Classification of Tucker and Feldmann 1990

Fm. Portunidae Rafinesque 1815 [swimming crab]
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G. †Portunites Bell 1858
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†Portunites alaskensis Rathbun 1926
Fm. Raninidae de Haan 1833
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G. †Eumorphocorystes Van Binkhorst 1857
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G. †Raninoides Feldmann et al. 1996
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†Raninoides vaderensis Rathbun 1926
Subfm. †Carcinoplacinae Milne-Edwards 1852
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G. †Branchioplax Rathbun 1916
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Subfm. Euryplacinae Stimpson 1871
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G. †Orbitoplax Tucker and Feldmann 1990
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†Orbitoplax plafkeri Tucker and Feldmann 1990