Cosmoderus femoralis Sjöstedt, 1901

Heller, Klaus-Gerhard, Chobanov, Dragan, Warchałowska-Śliwa, Elżbieta & Hemp, Claudia, 2022, Review of song patterns and sound production in armoured ground crickets (Orthoptera: Tettigoniidae: Hetrodini) with karyological data and taxonomic notes, Zootaxa 5120 (4), pp. 451-481 : 464

publication ID	https://doi.org/ 10.11646/zootaxa.5120.4.1
publication LSID	lsid:zoobank.org:pub:B6FBF44E-78CB-4ACA-9F58-1174A9E59926
DOI	https://doi.org/10.5281/zenodo.6401847
persistent identifier	https://treatment.plazi.org/id/DF5687C2-FFFB-4175-CAD1-EF7AFDE020B0
treatment provided by	Plazi
scientific name	Cosmoderus femoralis Sjöstedt, 1901
status

Treatment

Cosmoderus femoralis Sjöstedt, 1901 View in CoL

Material examined: 3 males [CH8626 (SR, TI, CHR), CH 8627 (SF, TI, CHR), CH8628 ( CHR)], CAMEROON, 2018, obtained alive from P. Grabowitz, Cologne .

Bioacoustics. The tegmina of Cosmoderus femoralis males show the typical Hetrodini shape ( Fig. 2 View FIGURE 2 ). The left file carries 65 relatively small teeth ( Table 1 View TABLE 1 ; Fig. 4 View FIGURE 4 ), much more than in the species described above. The recorded male produced its calling song only at night. In the beginning it made crescendoing series of syllables lasting a few seconds, but these sequences quickly became longer ending in very long trills ( Fig. 5A View FIGURE 5 , 8A View FIGURE 8 ; longest recorded uninterrupted songs 46 and 66 minutes). The spectrum of the song is typical for Hetrodini with the peak at 16 kHz ( Fig. 6 View FIGURE 6 ).

Genitalia. The genitalic sclerites consist of a large, central, triangular, basal part (titillator) with a very short rectangularly-bent tip and two smaller lateral elements ( Fig. 9A View FIGURE 9 ).

Chromosomes: 2n = 25 (24 + X0), FN = 29; pairs 1 and 2 submetacentric (= bi-armed), 3–12 and X chromosome acrocentric (3 males); thin C-positive paracentromeric bands in all of the chromosomes and an interstitial one in the first pair of autosome ( Fig. 12A View FIGURE 12 ).