluiter, 1901)
Acaudina leucoprocta (H.L. Clark, 1938)
Acaudina molpadioides (Semper, 1867)
Acaudina pellucida (Semper, 1867)
Acaudina punctata (Sluiter, 1887)
Acaudina rosettis O'Loughlin & Ong, 2015
Acaudina spinifera Teoh & Woo, 2022
Acaudina suspecta Cherbonnier & Féral, 1981
Aceste bellidifera Thomson, 1877
Aceste ovata A. Agassiz & H.L. Clark, 1907
Aceste weberi Koehler, 1914
Achiridota inermis (Fisher, 1907)
Achiridota profunda Heding, 1935
Achiridota smirnovi O'Loughlin & VandenSpiegel, 2010
Achlyonice ecalcarea Théel, 1879
Achlyonice gilpinbrowni (Pawson, 1965)
Achlyonice longicornis Bohn, 2006
Achlyonice margitae Gebruk, 1997
Achlyonice monactinica Ohshima, 1915
Achlyonice myriamae Gebruk, 1997
Achlyonice tui (Pawson, 1965)
Acriaster sergipensis Smith in Smith & Benggtson, 1991 †
Acrocidaris arginensis Weber, 1934 †
Acrocidaris borissiaki Weber, 1934 †
Acrocidaris cazioti Lambert, 1926 †
Acrocidaris crenulata Mercier, 1935 †
Acrocidaris marocense Vadet, Marignac, Nicolleau & Reboul, 2007 †
Acrocidaris nicolleaui Vadet & Nicolleau, 2000 †
Acropeltis atlantica Rey, Taj-Eddine & Witam, 1989 †
Acrosalenia arabica Kier, 1972a †
Acrosalenia basseae Lambert, 1936 †
Acrosalenia bowersi Kier, 1972a †
Acrosalenia dhrumaensis Kier, 1972a †
Acrosalenia gananensis Stefanini, 1931 †
Acrosalenia gauthieri Cotteau, 1879 †
Acrosalenia jauberti (Cotteau, 1881) †
Acrosalenia marratensis Kier, 1972a †
Acrosalenia mathildae Lambert, 1935 †
Acrosalenia microstoma Besairie, 1936 †
Acrosalenia mideltensis Vadet, Nicolleau & Reboul, 2010 †
Acrosalenia pentagona Cotteau, 1879 †
Acrosalenia smelliei Currie, 1925 †
Acrosalenia somaliensis Currie, 1925 †
Acrosalenia spinosa Agassiz, 1840 †
Acrosalenia termieri Lambert, 1931 †
Acrosalenia wylliei Currie, 1925 †
Acrosalenia zararensis Lambert, 1937 †
Actapericulum bicarinatum Holmes, 1995 †
Actinia doliolum Pallas, 1766 accepted as Pentacta doliolum (Pallas, 1766)
Actinocucumis chinensis Liao & Pawson, 2001
Actinocucumis cornus (Heding, 1934)
Actinocucumis difficilis Bell, 1884
Actinocucumis longipedes H.L. Clark, 1938
Actinocucumis quinquangularis (Sluiter, 1901)
Actinocucumis simplex (Sluiter, 1914)
Actinocucumis solanderi O'Loughlin in O'Loughlin et al., 2014
Actinocucumis typica Ludwig, 1875
Actinopyga agassizi (Selenka, 1867) accepted as Actinopyga agassizii (Selenka, 1867)
Actinopyga agassizii (Selenka, 1867)