A new species of the endemic Azorean zonitid subgenus Drouetia, Oxychilus (D). batalhana nov. spec., is described from the Island of São Miguel. Its very long flagellum separates it from all known Drouetia species.

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Nederlandse Malacologische Vereniging

A.J. de Winter. (1989). Remarks on the non-marine molluscan fauna of the Azores. 3. A new species of Drouetia from the Isle of São Miguel (Pulmonata: Zonitidae). Basteria, 53(1/3), 63–67.