Ichthyurus laniger Gestro, 1891

Ichthyurus laniger Gestro, 1891

Figs 5 C ‒ D View Figure 5 , 6 B ‒ D View Figure 6 , 8 D View Figure 8 , 9 E ‒ H View Figure 9 , 11 View Figure 11

Ichthyurus laniger Gestro, 1891: 581, fig. 42, 1906 b: 272, fig. 15.

Type material examined.

Holotype • 1 ♂ ( MGI), [p] “ Carin Chebà / 900–1100 m alt. / L. Fea V XIII- 88 ”, [h] “ laniger / Gestro ”, [p] “ TYPUS ”.

Additional material examined.

China, Yunnan • 1 ♂ ( IZAS), Xishuangbanna, Yunjinghong , 910 m alt., 25. VI. 1958, Yiran Zhang leg. • 2 ♂♂ ( IZAS), Xishuangbanna, Menga , 800 m alt., 1. VI. 1958, Shuyong Wang leg. • 1 ♂ ( IZAS), Xishuangbanna, Menghun , 550‒950 m alt., 6. VI. 1958, Chunpei Hong leg. • 1 ♂ 1 ♀ ( NWAFU), Xishuangbanna, Menghai , 1160 m alt., 27. V. 1974, Yao Zhou & Feng Yuan leg. • 1 ♀ ( MHBU), Lancang, Fubang, Saihan , 1066 m alt., 17. VII. 2017, Zhen Zhou & Xiaolong Luo leg. • 1 ♀ ( MHBU), same locality as the preceding, 1066 m alt., 17. VII. 2017, Jianfeng Liang, Chengcong Yu leg.

Re-description.

Body length (both sexes): 9.2‒9.5 mm; body width (both sexes): 1.5‒1.6 mm.

Male (Fig. 5 C View Figure 5 ). Colouration. Body yellow, head with a transverse black marking on vertex, antennae black, except for yellow antennomeres I ‒ III; pronotum with a pair of black markings on both sides of disc; elytra with a pair of longitudinal black stripes along lateral margins, except for humeri, as well as a pair of obscure black markings on basal parts of disc; leg black at terminal pro- and mesotarsomeres, as well as meta-tarsi and tibiae; abdomen black, narrowly yellow at anterior and lateral margins.

Eyes strongly protruding, interocular distance ca. 0.4 times of the diameter of an eye. Antennae extending to abdominal tergite III, antennomere II ca. 1 / 4 length of I, III ‒ XI subequal in length and ca. 3.0 times longer than II.

Pronotum 1.1 times wider than long, anterior margin arcuate, lateral margins nearly parallel, posterior margin bisinuate, anterior angles feebly emarginate, posterior angles nearly rectangular.

Elytra 1.7 times longer than wide, ca. 3.0 times longer than pronotum, with lateral margins feebly sinuate, sutural margins distinctly bisinuate and strongly dehiscent from the basal 1 / 3 part, distance between sutural margins twice as wide as apical width of an elytron, apices rounded.

Profemora slender and feebly swollen (Fig. 6 B View Figure 6 ), protibiae feebly dilated apically, emarginate near inner apical angles, protarsomeres I widened and lengthened, ca. 5.0 times as long as II; mesotrochanters elongate and obliquely attaching to femora, mesofemora (Fig. 6 D View Figure 6 ) strongly swollen at basal half part, distinctly angled at basal 1 / 3 portion, arcuately excavated along apical 2 / 3 part of ventral side, mesotibiae longitudinally ridged laterally, evenly dilated along whole length, mesotarsomeres I distinctly lengthened, ca. 4.0 times longer than II; metafemora moderately swollen (Fig. 5 C View Figure 5 ), metatibiae and metatarsomeres I (Fig. 6 C View Figure 6 ) progressively dilated apically and ridged laterally, densely covered with long hairs, metatarsomere I and II distinctly lengthened and subequal in length.

Terminal abdominal tergite (Figs 11 A, C View Figure 11 ) densely covered with longer pubescence on surface, ca. 1.5 times longer than wide, with postero-lateral projections stout and ca. 1 / 3 length of the tergite, feebly arcuate at inner and outer margins (Fig. 11 C View Figure 11 ). Proctiger (Fig. 11 C View Figure 11 ) peach-shaped and evenly sclerotised, completely surrounded by paraproct; paraproct (Fig. 11 C View Figure 11 ) strongly developed and tubular, feebly shrunk apically, hardly emarginate in middle of dorso-posterior margin, tergal flange weakly sclerotised, expanded at base and narrowly protruding apically.

Terminal abdominal ventrite (Fig. 11 E View Figure 11 ) trilobed, ca. 1.1 times as long as wide, fissured in middle of apical 3 / 4 part, with lateral lobes moderately diverging posteriorly and nearly straight at inner margins, bisinuately ridged near inner margins, outer margins feebly sinuate, rounded at both inner and outer apical angles, truncate at posterior margins.

Abdominal sternite IX (Fig. 8 D View Figure 8 ) weakly sclerotised and subparallel-sided, ca. 2.8 times longer than wide, with posterior margin obliquely truncate, posterior right and left angles nearly rectangular, anterior left angle small beak-shaped and right angle strongly protruding anteriorly, strongly expanded and rounded at apex.

Aedeagus (Fig. 9 E ‒ H View Figure 9 ): right paramere elongate and conical, abruptly thinned apically, ca. 3.0 times longer than wide; left paramere nearly straight and hooked at apex (Fig. 9 F ‒ H View Figure 9 ), almost vertically stepped near apical 1 / 3 part of outer side (Fig. 9 E, H View Figure 9 ), approximately twice longer than right paramere; setifore extension weakly developed, very short and stout (Fig. 9 G View Figure 9 ); median lobe 1.5 times longer than tegmen, progressively narrowed basally (Fig. 9 A, D View Figure 9 ).

Female (Fig. 5 D View Figure 5 ). Similar to males, but body larger, eyes less protruding, all thoracic legs slender and simple, black at all tibiae and tarsi, as well as basal parts of femora; elytra without any black markings on basal parts of disc; terminal abdominal tergite (Fig. 11 B, D View Figure 11 ) never covered with any longer pubescence on surface, ca. 1.5 times longer than wide, with postero-lateral projections ca. 2 / 5 length of the tergite; terminal abdominal ventrite (Fig. 11 F View Figure 11 ) ca. 1.2 times as long as wide, widest near middle, rounded at lateral margins and confluent with latero-apical angles, feebly roundly protuberant in middle of posterior margin.

Distribution.

China (new record: Yunnan), Myanmar.