Classification of Grant and Hertlein 1938

Ph. Echinodermata Klein 1754
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Cl. Echinoidea Leske 1778 [sea urchin]
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Or. Cidaroidea Claus 1880
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Subor. Camarodonta Jackson 1912
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Fm. Echinidae Gray 1825
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G. Echinus Linnaeus 1758
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Echinus anchistus Clark 1912
Echinus euryporus Clark 1909
Echinus horridus Agassiz 1879
G. Lytechinus Agassiz 1863
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†Lytechinus coreyi Grant and Hertlein 1938
†Lytechinus milleri Grant and Hertlein 1938
†Lytechinus pictus Verrill 1867
†Lytechinus semituberculatus Agassiz and Desor 1867
G. Toxopneustes Agassiz 1841
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Toxopneustes rosea Agassiz 1863
G. Tripneustes Agassiz 1841
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Tripneustes depresss Agassiz 1863
Tripneustes gratilla Linnaeus 1758
Fm. Echinometridae Gray 1855
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G. Echinometra Gray 1825
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Echinometra oblonga Blainville 1825
Echinometra vanbrunti Agassiz 1863
Fm. Strongylocentrotidae Gregory 1900
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G. Caenocentrotus Clark 1912
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Caenocentrotus gibbosus Agassiz and Desor 1846
G. Loxechinus Desor 1856
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Loxechinus albus Molina 1782
Or. Exocycloida Jackson
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Fm. Cassidulidae Agassiz and Desor 1847
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G. Cassidulus Lamarck 1801
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†Cassidulus pacificus Agassiz 1869
G. †Catopygus
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G. Rhynchopygus d'Orbigny 1856
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†Rhynchopygus californicus Anderson 1905
Fm. Spatangidae Gray 1825
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G. Brissopsis Agassiz 1840
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†Brissopsis columbaris Agassiz 1840
†Brissopsis pacifica Agassiz 1898
G. Brissus Gray 1825
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†Brissus kewi Grant and Hertlein 1938
†Brissus latecarinatus Leske 1778
G. Eupatagus Agassiz 1847
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†Eupatagus stevensi Grant and Hertlein 1938
G. †Gonimaretia Clark 1917
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†Gonimaretia laevis Clark 1917
G. Lovenia Desor 1847
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†Lovenia cordiformis Agassiz 1872
G. Macropneustes Agassiz 1847
G. Maretia Gray 1855
G. †Megapetalus Clark 1929 [heart urchin]
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G. Meoma Gray 1851
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†Meoma grandis Gray 1852
G. Metalia Gray 1855
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†Metalia spatagus Linnaeus 1758
G. Spatangus Gray 1825
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†Spatangus californicus Clark 1917
†Spatangus rarus Israelsky 1923
†Spatangus tapinus Schenck 1928
Subor. Echinoneina Clark 1925
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Fm. †Conulidae Lambert 1911
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G. †Amblypygus Agassiz 1840
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†Amblypygus subhemisphericus Israelsky 1923
Fm. Echinoneidae Agassiz and Desor 1847
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G. Echinoneus Leske 1778
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†Echinoneus burgeri Grant and Hertlein 1938
G. †Paleoechinoneus Grant and Hertlein 1938
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†Paleoechinoneus hannai Grant and Hertlein 1938
Invalid names: Clypeastrina [empty], Spatangina Jackson [empty]
Invalid names: Centrechinoida Jackson [empty]
G. †Loveina Simpson 1940
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†Loveina hemphilli Israelsky 1923
Or. Cidaroidea Claus 1880
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Fm. Cidaridae Gray 1825
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G. †Centrocidaris Agassiz 1904
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†Centrocidaris doderleini Agassiz 1898
G. Cidaris Leske 1778
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†Cidaris californicus Clark 1893
†Cidaris dilleri Clark and Twitchell 1915
†Cidaris lorenzanus Kew 1920
†Cidaris plumasensis Clark and Twitchell 1915
†Cidaris shastensis Clark and Twitchell 1915
†Cidaris taylorensis Clark 1893
†Cidaris tehamaensis Clark and Twitchell 1915
Invalid names: Calocidaris Clark 1907 [synonym], Dorocidaris Agassiz 1869 [synonym]
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†Eucidaris thouarsii Valencienncs 1846
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G. †Hesperocidaris Mortensen 1928
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†Hesperocidaris dubia Clark 1907
†Hesperocidaris merriami Arnold 1908
†Hesperocidaris panamensis Agassiz 1898
G. Histocidaris Mortensen 1903
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†Histocidaris cobosi Agassiz 1898
†Echinarachnius gabbi Rémond 1863
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†Echinarachnius gabbi kleinpelli Grant and Hertlein 1938
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