Map (above) and virtual aerial view (below, from the North) with mentioned caves for Asturian-Cantabrian Zospeum species: Z. percostulatum (♦); Z. schaufussi / suarezi (●). Map made with Dmap; aerial view of Digital Globe (screen shot of Google Earth).

 
 
  Part of: Alonso A, Prieto CE, Quiñonero-Salgado S, Rolán E (2018) A morphological gap for Iberian Zospeum filled: Zospeum percostulatum sp. n. (Gastropoda, Eupulmonata, Carychiidae) a new species from Asturias (Spain). Subterranean Biology 25: 35-48. https://doi.org/10.3897/subtbiol.25.23364