Traits Taxon list
Aarchaeocidaris Webster, 1997 † accepted as Palaechinus McCoy, 1844 †
Aarchaeocidaris strawberryensis Webster, 1997 †
Abatus Troschel, 1851
Abatus (Pseudabatus) Koehler, 1911
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 Vadet, 1991 † accepted as Plegiocidaris Pomel, 1883 †
Abelleicidaris borjnadorensis Vadet, Marignac, Nicolleau & Reboul, 2007 †
Abertella Durham, 1953 †
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) †
Abertellidae Durham, 1955 †
Absurdaster Kroh, Lukeneder & Gallemí, 2014 †
Absurdaster hungaricus Kroh, Lukeneder & Gallemí, 2014 †
Absurdaster meriani (Ooster, 1865) †
Absurdaster puezensis Kroh, Lukeneder & Gallemí, 2014 †
Acanthechinus Duncan & Sladen, 1882 †
Acanthechinus dixiei (Cooke, 1941) †
Acanthocidaris Mortensen, 1903
Acanthocidaris curvatispinis (Bell, 1892)
Acanthocidaris hastigera A. Agassiz & H.L. Clark, 1907
Acanthocidaris maculicollis (de Meijere, 1904)
Aceste Thomson, 1877
Aceste bellidifera Thomson, 1877
Aceste ovata A. Agassiz & H.L. Clark, 1907
Aceste weberi Koehler, 1914
Acriaster Smith in Smith & Bengtson, 1991 †
Acriaster sergipensis Smith in Smith & Benggtson, 1991 †
Acrocidaris L. Agassiz, 1840 †
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 †
Acroechinoidea (unaccepted )
Acrolusia Lambert, 1920 †
Acrolusiidae Mintz, 1968 †
Acropeltidae Lambert & Thiéry, 1914 †
Acropeltis L. Agassiz, 1838 †
Acropeltis atlantica Rey, Taj-Eddine & Witam, 1989 †
Acrosalenia L. Agassiz, 1840 †
Acrosalenia (Acrosalenia) L. Agassiz, 1840 †
Acrosalenia (Milnia) Haime, 1849 †
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 †
Acrosaleniidae Gregory, 1900 †
Acrosaster Lambert, 1910 †
Actapericulum Holmes, 1995 †
Actapericulum bicarinatum Holmes, 1995 †
Actinophyma Cotteau & Gauthier, 1895 †
Adelopneustes Gauthier, 1889 †
Adelopneustes ernsti Smith & Gallemí in Smith, Gallemí, Jeffery, Ernst & Ward, 1999 †
Adelopneustes montainvillensis (Sorignet, 1850) †
Adetaster Lambert, 1895 † (uncertain > unassessed )
Adytaster Lambert, 1895 † (uncertain > unassessed )
Aeolopneustes Duncan & Sladen, 1882 †
Aeropsidae Lambert, 1896
Aeropsis Mortensen, 1907
Aeropsis fulva (A. Agassiz, 1898)
Aeropsis rostrata (Norman, 1876)
Agassizia Valenciennes, 1846