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Hutterer, R. & Groh, K. (1991). Two new species of Cryptella (Gastropoda: Parmacellidae) from Lanzarote and Alegranza, Canary Islands. Bonner Zoologische Beiträge, 42 (34): 339-352. Bonn.
Hutterer, R. & Groh, K. (1991). Two new species of Cryptella (Gastropoda: Parmacellidae) from Lanzarote and Alegranza, Canary Islands. Bonner Zoologische Beiträge, 42 (34): 339-352. Bonn.