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Abstract
A new species of the genus Isoperla (Plecoptera, Perlodidae), belonging to the oxylepis species-group is described, and the male mating call is characterized. Its range falls within a small region of the Southern Limestone Alps which is well known to be one endemism-centre of aquatic insects.
Highlights
The genus Isoperla consists of about 150 species (DeWalt et al 2011, Baumann and Lee 2009, Murányi 2011, Szczytko and Stewart 1979, Zwick and Surenkhorloo 2005) and covers the Holarctic and Oriental regions
A series of specimens were collected from the Karawanken Alps in southern Austria and the nearby Kamnik Alps in northern Slovenia deviating from all hitherto known species
The holotype is deposited at the Linzer Landesmuseum, Linz, Austria, paratypes are stored in the first author's collection
Summary
The genus Isoperla consists of about 150 species (DeWalt et al 2011, Baumann and Lee 2009, Murányi 2011, Szczytko and Stewart 1979, Zwick and Surenkhorloo 2005) and covers the Holarctic and Oriental regions. In Europe 56 species are known so far (Graf et al 2009, Murányi 2011), of which ten occur in Austria (Graf 2010). Isoperla is a morphologically difficult genus, especially the gramma tica and tripartita species groups that both exhibit high variability, and requires further resolution. A series of specimens were collected from the Karawanken Alps in southern Austria and the nearby Kamnik Alps in northern Slovenia deviating from all hitherto known species.
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