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Parent H., Scherzinger A., Schweigert G. (2008) Sexual phenomena in Late Jurassic Aspidoceratidae (Ammonoidea). Dimorphic correspondence between Physodoceras hermanni (BERCKHEMER) and Sutneria subeumela SCHNEID, and first record of possible hermaphroditism // Paleodiversity. Vol.1. P.181-188.



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