Eugasteroides loricatus ( Gerstaecker, 1869 )

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 : 473

Eugasteroides loricatus ( Gerstaecker, 1869)

Material examined: 2 males [CH7352 (SR, SF), CH 7353 (SF)], TANZANIA, Northern part, Lake Chala, Mt Kilimanjaro, Kilimanjaro Region, September 2010, leg. C. Hemp ; 1 male (SR), TANZANIA, Longido , Arusha Region, Oktober 2010, leg. C. Hemp (all nominate subspecies).

References: Grzeschik 1969, Hemp 2021 (all to nominate subspecies).

Bioacoustics. Tegmina ( Fig. 3 ) and the spectrum of the song ( Fig. 6 ) do not show large differences to the typical Hetrodini pattern. However, the stridulatory file ( Fig. 4C ) shows a slight elevation in the middle, not seen in other Hetrodini species. The calling song consists of a long, uninterrupted trill (song type A) with a SRR of about 44 Hz ( Fig. 10C ; see Table 2 ).

Genitalia. As in Eugaster , we could not find a titillator or other sclerotized genitalic elements despite careful examination.

Chromosomes: 2n = 29 (28 + X0), FN = 29; pairs 1–14 and X chromosome acrocentric [2 males described earlier ( Grzywacz et al. 2015: CH 7352, CH 7353)]; thin paracentromeric C-bands in all chromosomes .

Figures

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.

FIGURE 4. Stridulatory files on the underside of the left tegmen (wing articulation at the right) of A Acanthoplus discoidalis (CH8946), B Cosmoderus femoralis (CH8627), C Eugasteroides loricatus (CH7352), D Spalacomimus talpa (CH7354). Scale 1 mm.

FIGURE 6. Power spectra of male calling songs in Hetrodini species

FIGURE 10. Oscillograms of the calling songs in the genera Eugaster, Eugasteroides and Spalacomimus (figures of S. liberianus based on figures and data from literature; see text). A Eugaster guyoni, B Eugaster spinulosa, C Eugasteroides loricatus, D Spalacomimus liberianus, E Spalacomimus magnus, F Spalacomimus stettinensis, G Spalacomimus talpa, H Spalacomimus verruciferus, I Spalacomimus spec. near verruciferus.