After Grande & Lundberg, 1988

Astephus Cope, 1873
        Pimelodus
        RhineastesAstephus resimus Lundberg, 1975a

        †Astephus antiquus (Leidy, 1873a)
            †Pimelodus antiquus Leidy, 1873a
            †Rhineastes calvus Cope, 1873
            †Rhineastes arcuatus Cope, 1873
            †Amiurus primaevus Eastman, 1917
            †Astephus calvus ( Cope, 1873)

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