Isoperla oxylepis oxylepis ( Despax, 1936 )

Murányi, Dávid, 2011, Balkanian species of the genus Isoperla Banks, 1906 (Plecoptera: Perlodidae), Zootaxa 3049, pp. 1-46 : 4-8

Isoperla oxylepis oxylepis ( Despax, 1936)

( Figs. 7, 11, 17)

Chloroperla grammatica ssp. oxylepis Despax, 1936 — Despax 1936: 357 (original description of male)

Isoperla grammatica var. oxylepis ( Despax, 1936) — Claassen 1940: 204 (comb. n., catalog)

Isoperla grammatica forma oxylepis ( Despax, 1936) — Despax 1951: 101 (repr. of Despax 1936)

Isoperla oxylepis ( Despax, 1936) — Illies 1952b: 388 (stat. n., supplementary description of male), 401 (description of larva); Illies 1955: 100, 142 (repr. of Illies 1952); Winkler 1956: 335 (supplementary description of male); Winkler 1957: 62 (supplementary description of male and larva); Raušer 1962: 79 (comparative drawings of male); Illies 1966: 414 (catalog); Rupprecht 1969: 30 (drumming); Kimmins 1970: 347 (protolog); Zwick 1973: 249 (catalog); Kis 1974: 237 (supplementary description of male and female); Raušer 1980: 102 (supplementary description of larva).

Material examined: FRANCE: Auvergne region: Falgoux, Mts Cantal, Mars , 1200 m, 02.08.2004, leg., det. G. Vinçon: 1m 2f ( HNHM) ; AUSTRIA: Niederösterreich: Kaiserbrunn, Mts Raxalpe, Höllental , Schwarza River at Abbrenn bridge, 03.06.2006, leg. L. Dányi, Á. Vári: 5m 3f ( HNHM; one penial armature prepared on slide) ; SLO- VAKIA: Žilinský region: Mts Malá Fatra, Vrátna Stream , 06.07.1967, leg. H. Steinmann: 6m 12f ( HNHM; I. rivulorum , det. H. Steinmann) ; Zázrivá, Mts Malá Fatra, Zázrivka Stream , 06.07.1967, leg. H. Steinmann: 2m 5f ( HNHM; I. rivulorum , det. H. Steinmann) ; Zuberec, Mts Západné Tatry, Brestová , Studeny Stream , 860 m, 22.07.2003, leg. K. Balogh, I. Béres, D. Murányi, Zs. Szegedi: 2m 3f ( HNHM) ; Važec, Mts Vysoké Tatry , 08.07.1967, leg., det. H. Steinmann: 14m 10f ( HNHM) ; Liptovsky Mikulas, Mts Nízke Tatry , 07.07.1967, leg. H. Steinmann: 1m ( HNHM) ; Demänovská Dolina, Mts Nízke Tatry , 07.07.1967, leg. H. Steinmann: 1m ( HNHM; I. rivulorum , det. H. Steinmann) ; Prešovský region: Vysoké Tatry, Mts Vysoké Tatry , Podbanské , 08.07.1967, leg. H. Steinmann: 1m ( HNHM; I. rivulorum , det. H. Steinmann) ; Podspády, Mts Belianske Tatry, Javorinka Stream , 11.07.1967, leg. H. steinmann: 1m ( HNHM) ; Lendak, Mts Belianske Tatry, Tatranská Kotlina , 11.07.1967, leg. H. Steinmann: 7m 2f ( HNHM; I. rivulorum , det. H. Steinmann) ; Spišská Belá, Beliansky Stream , 11.07.1967, leg. H. Steinmann: 18m 16f ( HNHM; I. rivulorum , det. H. Steinmann) ; Banskobystrický region: Donovaly, Mts Nízke Tatry , 09.07.1967, leg. H. Steinmann: 2m 3f ( HNHM; I. rivulorum , det. H. Steinmann) ; Stará Huta, Mts Javorie, Blýskavica , Tisovník Stream , 660 m, 10.07.2004, leg. K. Balogh, K. Harmos, D. Murányi: 1m ( HNHM) ; Povojné, Mts Javorie, Tisovník Stream , 480 m, 11.07.2004, leg. K. Balogh, K. Harmos, D. Murányi: 6m 7f ( HNHM; eggs prepared for SEM) ; 20.06.2006, leg. Á. Garai, J. Kontschán, D. Murányi: 2m ( HNHM; one male terminalia prepared for SEM) ; Príboj, Mts Krupinská Planina, Tisovník Stream , 260 m, 11.07.2004, leg. K. Balogh, K. Harmos, D. Murányi: 1f ( HNHM) ; Košický region: Hrabušice, Mts Slovenský Raj , Kláštorisko , 10.07.1967, leg. H. Steinmann: 1m ( HNHM) ; Stratená, Mts Slovenský Raj , 10.07.1967, leg. H. Steinmann: 1m 1f ( HNHM; I. rivulorum , det. H. Steinmann) ; HUNGARY: Borsod-Abaúj-Zemplén county: Kishuta, Mts Zemplén, Kőkapu , 19.05.1966, leg. H. Steinmann: 3m ( HNHM) ; Kemence Stream , 230 m, 08.06.2006, leg. Cs. Csuzdi, E. Horváth, D. Murányi: 1m 2f ( HNHM) ; ROMANIA: Cluj county: Cluj-Napoca, SomeŞul Mic River , 19.05.1971, leg., det. B. Kis: 12m 9f ( HNHM) ; Bacău county: CaŞin, Salutaris, 800m, leg Fodor , Z. Kaszab : 1m 1f ( HNHM) ; Poiana Sărată, Mts Nemira , 18.06.1971, leg. B. Kis: 1m 2f ( HNHM) .

Diagnosis. This species is characterized by an oblong medial penial armature of, the sides of which are folded but lack lateral expansions. The scales of this armature are triangular, their length being 2.5x their width. Lateral penial armatures lacking.

Complementary description: General appearence, dimensions, male and female abdomen: Similar to I. oxylepis balcanica redescribed below, and see also the literature cited above ( Despax 1936, Illies 1952b, Winkler 1957, Kis 1974).

Penis: Divided into four lobes, plus a basal section in everted position ( Fig. 7). The medial penial armature is located on the medial lobe adjacent to the ventral lobe, lateral penial armatures lacking. The medial penial armature is oval, lateral sides folded; length 160–210 µm, width 90–120 µm ( Fig. 11). The scales are triangular and erect, cross section cylindrical; their length is 30–45 µm, width 12–18 µm. Lobes and the distribution of colorless scales similar to I. oxylepis balcanica , but the ventral lobe bears no strong triangular scales and the stripe of spike-like scales on the medial lobe is less extended.

Egg: Similar to I. oxylepis balcanica , but the chorion with more pronounced follicular cell impressions (FCIs) in the studied eggs ( Fig. 17).

Larva not studied herein (see Illies 1952b, Raušer 1980).

Affinities: See I. oxylepis balcanica below.

Ecology and distribution: The species was originally described from the French Massif Central ( Kimmins 1970). Later it was reported from most of Central Europe ( Fochetti 2004), and from Slovenia, Croatia, Bosnia-Her-

zegovina, Serbia and Montenegro in the Northern parts of the Balkans ( Sivec 1980a). In the Central Balkans it is replaced by I. oxylepis balcanica . The studied material was collected from May to July from various, but usually larger streams occuring in hilly or submontane regions, together with a diverse community of stoneflies.