Cyanidius turkestanicus, Dubovsky, 1966

Tishechkin, D. Yu., 2024, New data on the male calling signals of Palearctic Deltocephalinae (Homoptera: Cicadellidae), Russian Entomological Journal 33 (1), pp. 9-21 : 11

5. C. turkestanicus Dubovsky, 1966

Figs 21–26 .

MATERIAL. 1. Kyrgyzstan, Western Tien-Shan Mts. , the bank of the Kara-Suu River ca 3.5 km from its confluence with the Naryn River (about 10 km north of Tash-Kumyr Town), from Artemisia subg. Seriphidium , 6.VII.2009, signals of two males recorded at 30–31 °C .

2. Kyrgyzstan, Western Tien-Shan Mts. , semidesert in the hills about 12 km west of Tash-Kumyr Town, 41.301° N, 72.056° E, from Artemisia subg. Seriphidium , 9.VII.2023, signals of one male recorded at 31 °C .

SIGNALS. The temporal pattern of the male calling signal is generally the same as in C. collinus . The phrase consists of alternating sequences of 3–6 shorter syllables and one longer syllable, and always begins with a sequence of shorter syllables ( Figs 21–23 ). Before the last longer syllable this sequence can be missing. The phrase duration is 9–10 s in males from the first locality ( Figs 21–22 ) and about 4.5 s in the male from the second locality ( Fig. 23 ). The duration of both longer and shorter syllables in males from different localities is almost the same and averages 1200–2200 ms and 95–140 ms, respectively. Sometimes the longer syllable begins with several pulses of higher amplitude ( Figs 23, 26 ; the second long syllable on Fig. 22 ); at the end of some syllables, the pulse repetition period sharply decreases and their shape somewhat changes ( Figs 25–26 ).

Signals of males from different localities clearly differ in duration, despite the fact that the distance between them is about 23 km and the recordings were made at almost the same temperature.

REMARKS. The type locality of this species (environs of Dzhany-Dzhol Village ) is situated ca 15 km north-northwest of the first recording site and ca 32 km north-northeast of the second recording site [Dubovsky, 1966].

Figures

Figs 16–28. Oscillograms of male calling signals of Deltocephalinae. 16–20 — Cyanidius collinus; 21–26 — C. turkestanicus; 27–28 — Euscelidius mundus. Faster oscillograms of the parts of signals indicated as “18–20”, “24–26” and “28” are given under the same numbers. Рис. 16–28. Осциллограммы приЗывных сигналов самцов Deltocephalinae. 16–20 — Cyanidius collinus; 21–26 — C. turkestanicus; 27– 28 — Euscelidius mundus. Фрагменты сигналов, помеченные цифрами “18–20”, “24–26”, и “28”, представлены при большей скорости раЗвёртки на осциллограммах под соответствующими номерами.