Biodiversity Data Journal (Jun 2022)

A new giant keelback slug of the genus Limax from the Balkans, described by citizen scientists

  • Menno Schilthuizen,
  • Cameron Thompson,
  • Rick de Vries,
  • Anthonie van Peursen,
  • Marta Paterno,
  • Simone Maestri,
  • Luca Marcolongo,
  • Chiara Esposti,
  • Massimo Delledonne,
  • Iva Njunjić

Journal volume & issue
Vol. 10
pp. 1 – 15


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Despite their large size, striking colouration and genital extravagance, the taxonomy of the European giant keelback slugs of the genus Limax is still poorly understood. Preliminary morphological and molecular data suggest that many unnamed or unrecognised species exist, especially in the Alps, the Mediterranean and the Balkans.We organised a citizen science expedition to Durmitor National Park in Montenegro and discovered a new species, genetically distinct, but morphologically similar to the sympatric L. cinereoniger Wolf 1803 and describe it as L. pseudocinereoniger.