Stenobothrus eurasius eurasius Zubovski, 1898

Şirin, Deniz, Mol, Abbas, Taylan, Mehmet Saýt, Demýr, Eyüp & Kizilocak, Dýlan Hevra, 2017, The Gomphocerinae Tarbinsky, 1932 (Orthoptera: Acrididae) fauna of the Turkish Thrace, Zootaxa 4299 (3), pp. 361-383 : 370-371

Stenobothrus eurasius eurasius Zubovski, 1898

Stenobothrus eurasius Zubovski, 1898 : 3,75.

Distribution in the Palaearctic region: Austria, Czech Republic, Greece, Moldavia, Hungary, Romania, Russia, Slovakia, Ukrania, and East Palearctic ( Harz 1975; Gavlas 2005; Berger 2008)

Distribution in the Turkish Thrace: First record for the study area and Turkey.

Material examined: KIRKLARELİ: Between Demirköy-Pınarhisar , 314m a.s.l., N: 41°38.982’ E: 27°36.253’, 31.VII.2013, 2 ♂♂, 2 ♀♀, leg.: D. Şirin & E. Bayram; Demirköy, between Poyralı-İslambeyli, 350m a.s.l., N: 41°38.570’ E: 27°36.181’, 24.VI.2015, 4 ♂♂, 3 ♀♀, leg.: D. Şirin, S. Kar, G. Akyıldız ( Fig. 10 A). Calling song recorded from two males at 27 ˚C in the laboratory conditions by D. Şirin.

Description of song: Stenobothrus eurasius eurasius can produce a very complex song pattern, especially in the courtship song. The calling song of this species consists of an unusually long phrase (32–57s). The beginning of phrase includes an irregular pattern as a noisy part in low amplitude ( Fig. 10 B) or several discontinuous parts. A phrase includes regular syllables (except several syllables at the beginning and end of the phrase) and the duration of the syllables range between 516 and 613 ms Syllables consists of two obvious parts ( Fig. 10 C). First part contains sharpen pulses in continuous crescendo from beginning to middle and decrescendo from middle to its ends ( Fig. 10 D). Second part of the syllable contains a few pulses group with a similar amplitude modulation ( Fig. 10 D).

The number of these group ranges from 2 to 6 in this part. Although the numbers of pulse groups in the second part of the syllables are up to six, there are mostly two long pulse groups and several versions of it separated by gaps ( Fig. 10 C–D).

Published song data, used for comparison: Berger 2008.

Figures

FIGURE 10. The distribution of Stenobothrus eurasius eurasius population in Turkish Thrace Region (A) and male calling song oscillograms at three different time scales (B, C and D).