Isophya andreevae

Dragan P. Chobanov, Beata Grzywacz, Ionuţ Ş. Iorgu, Battal Cιplak, Maya B. Ilieva & Elżbieta Warchałowska-Śliwa, 2013, Review of the Balkan Isophya (Orthoptera: Phaneropteridae) with particular emphasis on the Isophya modesta group and remarks on the systematics of the genus based on morphological and acoustic data, Zootaxa 3658 (1), pp. 1-81 : 22

3.3. Complex Isophya andreevae

Here we regard two species with similar morphology, bioacoustics and karyology with neighbouring ranges (for references see below)— I. andreevae and I. tosevski , that are distributed in a limited area along the middle and lower course of the Strouma and Vardar rivers and the surrounding mountain slopes (Central Balkans). Both taxa can be recognised by the shape of male cercus apex, male tegmina and partly by male song. However, the molecular data (Grzywacz-Gibała et al. 2010; own unpublished data) showed significant genetic distances between both species and between I. tosevski and the other taxa of the I. modesta group (see Grzywacz-Gibała et al. 2010: Table 3a, 3b, Fig. 7 ), which makes it a unique example of genetic differentiation within this group.

Both taxa may be characterised by the following characters: Massive species. The ventral keels of hind femora have at least one spine. CuP is wide and about 2/3 to>3/4 of the width of metazone in length. Dorsal part of tegmina (at least in lowland populations) is yellowish coloured with brown stridulatory area. The stridulatory file has 77–110 teeth. The cercal spine is long and pointed but much more massive than those of I. bureschi . The song consists of groups of 3–6 or, sometimes, of single syllables with clearly separated impulses. Sometimes the syllable is followed by an after-click or a group of after-clicks (up to eight) following at about 200 ms.

Figures

FIGURES 1 – 18. General appearance of some Balkan Isophya. 1, 2 — I. hospodar (1 — male, 2 — female); 3 — I. thracica (male); 4, 5 — I. rectipennis (4 — male, 5 — female); 6, 7 — I. pavelii (6 — male, 7 — female); 8, 9 — I. bureschi (8 — male, 9 — female); 10, 11 — I. andreevae (10 — male, 11 — female); 12, 13 — I. plevnensis (12 — male, 13 — female); 14, 15 — I. m. modesta (= intermedia) (14 — male, 15 — female); 16 — I. l. longicaudata (male); 17 — I. rhodopensis leonorae (male); 18 — I. rh. petkovi (male) (Figures 6 – 11, 17, 18 — photo M. Langourov).