Gymnogryllus extrarius

Ma, Libin & Zhang, Yalin, 2011, The cricket genus Gymnogryllus (Grylloidea: Gryllidae: Gryllinae: Gryllini) from China with description of six new species, Zootaxa 2733, pp. 31-40 : 33-37

Gymnogryllus extrarius nov. sp.

(Fig. A. 2; B. 2, 8; C. 2; D. 2)

Type material. Holotype male, China: Yunnan, Xishuangbanna, Mengla, 23~ 27 Jul. 1995, coll. Xianwei Liu, Weinian Zhang and Xinbao Jin (SEM).

FIGURES A, 1–6. Body (male) in dorsal view: 1. G. dolichodens nov. sp.; 2. G. extrarius nov. sp.; 3. G. yunnanensis nov. sp.; 4. G. s t r i a t u s nov. sp.; 5. G. longus nov. sp.; 6. G. tumidulus nov. sp. . 7–9. G. dolichodens nov. sp. (female): 7. Body in dorsal view; 8. Occiput in lateral view; 9. Occiput in ventral view.

FIGURES B, 1–6. Head in front view: 1. G. dolichodens nov. sp.; 2. G. extrarius nov. sp.; 3. G. yunnanensis nov. sp.; 4. G. striatus nov. sp.; 5. G. longus nov. sp.; 6. G. tumidulus nov. sp. . 7–12. Tegmen: 1. G. Dolichodens nov. sp.; 2. G. extrarius nov. sp.; 3. G. yunnanensis nov. sp.; 4. G. s t r i a t u s nov. sp.; 5. G. longus nov. sp.; 6. G. tumidulus nov. sp. .

FIGURES C, 1–6. Genitalia, a. in front view; b. in lateral view; c. in dorsal view: 1. G. dolichodens nov. sp.; 2. G. extrarius nov. sp.; 3. G. yunnanensis nov. sp.; 4. G. striatus nov. sp.; 5. G. longus nov. sp.; 6. G. tumidulus nov. sp. .

FIGURES D, 1–6. Stridulatory file, a. whole illustration for file; b. media part of file; c. the inside part of file: 1. G. dolichodens nov. sp.; 2. G. extrarius nov. sp.; 3. G. yunnanensis nov. sp.; 4. G. striatus nov. sp.; 5. G. longus nov. sp.; 6. G. tumidulus nov. sp. .

Diagnosis. Male. Frons normal. Epistomal suture narrow and straight. Distal edge of labrum rounded. Lateral ocelli rounded and slightly convex. Occiput somewhat narrower than anterior pronotum. Pronotum slightly narrowed in front. Oblique veins three, the outermost vein at the corner of stridulatory vein. Inner side of mirror hardly bent (bending on covered tegmen). The crossvein between the chord and mirror reaches to below the inside corner of mirror. Inner branches of Cu1 at apical field nine (branches eight, under the seventh irregular, on covered tegmen). Forewings do not reach apex of abdomen. Stridulatory file inside apex almost connect to hairs, with 54 anvillike teeth and three irregular angular teeth inside. Hindwings long, reaching just beyond the tip of cercus. Genitalia: Median notch between paired lower apical teeth not reaching dorsal edge of epiphallic apex, and an outward oblique section above it; paired lower apical teeth strong and pointed outward in lateral view.

Coloration. Head and pronotum rufous to dark brown. Hind femur dark brown and FWs light brown. Occiput rufous with wide black stripe. Cheek with 1/3 brown part at bottom. Frons uniform colored. Crescent pattern of pronotum colored rufous inside and around with black color. 1/4 part of lateral lobe bottom with an indistinct light stripe. Subapex of hind femur with brown patch dorsally.

Measurements. BL 29; HW 6.5; PL 5; PW 8.5; FWL 19.5; FWW 8.5; AFL 9; HWL 9; HLL 15.5; CL 8; API 1.06; PI 1.70; NST 57; SFL 4.39; DST 12.

Etymology. The specific epithet “ extrarius ” refers to the paired lower apical teeth being strong and pointed outward in lateral view.