Eugaster guyoni ( Serville, 1838 )

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 : 472

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.

Figures

FIGURE 2. Left and right male tegmina of A Cosmoderus femoralis (CH8627), B Enyaliopsis bloyeti (CH8853), C Eugaster guyoni (CH0656), D Spalacomimus spec. near verruciferus (CH7898). Scale 5 mm.

FIGURE 3. Left male tegmina of Acanthoplus discoidalis (CH8946), Acanthoproctus cervinus (CH8947), Hetrodes pupus (CHelb8948), Enyaliopsis bloyeti (CH8853), E. carolinus (CH8625), E. ephippiatus (CH7737), E. jennae (damaged; CH8267), Gymnoproctus rammei (CH8763), Eugasteroides loricatus (CH7352), Spalacomimus stettinenesis, S. talpa (CH7354), S. verruciferus (CH7188). Scale 5 mm.