Homoeogryllus xanthographus ( Guerin-Meneville , 1847)

Zurawlew, Przemyslaw, Desutter-Grandcolas, Laure, Szymanski, Pawel & Herman, David Billy, 2020, New records of exotic crickets in Europe: Homoeogryllus species (Orthoptera: Gryllidea: Phalangopsidae), Journal of Orthoptera Research 29 (2), pp. 121-125 : 121-122

Homoeogryllus xanthographus ( Guerin-Meneville, 1847) Figs 5 , 6

Observed material.-

Poland, Gołuchów, Pleszew District, 20 I-10 III 2009, 1♂, A. Biernat leg., S. W. Heads det. (see Żurawlew 2009).

Remark.-

The male was found in a wicker basket with potted plants inside a residential building. It had probably been transported, as an egg or a nymph, with the coconut bedding into which the plants were potted.

Stridulation description .-Recorded stridulations (n = 9) consisted of 4 to 9 elements (Fig. 6a ). Two types of elements could be distinguished: shorter creaks repeated 3 to 8 times and a longer, terminating creak (Fig. 6c ). One series had two terminating elements (Fig. 2b ). The fundamental frequency of stridulation was around 4 kHz.

Figures

Figure 2. Stridulation of Homoeogryllus cf. reticulatus (Fabricius, 1781) male from Gent (Belgium): a. spectrogram of two recorded stridulation series; b. spectrogram of one stridulation series in higher resolution of time domain; c. spectrogram of the beginning of stridulation series with three units (syllables) shown. The oscillograms are shown below and the relative amplitude scales (in dB) on the right of the spectrograms. Abbreviations: dB, decibel; s, second; kHz, kilohertz.

Figure 5. Homoeogryllus xanthographus (Guerin-Meneville, 1847) male observed in Goluchow, Pleszew District (Poland).

Figure 6. Stridulation of Homoeogryllus xanthographus (Guerin-Meneville, 1847), male observed in Goluchow, Pleszew District (Poland): a. spectrogram of recorded stridulation series; b. spectrogram of one stridulation series in higher resolution of time domain; c. spectrogram of two type units (syllables). The oscillograms are shown below and the relative amplitude scales (in dB) on the right of the spectrograms. Abbreviations: dB, decibel; s, second; kHz, kilohertz.