Oscillograms of the male calling song in Isophya modestior across the range. Two groups (Group A and Group B) and two more subgroups (Subgroup B1 and Subgroup B2) can be separated on the basis of the calling song. Group A includes oscillograms A Lalinac (eastern Serbia, close to type locality) B Pinosava (central Serbia); Subgroup B1 includes oscillograms C Beočin (Pannonian Serbia) D Gudurica (Pannonian Serbia) E Carasova (Romania) F Mecsek (Hungary) G Loipersbach (Austria); Subgroup B2 includes oscillograms H Đerekare (Dinaric Alps, Serbia).

 
 
  Part of: Ivković S, Chobanov D, Horvat L, Iorgu IȘ, Hochkirch A (2022) Geographic differentiation in male calling song of Isophya modestior (Orthoptera, Tettigoniidae, Phaneropterinae). ZooKeys 1122: 107-123. https://doi.org/10.3897/zookeys.1122.85721