Distribution of the troglophile spider Porrhomma convexum (Westring, 1851) (Araneae: Linyphiidae), based on 86 occurrences.  This species inhabits caves, mines and other mesic habitats up to the alpine level. It is widely distributed in Europe (Nentwig et al. 2019).  
  Part of: Mammola S, Cardoso P, Angyal D, Balázs G, Blick T, Brustel H, Carter J, Ćurčić S, Danflous S, Dányi L, Déjean S, Deltshev C, Elverici M, Fernández J, Gasparo F, Komnenov M, Komposch C, Kováč L, Kunt KB, Mock A, Moldovan O, Naumova M, Pavlek M, Prieto CE, Ribera C, Rozwałka R, Růžička V, Vargovitsh RS, Zaenker S, Isaia M (2019) Continental data on cave-dwelling spider communities across Europe (Arachnida: Araneae). Biodiversity Data Journal 7: e38492. https://doi.org/10.3897/BDJ.7.e38492