Xenicotela distincta (Gahan, 1888)

Xie, Guanglin, Barclay, Maxwell V. L. & Chen, Bin, 2022, Taxonomic study on the genus Xenicotela Bates from China (Cerambycidae, Lamiinae, Lamiini), ZooKeys 1122, pp. 145-158 : 145

Xenicotela distincta (Gahan, 1888)

Figs 1 , 2 , 7 , 8 , 10 , 12 , 13 , 22 , 23

Monohammus distinctus Gahan, 1888: 392; Aurivillius 1922: 95. Type locality: Assam, India.

Xenicotela distincta : Breuning 1944: 373; Gressitt 1951: 382; Rondon and Breuning 1970: 458; Hubweber et al. 2010: 288; Weigel et al. 2013: 288; Kariyanna et al. 2017: 253; Lin and Tavakilian 2019: 324.

Nephelotus Nephelotus 4-maculatus Pic, 1925: 16. Type locality: Tonkin, Vietnam.

Nephelotus tonkineus Pic, 1926: 143. Type locality: Hoa-Binh, Vietnam.

Xenicotela distincta m. tonkinensis Breuning, 1944: 373.

Monochamus binigricollis : Wang 1998: 599, misidentification.

Type material examined.

Holotype of Monohammus distinctus Gahan (NHMUK), the label details are shown in Fig. 7 . Holotype of Nephelotus tonkineus Pic (MNHN), the label details are shown in Fig. 10 .

Other materials examined.

One male, China: Yunnan Province, Cangyuan County, Daheishan , alt. 2400 m, May 15, 1980, coll. by Kaiquan Li (SWU); One female, China: Guizhou Province, Ziyun County , Nazuo Village , June 8, 2019, coll. by Shulin Yang (GZNULS); one female, China: Yunnan Province, Xishuangbanna Prefecture , Danuoyou , May 29, 2008, coll. by Meiying Lin (IZAS); one male, China: Yunnan Province, Jiangcheng County , Qushui Township , alt. 564 m, 22°37'1"N, 102°9'49"E, June 8, 2019, coll. by Lanbin Xiang (YZU) .

Redescription.

Male. Body length 10.0 mm, humeral width 3.4 mm. Body mostly black brown to black, densely clothed with greyish yellow and black pubescence forming markings. Antennae dull reddish brown, scape and extreme apex of pedicel clothed with greyish yellow pubescence, base and extreme apex of antennomeres III-XI annulated with greyish yellow pubescence. Head provided with two slightly quadrate black pubescent spots behind upper lobes of eyes, pronotum also provided with two suboval black spots of the same texture at the posterior half, distinctly edged with greyish yellow pubescence and widely separated anteriorly. Scutellum bordered by greyish yellow pubescence. Elytra mostly black brown to black at base, with a broad transverse black band intermingled with some irregular small greyish yellow pubescent spots at middle, mostly clothed with greyish yellow pubescence intermingled with some irregular black spots at apex. Ventrites I-IV fringed with long setae at posterior edge. Legs with femora and tibiae black brown medially, with a greyish yellow pubescent ring at base and apex.

Head finely and densely punctate, frons transverse, lower lobe of eyes about as long as gena. Pronotum broader than long, deeply and slightly densely punctate, lateral spine short and small. Scutellum short, ligulate. Elytra elongate, about 2.1 times as long as width across humeri, subparallel in basal two-thirds, gradually narrowed backwards in apical third, apices slightly transversely truncate, surface deeply and slightly coarsely punctate. Legs relatively short, claws divaricate.

Female. Similar to male, body sometimes mostly reddish brown; antennae relatively short; lateral spine of pronotum larger than that of male; elytra about 2.0 times as long as humeral width, median band sometimes interrupted by a sutural pubescent strip.

Male genitalia. Tergite VIII (Figs 12 , 13 ) with both sides relatively circularly converge to apex, apex slightly truncated, clothed with short to medium straight setae along apical and lateral sides. Tegmen (Figs 22 , 23 ) length approximately 1.73 mm, maximum width of ringed part approximately 0.66 mm, each paramere length approximately 0.37 mm, basal width approximately 0.19 mm; parameres widely separated at apex, with length-width ratio of each lobe about 1.95, rounded at apex, about apical two-fifths clothed with sparse setae of different lengths and thicknesses. Median lobe (Figs 22 , 23 ) slightly longer than tegmen, obviously arcuate in lateral view, apical margin of dorsal plate and ventral plate nearly straight; median struts relatively broad, about two-fifths length of median lobe.

Distribution.

China (Yunnan, Guizhou), India, Vietnam, Nepal, Laos.

Comments.

Wang (1998) first recorded Monochamus binigricollis Breuning, 1965 from China based on specimens from Guizhou (Wangmo) and Yunnan (Cangyuan). However, after examination of the specimens, we found that they were misidentified, and actually belong to X. distincta (Fig. 8 ). According to the information currently available, M. binigricollis should be excluded from the fauna of China. M. binigricollis needs to be transferred to the genus Xenicotela Bates. This issue will be discussed and processed in a separate paper.

Figures

Figures 1, 2. Habitus of Xenicotela distincta (Gahan, 1888) 1 male 2 female 1 from Guizhou: Ziyun 2 from Yunnan: Jiangcheng.

Figures 7 - 10. Habitus of Xenicotela spp. 7 holotype of Monohammus distinctus Gahan, 1888 8 Xenicotela distincta (Gahan, 1888) 9 holotype of Monochamus convexicollis Gressitt, 1942 10 holotype of Nephelotus tonkineus Pic, 1926.

Figures 11 - 25. Habitus of Xenicotela spp. 11 - 15 tergite VIII with sternites VIII & IX 16, 17 tegmen 18 - 20 aedeagus 21 female genitalia 22 - 25 phallus 11, 13, 15, 17, 19, 24 ventral view 12, 14, 16, 20, 22 dorsal view 18, 23, 25 lateral view 11, 16 - 21 Xenicotela convexicollis (Gressitt, 1942) comb. nov. 12, 13, 22, 23 Xenicotela distincta (Gahan, 1888) 14, 15, 24, 25 Xenicotela griseomaculata sp. nov. Scales: 0.5 mm (11, 16 - 20); 1 mm (12 - 15, 21 - 25).