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Prieto, C. E., Quiñonero-Salgado, S., Ruiz-Cobo, J. & Alonso, Á. (2020). Shells of Papilloderma Wiktor, Martín and Castillejo, 1990 (Gastropoda, Eupulmonata, Papillodermatoidea) found in caves reveal an unknown dwarf hypogean species. Journal of Conchology. 43 (6): 641-653.
Prieto, C. E., Quiñonero-Salgado, S., Ruiz-Cobo, J. & Alonso, Á. (2020). Shells of Papilloderma Wiktor, Martín and Castillejo, 1990 (Gastropoda, Eupulmonata, Papillodermatoidea) found in caves reveal an unknown dwarf hypogean species. Journal of Conchology. 43 (6): 641-653.