Thanmoia gustavi Ramme, 1941

Thanmoia gustavi Ramme, 1941 View in CoL

Figs 1E–M View Fig , 4A–K View Fig , 5 View Fig

Thanmoia gustavi Ramme, 1941: 120 View in CoL .

Thanmoia gustavi View in CoL – Willemse 1957: 484. — Hollis 1975: 208. — Storozhenko 1992: 38; 2022: 4 View Cited Treatment . — Otte 1995: 124. — Yin et al. 1996: 698. — Kim & Pham 2014: 57.

Type material

Holotype

VIETNAM • ♀; Than-Moi , Tonkin (former name for Lang Son Province); collecting date unspecified (recorded as “V. u. VI.” in Ramme’s (1941) original description); H. Fruhstorfer leg.; MfN.

Other material examined

VIETNAM • 1 ♀; Vinh Phuc Province, vicinity of Tam Dao ; 900–1000 m a.s.l.; 9–18 Feb. 1990; A.V. Gorochov leg.; ZIN .

CHINA • 1 ♂; Longjiang, Nonggang , Longzhou County, Guangxi; 22.47519149° N, 106.911604° E; 160 m a.s.l.; 30 Aug. 2024; Jianhua Huang leg.; CSUFT GoogleMaps .

Redescription

MEASUREMENTS (mm). BL: ♂ 24.9–25.6, ♀ 36.8–37.6; PL: ♂ 5.0–5.3, ♀ 8.0–8.2; TL: ♂ 18.3–18.8, ♀ 28.8–29.3; HFL: ♂ 15.1–15.6, ♀ 22.5–22.9.

Male

BODY. Medium-sized, robust, finely and more coarsely punctate.

HEAD. Large, shorter than pronotum; face reclinate in profile view, finely rugosely punctate; frontal ridge very distinct, with lateral margins subparallel and somewhat thickened, percurrent to clypeal margin; lateral facial keels distinct, slightly curved; subocular furrow shallow and distinct; vertex convex; fastigium of vertex broad, not reaching beyond basal antennomere, with anterior margin broadly rounded, lateral margins short and nearly parallel, surface somewhat concave, and separated from vertex by shallow transverse impression. Antennae filiform, reaching behind posterior margin of pronotum, with antennomeres elongate. Eyes long oval; interocular distance twice as broad as basal antennomere; genae finely punctate or almost smooth, except along lower margin where there is rougher sculpturation.

THORAX. Pronotum longer than broad, more or less cylindrical with sides parallel; anterior margin rounded and somewhat thickened, posterior margin triangularly rounded and also somewhat thickened; median keel distinct but low; prozona punctate, metazona more finely punctate, first sulcus present only on disc, second and third both on disc and lateral lobes, second sulcus little before, third sulcus little behind middle; lateral lobe longer than high, lower margin ascending anteriorly from little behind middle and somewhat undulate, posterior part of lower margin practically straight, anterior and posterior margin straight, anterior angle obtusely rounded, posterior angle rectangularly rounded; submarginal sulcus present along anterior margin, indistinct however on disc; upper part of lateral lobe roughly and more finely punctate, with some irregular smooth spots. Prosternal spine conical, almost straight, with apex obtuse. Mesosternal lobes distinctly broader than long, with interspace narrower than the lobe, slightly widened posteriorly; metasternal lobes touching each other in middle.

WINGS. Tegmina and hind wings well developed, reaching apex of hind femur. Tegmina with subparallel margins, apex rounded, anterior margin having a small basal dilatation; anal vein reaching apical fourth. Wing elongated and relatively narrow, posterior margin slightly undulated.

LEGS. Fore and mid legs normal. Hind femur relatively thick, with short attenuated apical part; upper median keels smooth, terminating into very small tooth; knee lobes with very sharp and distinct spine. Hind tibia straight, somewhat dilated apically, margins obtuse, with 11–12 inner and 9 outer spines, outer apical spine absent; inner spurs somewhat longer than outer ones. Hind tarsus short, not reaching hind tibia midlength, second joint distinctly shorter than first one; third joint shorter than two others together; first joint with dilated margins.

GENITALIA. Supra-anal plate triangular, apex obtuse; disc with median basal sulcus and fine transverse sulcus in middle. Cercus conical, almost straight, with apex subacute, reaching apex of supra-anal plate. Subgenital plate short, apical margin triangularly rounded. Epiphallus bridge-shaped, completely divided into two symmetric half, with pair of large and slender outer lophi and small pair of tooth-like inner lophi; ancorae small, apex curved; anterior and posterior projections broadly rounded; oval sclerites elongate. Phallic complex robust; basal valves of penis broad and apodemes long, slightly exceeding basal valves of penis; valves of cingulum short and nearly straight, left and right cingular valves separate, not fused dorso-medially to form valvular plate to cover apical penis valves dorsolaterally ( Fig. 4K View Fig ); apical valves of penis shorter than valves of cingulum ( Fig. 4A–K View Fig ).

COLORATION. General coloration olivaceous green, mixed with yellow. Antennae with basal antennomere yellow, pale green in basal half and brown or blackish brown in apical half. Head with face, mouthparts and lower part of genae yellowish green, antennal sockets yellow, labrum more light brown; vertex with lighter yellowish stripe behind each eye and series of light black spots inside of eyes along with yellow stripes. Pronotum green, mixed with dense dark green spots. Epimerum of meso- and metathorax green. Tegmen brown, anal area yellowish green, apical half of anterior margin and apical margin narrowly marginated with pale whitish band. Hind wing pale bluish, apex and part of hind margin infumate. Fore and mid legs yellow. Hind femur yellow, with incomplete blackish brown praegenicular ring; knee bright red, with black maculation at base; spine of knee lobe yellow with black tip. Hind tibia black with red condylus, sign of yellowish praegenicular ring at ventral surface of base, and somewhat more brownish black at apex; tibial spines black. Hind tarsus light olivaceous green or whitish. Sternum yellow with brownish longitudinal stripe on both sides; abdomen yellow, with dark brown band dorsally and on both sides.

Female

Similar to male, body slightly more robust. Valves of ovipositor straight, lamelliform, narrowed near apex, with upper and lower margins of lower valves finely dentate, and apex rounded truncate. Subgenital plate longer than broad, margins subparallel, posterior margin triangularly produced in middle. Ovipositor yellow.

Distribution

Vietnam ( Lang Son and Vinh Phuc provinces), China (Longzhou County, Guangxi).

Remarks

This species is recorded for the first time from China. Apart from the holotype specimen, there is a female paratype deposited in the Natural History Museum Vienna and a male and two females from the type locality deposited in the National Museum of Natural Science, Madrid ( Hollis 1975). The general coloration of the male individual collected in Longzhou, Guangxi, China is bright bluish and perfectly shows the intraspecific variation of this species in coloration.