A first record of Ephoron virgo (Olivier, 1791) (Ephemeroptera: Polymitarcyidae) from the Sava River, with notes on its ecological preferences and rarity of findings in the region

Abstract

Ephoron virgo (Olivier, 1791) is an European burrowing filter-feeding mayfly species. Once common in large rivers, in XX century it became rare due to increased negative anthropogenic influences. In Serbia there was only one recent report of its presence, from the Danube River (Iron Gate area). The aim of this paper is to report on the first finding of E. virgo from the Sava River, and to discuss its scarce findings in the region. Three larval specimens were found in the Belgrade region in grab sample taken in 2014. In order to assess the development of the population in the region, a comprehensive investigation should be conducted.