Classification of the genus Coulonia
G. †Coulonia de Loriol 1874
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†Coulonia caseyi Gale 2020
†Coulonia colei Forbes 1852
†Coulonia neocomiensis de Loriol 1874
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Invalid names: Cuneaster hauteriviensis Hess 1955 [synonym]
†Coulonia parva Neumann and Hess 2001
†Coulonia platispina Hess and Blake 1995
†Coulonia platyspina Hess and Blake 1995
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Invalid names: Betelgeusia orientalis Blake and Reboul 2011 [synonym]
Invalid names: Betelgeusia Blake and Reid 1998 [synonym], Cuneaster Hess 1955 [objective synonym]