Isoperla silesica, Illies, 1952

Murányi, Dávid, 2011, Balkanian species of the genus Isoperla Banks, 1906 (Plecoptera: Perlodidae), Zootaxa 3049, pp. 1-46 : 4

silesica group

This new group can be diagnosed by the medial penial armature being divided into an upper and a lower portion, both consisting of spike-like scales. Additionally, this group lacks lateral penial armature and has bald areas between the upper and lower portion of the medial penial armature. Wolfram Graf (pers. comm.), has also detected a lower medial penial armature in I. zwicki , a character not mentioned in the original description ( Tierno de Figueroa & Fochetti 2001a). The following species, I. silesica , I. breviptera Ikonomov, 1980 , I. vevcianensis Ikonomov, 1980 and I. zwicki , are included in this group.