Eugaster guyoni (Serville, 1838)

Material examined: 1 male, CH 0656 (SF), MOROCCO, 20 km W of Midelt P 3426 (32°45’N, 4°54’W), 1–31 viii 1985, leg. M. Gebhardt ( guyoni nigripes); 1 male (SR), MOROCCO, S of Taroudant, ruderal stony desert and bush, p.1179, N 30.53051, W 008.4142, 600 m, 29.03.2019, leg. Chobanov ( guyoni berlandi); 1 male (SR), MOROCCO, Tamaloukht, N 30.60269, W 008.83921, 420 m, 10.06.2013, leg. Chobanov ( guyoni berlandi); 1 male (SR), MOROCCO, 20 km E of Tiznit, ruderal scrub vegetation near the road, p.030, N 29.69291, W 009.52822, 210 m, 24.05.2013, leg. Chobanov ( guyoni berlandi); 1 male (SR), MOROCCO, NE of Tantan, deviation to Tideguit, cactus-plantation ( Opuntia), N 28.56885, W 010.82870, 174 m, 24.05.2013, leg. Chobanov ( guyoni fernandezi); 1 male (SR), MOROCCO, 5 km NE of Taliouine, stony desert and canyon, p.1180, N 30.56452, W 007.95019, 1140 m, 29.03.2019, leg. Chobanov ( guyoni intermedia); 2 males (SR), MOROCCO, SE of Talouine, barley plantation, N 30.47001, W 007.84247, 1470 m, 26.05.2013, leg. Chobanov ( guyoni intermedia).

References: Grzeschik 1969, Nielsen 1971, 1974, Schmidt et al. 1997.

Bioacoustics. The tegmina (Fig. 2B) are in shape typical for Hetrodini, but show even less remainings of veins and cells than the other studied genera (compare Fig. 2, 3). For other data see below, Eugaster spinulosa .

Genitalia. Despite careful examination, we could not find a titillator or other sclerotized genitalic elements. Already Grzeschik (1969, p. 91) writes “like all Tettigoniidae Eugaster does not have a penis“ (translated from German).

Chromosomes: 2n = 29 (28 + X0), FN = 29; pairs 1–14 and the X chromosome acrocentric [2 males described earlier (Grzywacz et al. 2015): Morocco, Tamaloukht, 10.06.2013, leg. Chobanov (cf. berlandi) and 20 km E of Tiznit, 24.05.2013, leg. Chobanov (cf. berlandi/fernandezi)]; thin paracentromeric C-bands in all chromosomes.