Xenogryllus, Bolivar, 1890

Jaiswara, Ranjana, Dong, Jiajia, Ma, Libin, Yin, Haisheng & Robillard, Tony, 2019, Taxonomic revision of the genus Xenogryllus Bolívar, 1890 (Orthoptera, Gryllidae, Eneopterinae, Xenogryllini), Zootaxa 4545 (3), pp. 301-338 : 306

Key to species of Xenogryllus

1. Dorsal disc of pronotum carinated laterally. Eyes higher than long in lateral view, occupying half of head height.......... 2

- Dorsal disc of pronotum not carinated laterally. Eyes as long as high in lateral view, restricted to dorsal third of head....... 4

2. Face almost flat in lateral view................................................... X. eneopteroides Bolívar, 1890

- Face rounded in lateral view............................................................................. 3

3. Face bulbous in lateral view. Size rather larger. Male genitalia: Pseudepiphallic lophi ( Fig. 8F ) ended by a small lamella, their inner margin almost straight, membranous.......................................... X. mozambicus Robillard n. sp.

- Face less rounded in lateral view. Size rather shorter. Male genitalia: Pseudepiphallic lophi ( Fig. 8E ) ended by a long conical apex and with a widened inner membranous margin........................... X. maniema Robillard & Jaiswara n. sp.

4. Male FWs well widened basally, forming a wide box around abdomen........................................... 5

- Male FWs not widened, as wide as abdomen........................................... X. lamottei Robillard n. sp.

5. Size larger (body length> 20 mm). Male genitalia: pseudepiphallic lophi strong, ended by a sharp apex with a dorsal preapical pointed expansion. Female subgenital plate posterior margin clearly indented...................................... 6

- Size smaller (body length <20 mm). Male genitalia: pseudepiphallic lophi very long and thin, ended by a lamella, without dorsal preapical pointed expansion. Female subgenital plate posterior margin not indented ( Fig. 9B )...................................................................................................... X. marmoratus ( Haan, 1844)

6. Male genitalia: Pseudepiphallic lophi with pseudepiphallic lophi forming curved elongate hooks widened apically ( Fig. 8D ). Female subgenital plate posterior margin indentation rounded laterally, as wide as long ( Fig. 9C )................................................................................................. X. maichauensis Gorochov, 1992

- Male genitalia: Pseudepiphallic lophi straight apically. Female subgenital plate posterior margin indentation pointed laterally..................................................................................................... 7

7. Size larger. Male genitalia with larger pseudepiphallic sclerite; lophi proportionally smaller ( Fig. 8I ), fused only basally, separated by a deep indentation. Female subgenital plate posterior margin indentation very deep, longer than wide ( Fig. 9G ).................................................................................. X. transversus ( Walker, 1869)

- Size smaller. Male genitalia with smaller pseudepiphallic sclerite; lophi fused on half of their length ( Fig. 8H ). Female subgenital plate posterior margin indentation weak, wider than long ( Fig. 9E )......................... X. ululiu Gorochov, 1990

Figures

FIGURE 8. Right pseudepiphallic lophi of male genitalia in dorsal view: (A–B) Xenogryllus eneopteroides, male from Central African Republic (A), male from Ivory Coast (B); (C) Xenogryllus lamottei n. sp.; (D) Xenogryllus maichauensis; (E) Xenogryllus maniema n. sp.; (F) Xenogryllus mozambicus n. sp.; (G) Xenogryllus marmoratus; (H) Xenogryllus ululiu; (I) Xenogryllus transversus. Symbols: Preapical hook-like expansion figured in gray or with a black arrow; dotted parts represent membranous areas; thin lines represent folds and reliefs in sclerites. Scale bar: 1 mm.

FIGURE 9. Apex of female subgenital plate and base of ovipositor in ventral view: (A) Xenogryllus eneopteroides; (B) Xenogryllus marmoratus; (C) Xenogryllus maichauensis; (D) Xenogryllus mozambicus; (E) Xenogryllus transversus; (F) Xenogryllus ululiu. Scale bar: 1 mm.