Classification of the genus Mariacolpus
G. †Mariacolpus Petuch 1988
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†Mariacolpus aequistriatus Conrad 1863
†Mariacolpus covepointensis Petuch 2004
†Mariacolpus lindajoyceae Petuch 2004
†Mariacolpus octonaria Conrad 1863
†Turritella plebeia plebeia Ward 1992