Classification of Cooke 1959

G. †Tylocidaris Pomel 1883
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Tylocidaris salina Cooke 1959
Tylocidaris walcotti Clark 1891
G. Salenia Gray 1835
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Salenia tumidula Clark 1801
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Invalid names: Salenia bellula Clark 1801 [synonym]
G. †Phymotaxis Lambert and ThiĆ©ry 1914
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Phymotaxis mansfieldi Cooke 1941
G. Clypeaster Lamarck 1801
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Clypeaster cotteaui Egozcue 1897
Clypeaster oxybaphon Jackson 1922
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Invalid names: Clypeaster pinarensis Lambert and Sanchez-Roig 1949 [synonym], Clypeaster platygaster Jackson 1922 [synonym], Clypeaster polygonalis Sanchez-Roig 1949 [synonym], Clypeaster profundus Sanchez-Roig 1949 [synonym]
Clypeaster rogersi Morton 1834
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Invalid names: Clypeaster douvillei Stefanini 1911 [synonym], Clypeaster marinanus Jackson 1937 [synonym], Scutella jonesi Forbes 1845 [synonym]
G. †Protoscutella Stefanini 1924
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Protoscutella mississippiensis Clark and Twitchell 1915
G. Cassidulus Lamarck 1801
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Cassidulus gouldii Bouve 1846
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Invalid names: Cassidulus (Cassidulus) alabamensis Clark and Twitchell 1915 [synonym]
G. Echinolampas Gray 1825
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Echinolampas aldrichi Clark and Twitchell 1915
G. †Echinocorys Leske 1778
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Echinocorys ovalis Clark 1893
G. Cyclaster Cotteau 1856
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Cyclaster drewryensis Cooke 1942
G. Hemiaster Agassiz and Desor 1847 [heart urchin]
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Hemiaster moscovensis Cooke 1959
Hemiaster parastatus Morton 1833
Hemiaster stella Morton 1830
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Invalid names: Hemiaster incrassatus Clark 1891 [synonym]
G. Lovenia Desor 1847
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Lovenia alabamensis Cooke 1959
G. Maretia Gray 1855
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Maretia arguta Clark and Twitchell 1915
G. Paraster Pomel 1869
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Paraster armiger Clark and Twitchell 1915
Fm. Schizasteridae Lambert 1905
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G. Agassizia Valenciennes 1846
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Subg. †Agassizia (Anisaster) Pomel 1886
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G. †Linthia Desor 1853
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Linthia alabamensis Clark and Twitchell 1915
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Invalid names: Linthia maverickensis Gardner 1935 [synonym]
Linthia prima Cooke 1942
Fm. Echinidae Gray 1825
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G. †Gagaria Duncan 1889
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Gagaria chickasawhay Cooke 1941
Gagaria mossomi Cooke 1941
Fm. Cidaridae Gray 1825
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G. Cidaris Leske 1778
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Cidaris splendens Morton 1841
Fm. †Phymosomatidae Pomel 1883
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G. †Gauthieria Lambert 1891
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Gauthieria speciosa Clark 1801
Fm. Arbaciidae Gray 1855
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G. †Arbia Cooke 1948
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Arbia aldrichi Clark and Twitchell 1915
Fm. Echinoneidae Agassiz and Desor 1847
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G. †Rhopostoma Cooke 1959
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Rhopostoma cruciferum Morton 1830
Fm. Brissidae Gray 1855
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G. Eupatagus Agassiz 1847
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Subg. †Eupatagus (Brissopatagus) Cotteau 1863
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Invalid names: Eupatagus (Brissopatagus) georgianus Cooke 1942 [synonym]
Fm. †Orthopsidae Duncan 1889
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G. †Echinopsis Agassiz 1840
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Echinopsis diatreta Morton 1833
Fm. Cassidulidae Agassiz and Desor 1847
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G. †Echanthus Cooke 1942
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Echanthus georgiensis Clark and Twitchell 1915
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Invalid names: Cassidulus (Galerolampas) fontis Cooke 1942 [synonym]
Fm. †Holasteridae Pictet 1857
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G. †Holaster Agassiz 1836
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Holaster cinctus Morton 1830
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Invalid names: Cardiaster fimbriatus Morton 1830 [synonym]