Melogona transsylvanica (Verhoeff, 1897)

Fig. 6C, F

Material. 1 ♂, 1 ♀ (IBER), Bulgaria, Pernik District, v. Bosnek, opposite to the entrance of Duhlata Cave, by the left bank of Struma River, 03.III.2017, P. Mitov leg.

Descriptive notes. Syncolpocoxite (Fig. 6C, F) of anterior gonopods relatively broad, without distinct lateral corners and with broadly rounded or flattened apical margin. Apical part of angiocoxites (Fig. 6I) very similar to the condition in M. broelemanni, but the scoop/visor-like projection somewhat more pronounced. Apex of pseudoflagellum of posterior gonopods similar to that seen in M. sintica sp. nov., rather than to that in M. broelemanni.

Remarks. The species is new to the fauna of Bulgaria, the present record marking the southernmost point of its currently known distribution. Both gonopod pairs of the examined male specimen are particularly similar to those in the subspecies M. t. hungarica (Sziráki, 1967).