Tuberfemurus kanokwanae Storozhenko et Dawwrueng

Storozhenko, Sergey Yu. & Dawwrueng, Pattarawich, 2014, Three new species of the subfamily Cladonotinae (Orthoptera: Tetrigidae) from Thailand, Zootaxa 3811 (3), pp. 325-337 : 332-336

Tuberfemurus kanokwanae Storozhenko et Dawwrueng , sp. nov.

Figs. 28–44

Material examined. Holotype—female, Thailand: Saraburi Province, environs of Wat Phrabuddhabat, 50–150 m, 6 July 2013, coll. P. Dawwrueng and P. Panyachai. Paratype: male, same data as in holotype. Holotype and paratype are deposited in the Department of Entomology, Kasetsart University, Bangkok.

Description. Female (holotype). Body robust, small for genus. Antennae filiform, 14-segmented; antennal bases situated between the lower margins of eyes. Length of antennae 1.3 times longer than length of fore femur; mid segments of antennae 3.1–5.4 times as long as wide. Eyes not protruding above vertex in lateral view. Lateral ocelli placed slightly below the middle of eyes. Fastigium of vertex in dorsal aspect reaching the anterior margin of eyes, 1.6 times wider than width of one eye from above; anterior margin of fastigium almost straight, median carina of fastigium reaching the middle of eyes; lateral carinae well defined. Frontal ridge in lateral view broadly rounded with two concavities, one above lateral ocelli and another below antennal sockets. Width of frontal ridge near base of antennae 1.9 times more than width of 1st antennal segment; lateral carinae of frontal ridge incurved. Pronotum short, reaching 2/3 of hind femora; anterior margin of pronotum in dorsal view narrowly triangular and almost reaching the middle of eyes, apex of the posterior process of pronotum in dorsal view truncate with median concavity. Median carina of pronotum strongly elevated, in profile arch-like, in cross-section lamellate. Lateral carinae of pronotum in prozona only traced by few tubercules. Hind margin of lateral lobes of pronotum with lower sinus only; posterior angles of lateral lobes in dorsal view broadly rounded, in lateral view truncate. Tegmina and hind wings absent. Fore and mid femora with upper carinae almost straight and gentle serrated; lower carinae strongly sinuate and distinctly serrate. Fore femur 2.8 times, mid femur 3.2 times as long as wide. Hind femur stout, 2.2 times as long as wide; upper carinae gentle serrated; lower carinae smooth; lower outer keel of hind femora with 3 projections, basal projection short and narrow, mid one long and apical one triangular. Upper side of hind tibia with 7 outer and 5 inner teeth and numerous denticles between them. First tarsal segment of hind legs 1.9 times longer than 3rd segment (without claws). Subgenital plate transverse, 1.2 times as wide as long, with angularly projecting posterior margin. Cerci conical, 1.7 times as long as wide near base, with acutely rounded apex. Valves of ovipositor stout, dentate. Upper valve of ovipositor 3.1 times longer than its maximum width; lower valve of ovipositor 3.3 times longer than its maximum width.

Body grey with gentle velvet black spots. Head from above greenish grey, in frontal view greenish grey with dark marks. Antennae light brown with dark brown apical segments. Dorsal side and lateral lobes of pronotum greenish grey with velvety black, brown and dark grey spots and with large blackish spot behind shoulder. Median carina light brown with numerous velvet black spots around upper margin. Fore and mid femora brownish grey with two transverse black stripes. Fore and mid tibiae blackish brown, with two light rings. First segment of fore and mid tarsi blackish brown, second segment blackish brown with light brown ring near the middle; claws brown. Outer side of hind femora above the lower outer keel light grey with one transverse black stripe near the base and two brown apical spots; below lower outer keel hind femora black; the projections of the lower outer keel whitish yellow. Hind tibiae blackish brown with light brown ring near the base. First segment of hind tarsus brown with blackish base and apex; third segment brown with light brown ring near the middle; claws reddish brown. Abdomen from above, sternites and subgenital plate brownish grey. Ovipositor light brown with dark brown apex.

Male (paratype). Similar to female. Antennae 14-segmented; length of antennae 1.5 times longer than length of fore femur; mid segments of antennae 2.7–4.5 times as long as wide. Fastigium of vertex 1.7 times wider than width of one eye from above; anterior margin of fastigium in dorsal view straight, median carina of fastigium reaching the middle of eyes. Width of frontal ridge near the base of antennae 1.8 times more than width of 1st antennal segment. Pronotum as in female, posterior process reaching epiproct. Tegmina and hind wings absent. Femora as in female, fore femur 2.6 times, mid femur 2.3 times hind femur 2.1 times as long as wide. Upper side of hind tibia with 8 outer and 5 inner teeth and with numerous denticles situated as in female. First tarsal segment of hind legs 1.8 times longer than 3rd segment (without claws). Epiproct narrowly triangular, 1.3 times as long as wide near the base, with pointed apex. Subgenital plate in lateral view trapezoidal with truncate apex; in ventral view apex of subgenital plate deeply and narrowly excised. Cerci 1.7 times as long as wide, widened near the base and narrowed in apical third.

Colored as female, but fore and mid tibiae with three light brown rings. Abdomen from above light greenish grey with black lateral stripes. Sternites dark brown; subgenital plate blackish brown, epiproct light brown; cerci brown.

Measurements (in mm). Length of body (from frontal ridge to apex of subgenital plate) male 6.9, female 7.5; pronotum male 5.1, female 5.5; antenna male 2.0, female 2.0; fore femur male 1.3, female 1.5; mid femur male 1.4, female 1.6; hind femur male 4.2, female 4.5; ovipositor 1.1.

Distribution. Thailand: province Saraburi.

Diagnosis. The new species is easily distinguished from congeners by the distinctly triangular anterior margin of pronotum. In this respect Tuberfemurus kanokwanae sp. nov. is similar to the genus Deltonotus Hancock, 1904 , but undoubtedly belongs to the genus Tuberfemurus due to the median carina of pronotum strongly lamellate in cross-section and by the presence of three projections on the lower outer keel of the hind femora (in Deltonotus the median carina of the pronotum is triangular in cross-section and the lower outer keel of the hind femora lack projections). By its small size and the position of the base of the antennae between the lower margins of eyes, the new species is separated from Tuberfemurus laminatus and T. zhengi (in these species length of pronotum is 7–10 mm and the base of antennae are situated distinctly below the lower margins of eyes). In the above mentioned features, the new species is similar to T. liboensis , but clearly distinguished from the latter by the shape of the pronotum, female subgenital plate, and the ovipositor, and the color of the hind tibiae (in T. liboensis the posterior process of the pronotum is narrowly rounded at the apex, the female subgenital plate is elongated approximately 1.5 times as long as wide, the valves of ovipositor are narrow, and the hind tibiae are black with two light rings, one near the base and another near the middle).

Habitats. The new species was collected in moist areas on stones and between fallen leaves at elevation 50– 150 m.

Etymology. The specific epithet honors Miss Kanokwan Yimyoo, who assisted in the collecting of the pygmy grasshopper specimens.

Figures

FIGURES 28 – 35. Tuberfemurus kanokwanae sp. nov.: 28 — male head and pronotum, lateral view; 29 — male head and pronotum, dorsal view; 30 — female pronotum, lateral view; 31 — male head and pronotum, frontal view; 32 — female fore femur, lateral view; 33 — female mid femur, lateral view; 34 — male hind femur, lateral view; 35 — female hind femur, dorsal view. Scale bars 1 mm.

FIGURES 36 – 41. Tuberfemurus kanokwanae sp. nov.: 36 — male apex of abdomen, lateral view; 37 — the same, dorsal view; 38 — the same, ventral view; 39 — female apex of abdomen, ventral view; 40 — the same, lateral view; 41 — female hind tarsus, lateral view. Scale bars 1 mm.

FIGURES 42 – 44. Tuberfemurus kanokwanae sp. nov.: 42 — female body, lateral view; 43 — male body, lateral view; 44 — male head, frontal view.