Agryllus apterus He, 2018

Xu, Yue, Gao, Xue-Di, Liu, Yun-Fei & He, Zhu-Qing, 2018, A new species of genus Agryllus Gorochov, 1994 from Yunnan, China (Orthoptera: Gryllidae: Gryllinae), Zootaxa 4497 (3), pp. 447-450 : 448-449

Agryllus apterus He sp. nov. ( Fig. 3 )

Holotype. male, CHINA, Yunnan, Dehong, Yingjiang, Nabang 24-iv-2018, coll. He Zhu-Qing ( ECNU). Paratypes: 2 males & 2 females, same data as holotype ( ECNU).

Description. Male ( Fig. 3A ). Body medium-sized for Gryllinae . Head: frontal rostrum as wide as the 1 st antennal joint, median ocellus smaller than lateral ocelli and located litter lower than lateral ocelli, maxillary palpi normal with 3rd -5th joints long; thorax: pronotum almost square in disc and as wide as head, anterior and posterior margin almost straight with bristles, rounded borders between disc and lateral lobes, no tympanum, no wing, 4-5 pairs of dorsal spines on hind tibiae, length of the first tarsal segment as long as the second and the third tarsal segment in fore- and mid-leg, length of the first tarsal segment two times as long as long as the second and the third tarsal segment in hind-leg; abdomen: normal and pubescent. Genitalia: anterior lobes of epiphallus curved upwards, posterior epiphallic lobes with setae on ventral surface of inner sides and larger than post lobes of endoparameres, mesal lobes of ectoparameres strong, rami short and without clear medial projections ( Fig. 3 C-E).

Female. ( Fig. 3B ) Similar to male, abdomen larger than male abdomen, ovipositor elongate and straight.

Coloration. Entirely black except for the following: tibiae reddish brown, joint between tibiae and femur reddish brown, ovipositor reddish brown, tarsus brown to black.

Measurements (in mm): male: body length 10.96-12.40, pronotum length 2.94-3.10, hind femur length 8.18-8.82; female: body length 13.03-13.34, pronotum length 3.11-3.30, hind femur length 9.17-9.98, ovipositor length 10.48- 10.65.

Etymology. Species name apterus referring to the wingless condition of both sexes.

Biology. Copulation was observed in lab. The male vibrates body forward and backward after antenna touches the female. Female remains immobile. After several minutes, male produces relatively large spermatophore. After about 5 minutes, male moves underneath the female's body, and transfers the spermatophore.

Distribution. China (Yunnan)

Discussion. The new species is similar to A. magnigenitalis , but is wingless.

Figures

FIGURE 3. Agryllus apterus sp. nov. A—male; B—female; C—genitalia in dorsal view; D—genitalia in ventral view; E—genitalia in lateral view.