Sonotrella (Sonotrella) laosensis, Liu, Hao-Yu, Zhang, Dong-Xiao & Shi, Fu-Ming, 2016

Liu, Hao-Yu, Zhang, Dong-Xiao & Shi, Fu-Ming, 2016, First record of Sonotrella Gorochov (Orthoptera: Gryllidae) from Laos, with description of a new species, Zootaxa 4114 (2), pp. 189-194 : 191-193

Sonotrella (Sonotrella) laosensis sp. nov.

Figs. 1–7

http://lsid.speciesfile.org/urn:lsid:Orthoptera.speciesfile.org:TaxonName:477714 Description. Male ( Fig. 1 ). Body slightly large-sized; surface finely pubescent. Width of head subequal with anterior margin of pronotum; eyes protruding anteriorly and nearly rounded. Median ocellus small and transversely ovoid; lateral ocelli large and rounded. Frontal rostrum slightly wider than scapus (9: 8), and distinctly flat on dorsal area; apical joint of maxillary palpus longer than 4th joint and subequal length of 3rd joint, distinctly widened apicad. Pronotum widened posteriorly, anterior margin straight, posterior margin slightly protuberant in middle, lateral margins angularly rounded bent into paranota; lateral lobes semicircular. Metanotal gland developed and slightly long, four internal angles round; bottom of gland large and without any structure in middle; posterior margin of bottom regularly covered with area of hairs ( Fig. 2 ). Tegmina distinctly extending over apex of abdomen, with 2 long and 2 short oblique veins; mirror slightly longer than wide (11: 10); apical area very long, with regular veins; lateral area with 16 oblique subcostal veinlets. Fore tibia slightly swollen at tympana; internal tympanum with a wider slit-like opening on posterior side; external tympanum ovoid and free.

Supra anal plate distinctly wider than long, with rounded posterior margin; setae area of dorsal surface semicircular; posterior portion of dorsal surface with membranous rounded concavity in middle ( Fig. 3 ). Subgenital plate strongly swollen at base, distinctly narrowed posteriorly. Phallus developed ( Figs. 4–7 ): epiphallus V-shaped in dorsal view; medial lobes of epiphallus rather long and acute at apex; lateral lobes of epiphallus strongly and curved upwards, reaching apex of lateral lobes, with some denticulations along outer margins; ecotophallus large, with 3 or 4 larger spines on each side; epiphallus parameres sclerotized, short than length of ecotophallus; endophallus short, with triangularly emarginated in the middle of apex.

Coloration. Body brown. Head with four thin median longitudinal dark brown stripes on vertex, and with one distinctly yellow longitudinal stripe behind eyes. Disc of pronotum darkened at lateral area, light in between; paranota yellow. Tegmina with yellow outer margins, other part light brown to brown. Hind knees blackish brown. Abdominal tergites VI-X each with a semicircular yellow marking at dorsal area ( Fig. 3 ).

Female. Unknown.

Measurements (mm). Male: body 33.0, length with wings 36.5, pronotum 5.0, tegmen 30.5, hind femur 21.0.

Type material. Holotype ♂, Laos, Phou Khao Khouay National Bio-Diversity Conservation Area (N: 18°12.834′, E: 102°59.981′), 160m, in broad-leaved forest ( Fig. 8 ), 29. VI. 2015, coll. Hao-Yu Liu.

Diagnosis. This new species is related to S. (Sonotrella) major Liu, Yin & Wang,1993 , but can be distinguished by the tegmina with 4 oblique veins; supra anal with different shape at setae area, posterior margin round in the middle; ecotophallus large, with 3 or 4 larger spines on each side.

Etymology. The specific name is derived from type locality Laos.

Figures

FIGURE 8. Habitat photo, by Dr. Wen-Liang Li.

FIGURES 1 – 3. Sonotrella (Sonotrella) laosensis sp. nov., dorsal view: 1. habitus; 2. metanotal gland; 3. abdominal tergites VI-X and supra anal plate.

FIGURES 4 – 7. Sonotrella (Sonotrella) laosensis sp. nov.: 4 – 6. phallus (4. dorsal view; 5. ventral view; 6. lateral view); 7. epiphallus parameres (lateral view).