Duolandrevus (Duolandrevus) bannanus, Zhang, Dong-Xiao, Liu, Hao-Yu & Shi, Fu-Ming, 2017

Zhang, Dong-Xiao, Liu, Hao-Yu & Shi, Fu-Ming, 2017, First record of the subgenus Duolandrevus (Duolandrevus) (Orthoptera: Gryllidae: Landrevinae) from China, with description of a new species, Zootaxa 4254 (5), pp. 589-592 : 590-591

Duolandrevus (Duolandrevus) bannanus sp. nov. ( Figs. 2–7 )

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:496078

Description. Male. Body medium, head short and slightly wider than pronotum ( Fig. 2 ). Occiput somewhat convex, dorsal area of frontal rostrum flattened. Lateral ocelli rounded, located at side of frontal rostrum; median ocellus halfmoon-shaped, located at midpoint of frontal rostrum top. Frontal rostrum almost equal to the width of antennal scape. Eyes medium size, oval. Apical joint of maxillary palpi longer than the third, depressed and slightly widened. Apical joint of labial palpi longer than second, with rounded apex. Pronotum obviously transverse, middle of anterior margin slightly concave downward, almost equal to the width of posterior margin, posterior margin straight; midpoint of pronotum with a longitudinal concave, anterior margin of pronotum with more pubescent; lateral lobes trapezoidal, posterior margin slightly inclined, equipped with a ridge along margin; metanotal gland developed ( Fig. 3 ), anterior margin of glandular fossa straight, obviously widened backward, with thick pubescent. Tegmen reaching 7th abdominal tergite, length about 1.4 times as long as width, with 5 oblique veins; mirror irregularly oblong, without dividing vein; apical area short, with irregular veins; lateral area with 6 oblique longitudinal veins. Wing short, almost reaching posterior margin of metanotal gland. Both inner and outer tympana present on fore tibia, oval-like, almost equal in size; hind tibia armed with small spines on the basal half portion and with 4 long spines respectively on both sides at the apical half portion.

Supra anal plate, broad at base, posterior margin rounded ( Fig. 4 ). Subgenital plate triangular; posterior narrowly, apical area arc-like. Genitalia ( Figs. 5-7 ): epiphallus equipped widened, with pair of very small median lobes; lateral lobes developed, obviously narrowed to terminal, and slightly curved upward; epiphallic parameres obviously shorter than lateral lobes of epiphallus.

Coloration. Body medium brown to dark brown, head and pronotum slightly darker. Tegmina pale brown, basal and apical portions respectively with a dark brown spot.

Female. Unknown.

Measurements (mm). Male: body 22.0, pronotum 2.9, tegmen 9.1, hind femur 11.9.

Type material. Holotype. ♂, China, Yunnan, Xishuangbanna , 18. July, 2007, coll. Guo Zheng.

Diagnosis. The new species is similar to D. (D.) thailandicus ( Otte, 1988) , but can be distinguished by anterior margin of metanotal gland narrower posterior margin; epiphallus widened, and apex of lateral lobes different shape; epiphallic parameres obviously short than the latter.

Etymology. This species name is derived from the type locality on Banna (Xishuangbanna for short).

Figures

FIGURES 2 – 4. Duolandrevus (Duolandrevus) bannanus sp. nov.: 2. body, dorsal view; 3. metanotal gland, dorsal view; 4. supra anal plate, dorsal view.

FIGURES 5 – 7. Duolandrevus (Duolandrevus) bannanus sp. nov.: genitalia (5. dorsal view; 6. ventral view; 7. latral view)