Dindymus (Dindymus) chinensis, Stehlík & Jindra, 2006

Stehlík, Jaroslav L. & Jindra, Zdeněk, 2006, Five new species of the genus Dindymus (Heteroptera: Pyrrhocoridae), Acta Entomologica Musei Nationalis Pragae (suppl.) 46, pp. 21-30 : 23-26

Dindymus (Dindymus) chinensis sp. nov.

( Fig. 4 )

Type material. HOLOTYPE: ♁, ‘ China, Hubei Prov., S of Muyuping env., 31° 45′N, 110° 4′ E, 1.100 m, 16.VI.2002, J. Turna lgt.’ ( PPUA) . PARATYPES: ‘ China, Shaanxi Prov., Qinling Mts., Xunyangba env., 1.200m, 20.V.-10.VI.2000 ’, 1 ♁ 3 ♀♀ ( ZJPC) ; ‘ China, Hubei Prov., S of Muyuping env., 31°45′ N, 110°04′ E, 1.100 m, VI.2002, J. Turna lgt.’, 2 ♁♁ 3 ♀♀ ( ZJPC) ; ‘ China, W Hubei, S of Muyuping env., 31°49′N, 110°04′E, 1.300 m, 18.V.2004, V. Ryjáček lgt.’, 2 ♁♁ 2 ♀♀ ( ZJPC) ; ‘ China, Fukien [= Fujian Prov.], Kuatun , 18.IX.46 (Tschung sen)’, 1 ♀ ( MMBC) .

Description. Dorsum red to dark red, membrane grey with rounded black spot of considerable size. Ventral surface of head, antennae (except base of antennomere I), legs, pleura (except upper part of pleuron I), basisternum, segments II-IV of labium, and transverse spot on base of abdominal segment III black. Prosternal collar, segment I of labium, upper half (approximately) of pleuron I, pronotal epipleuron, longitudinal protrusion of pleura II and III, and hypocostal lamina red. Posterior pleural flanges I-III and epicoxal lobes creamy white. Ventrites and genitalia orange or light red.

Body rather large and wide, particularly wide at level of apex of clavus. Eye sockets pronounced, very convex. Eye socket, together with well-developed tempus, bent upwards. Eye tempus touching lateral margin of pronotum. Head in front of eyes conspicuously protruding, venter of head slightly rounded in lateral view. Lateral margin of pronotum rather wide, slightly sinuate in middle. Anterior corner sometimes with weak protrusion of obtuse angle on outer margin. Callar lobe and pronotal lobe elevated. Scutellum very convex except base.

Puncturation on pronotal collar sporadic, irregular, sometimes missing. Pronotal lobe with mainly pronounced, scattered black punctures, broad zone along basal margin without punctures. Scutellum with dense black punctures on base. Clavus and corium with dense and in most cases concolorous puncturation.

Genital capsule rather small. Ventral rim medially extending upwards, on its apex with bow-shaped indentation. Protruding part only slightly inclined into genital chamber and lateromedially with large, rounded indentation. Ventral wall under ventral rim distinctly concave. Lateral rim with almost sharp edge; lateral rim infolding only slightly inclined and evenly, slightly concave. Paramere narrow basally, its body with rather abrupt and somewhat leafshaped widening on its outer side, then gradually narrowing. Apical part very slender, tip small, bent inward.

Female genitalia. Both sides (outer margins) of valvifer I parallel and then bow-shaped towards laterotergite IX. Valvifer I substantially exceeding ventrite VII in lateral view. Valvifer II medially (vertically) deeply depressed. Laterotergite IX of little height.

Measurements (mm), given as means followed by ranges in parentheses. Males. Body length: 12.11 (11.77-12.31). Head: width (including eyes) 2.07 (2.01-2.11), interocular width 1.20 (1.19-1.24). Antenna: antennomere I 2.62 (2.59-2.65), antennomere II 1.93 (1.89-2.00), antennomere III 1.59 (1.54-1.62), antennomere IV 2.59 (2.43-2.69). Pronotum: length 2.15 (2.11-2.16), width 3.81 (3.54-4.00). Scutellum 1.46 (1.40-1.51), width 1.88 (1.70-2.11). Corium: length 5.94, width 2.50 (2.43-2.59).

Females. Body length: 13.90 (12.85-14.71). Head: width (including eyes): 2.27 (2.16- 2.35), interocular width 1.33 (1.24-1.40). Antenna: antennomere I 2.95 (2.75-3.11), antennomere II 2.05 (1.89-2.21), antennomere III 1.79 (1.67-1.84), antennomere IV 2.77 (2.69-2.86). Pronotum: length 2.62 (2.59-2.70), width 4.49 (4.21-4.62). Scutellum 1.67 (1.57-1.84), width 2.15 (2.11-2.21). Corium: length 7.30 (6.86-7.56), width 2.91 (2.75-3.02).

Differential diagnosis. This species is closely related to Dindymus lanius ( Fig. 5 ). Dyndimus lanius differs from the new species by lacking the distinctly creamy white posterior pleural flanges and epicoxal lobes and by having only the posterior margins of the posterior pleural flanges of lighter colour (yellowish or reddish) and the epicoxal lobes black. Dindymus lanius is also much larger, its vertex, lateral margins of the pronotum and costal margin of the corium are substantially wider, and the puncturation on the clavus and corium is more pronounced. Its genital capsule is larger (diameter maximally 2.05 mm; in D. chinensis sp. nov. only 1.57 mm) and the medial protrusion of the ventral rim is narrower apically, only very weakly split, somewhat longer, and inclined into the genital chamber. Dindymus thyoneus Kirkaldy & Edwards, 1902 , was synonymized with D. lanius by DISTANT (1903). Because of the close relationship of the new species with D. lanius , this synonymization has been checked by comparing the type of D. thyoneus and was found justified. Based on the material available to us it seems that D. lanius is limited to the Oriental region whereas D. chinensis sp. nov. occurs in subtropical parts of China.

For comparison the measurements (in mm, as means with ranges in parentheses) for D. lanius are given: Males. Body length: 15.54 (16.04-15.67). Head: width (including eyes) 2.41 (2.40-2.43), interocular width 1.35 (1.32-1.40). Antenna: antennomere I 3.30 (3.29-3.35), antennomere II 2.43 (2.38-2.48), antennomere III 1.93 (1.89-2.00), antennomere IV 2.98 (2.81-3.08). Pronotum: length 2.85 (2.75-2.94), width 5.08 (4.89-5.32). Scutellum 1.94 (1.78- 2.05), width 2.34 (2.11-2.48). Corium: length 7.57 (7.34-7.83), width 3.24 (2.97-3.43). Females. Body length: 17.62 (16.90-18.09). Head: width (including eyes) 2.62 (2.51-2.70), interocular width 1.62 (1.59-1.65). Antenna: antennomere I 3.99 (3.89-4.13), antennomere II 2.75 (2.70-2.81), antennomere III 2.28 (2.05-2.81), antennomere IV 3.13 (3.02-3 29). Pronotum: length 3.37 (3.13-3.64), width 5.87 (5.45-6.05). Scutellum 2.25 (2.16-2.32), width 2.75 (2.65-2.92). Corium: length 8.92 (8.75-9.34), width 3.68 (3.51-3.78).

Etymology. The specific epithet is the Latin adjective chinensis (= Chinese).

Distribution. Central and East China (Provinces Hubei, Shaanxi, and Fujian).

Figures

Figs. 1-5. 1-3 – Dindymus bifurcatus sp. nov. 1 – paratype, male, colour variation; 2 – paratype female; 3 – genital capsule, dorsal wiew. 4 – D. chinensis sp. nov., holotype male. 5 – D. lanius Stål, 1863, male.