Nordsieck, H. (1999). Symptychiella annae n. sp., an extraordinary clausiliid from northern Peru (Gastropoda Pulmonata: Clausiliidae). Basteria. 63: 165-170.
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Nordsieck, H.
1999
Symptychiella annae n. sp., an extraordinary clausiliid from northern Peru (Gastropoda Pulmonata: Clausiliidae)