Some taxonomic notes on Horatia spp. of the Balkans with the designation of the neotype of Horatia knorri Schütt, 1961 (Gastropoda: Hydrobiidae)

Abstract

The shell variation of Horatia klecakiana Bourguignat was studied based on large samples of at least 620 specimens from Bourguignat’s collection. To find the type locality Ribaric, we studied old maps of Bourguignat’s time and found that the valley of the Cetina river with the type locality of H. klecakiana had been flooded by lake Peruća in 1958. Horatia knorri Schütt is an enigmatic species because the holotype does not correspond to the original description. Thus we designate one of the depicted paratypes as the neotype.