Reference

Maja Przybycien, Dorota Lachowska-Cierlik, Benjamin Waclawik, Peter Sprick, S. Knutelski (2021): The species status of the Otiorhynchus clavipes (Bonsdorff, 1785) species group (Coleoptera: Curculionidae): an integrative approach using molecular, morphological, ecological, and biogeographical data – Bonn zoological Bulletin - früher Bonner Zoologische Beiträge. – 70: 115 - 139.