Map of Europe showing the location of sampling sites a the Bastardech Cave (France) and its interior b the Towarna & Dzwonnica Caves (Poland) and its interior.

 
 
  Part of: Kocot-Zalewska J, DomagaƂa PJ, Lis B (2021) Living in isolation for almost 40 years: molecular divergence of the 28S rDNA and COI sequences between French and Polish populations of the cave beetle Speonomus normandi hydrophilus (Jeannel, 1907). Subterranean Biology 37: 75-88. https://doi.org/10.3897/subtbiol.37.54720