Petuch, E. J. (1992). New ecphoras (Gastropoda: Thaididae: Ecphorinae) from the Calvert Formation of Maryland (Langhian Miocene). <em>The Nautilus.</em> 106 (2): 68-71., available online athttps://www.biodiversitylibrary.org/page/8271308[details]
original descriptionPetuch, E. J. (1992). New ecphoras (Gastropoda: Thaididae: Ecphorinae) from the Calvert Formation of Maryland (Langhian Miocene). <em>The Nautilus.</em> 106 (2): 68-71., available online athttps://www.biodiversitylibrary.org/page/8271308[details]
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