Pseudoechthistatus sinicus, Bi, Wen-Xuan & Lin, Mei-Ying, 2016

Bi, Wen-Xuan & Lin, Mei-Ying, 2016, A revision of the genus Pseudoechthistatus Pic (Coleoptera, Cerambycidae, Lamiinae, Lamiini), ZooKeys 604, pp. 49-85 : 62-63

Taxon classification Animalia Coleoptera Cerambycidae

Pseudoechthistatus sinicus sp. n. Figures 9, 10, 24, 34, 43, 52, 59, 71, Map 1

Type material.

Holotype: male, "Yunnan, Dayao County, Santaixiang / Xiaobaicaoling / 2980 m 2013.V.29-30 / leg. Wen-Xuan Bi" (IZAS, IOZ(E) 1905347). Paratypes (22 males, 22 females): 3 males, 4 females, same data as holotype but (CBWX); 1 male, 1 female, same data as holotype but (SHEM); 1 male, 1 female, same data except "leg. Xiao-Dong Yang" (CCCC); 1 male, "CHINA. Yunnan, Binchuan / Jizushan / 2300 m 2010.VII.12 / leg. Xiao-Bin Song" (CBWX); 1 male, ditto except “2010.VII.16” (CSXB); 3 females, " CHINA. Yunnan, Binchuan / Jizushan / 2258 m 2010.VI.10 / leg. Xiao-Dong Yang" (CCCC); 2 females, "CHINA, Yunnan, Dali zhou, / Binchuan county, Jizushan, / 2500-3200 m, 26.-31.VII.1993, / leg. C. Holzschuh" (CCH); 1 female, "Djo-Kou-La / alt. 1200 m / Nord Ouest Yunnan" (NHRS-JLKB000024084); 1 male, "YUNNAN 1800-2500 m / 25.10N 100.21E / WEISHAN mt. / 22-25.VI.92 / David Král leg." (CCH); 10 males, 7 females, "CHINA. Yunnan, Weishan / Weibaoshan 2400-2500 m / 2015.VIII.16 / leg. Wen-Xuan Bi" (CBWX); 3 males, 3 females, ditto except "leg. Xiao-Dong Yang" (CCCC); 1 male, "Yunnan Yongping to Yangbi / 1955.V.29. / leg. Yang Xing-Chi", " Pseudoechthista - / tus obliquefasciatus / Pic / det. Chiang Shu-Nan 1961", “100” (IZAS, IOZ(E) 1905348).

Description.

Male (Fig. 9). Body length 16.5-23.0 mm, humeral width 5.0-7.0 mm. Body dark brown; head, pronotum and ventral surface covered with tawny and brown pubescence. Head with four short tawny vittae behind upper eye lobes. Antennal scape with sparse light yellowish and brown pubescence; pedicel, basal two-thirds of 3rd antennomere and basal half of 4th antennomere with light yellowish pubescence, remainder with fine brown pubescence. Pronotum with two longitudinal tawny bands on each side of disk and other two longitudinal postmedian bands on lateral margins, the discal bands slightly longer than half of pronotal length. Scutellum densely clothed with tawny pubescence. Elytron with pubescence predominantly reddish brown, with tawny pubescence narrowly forming the subbasal annular marking and some small spots scattered near suture and humerus, with light yellowish pubescence forming the middle band and the preapical stripe; the middle band narrow, moderately oblique, irregularly marginated, zigzagged near middle, hardly reaching suture; the preapical stripe narrow, well developed. Legs (Fig. 34) densely clothed with tawny and brown pubescence of which the tawny one forming small spots sparsely scattered on femora and becoming denser on tibiae.

Body elongate, oblong oval. Head (Fig. 24) with frons sparsely and moderately punctured; lower eye lobe 1.1 times as long as width, 0.5 times as long as gena. Antennae ca. 1.6-1.7 times as long as body length, surpassing elytral apex at base of 6th antennomere; 3rd antennomere ca. 1.6 times as long as scape, ca. 1.3 times as long as 4th antennomere; coarsely punctured on scape to basal half of 3rd antennomere; scape to 3rd antennomere fringed beneath. Pronotum subequal in length and basal width, lateral spine moderately long, thickened at base with acute apex; metasternum ca. 1.3 times as long as mesosternal length. Elytra 1.4 times as wide as pronotal base at humeri, 1.8 times as long as humeral width; humeri slightly constricted, widened at basal two-fifth, then convergent toward obliquely truncated apices; disk finely punctured, moderately granulated near humerus and behind basal one-fourth, weakened near apical one-third; subbasal tubercle moderately developed and raised, ca. 1.2 times as wide as scutellar width. Hindwings (Fig. 43) reduced, slightly shorter than elytral length.Legs long and slender, metafemora slightly exceeding elytral apices.

Male genitalia (Figs 52, 59). Tergite VIII (Fig. 52a) transverse, truncated apically and rounded at sides, length 0.8 times as long as width. Tegmen (Fig. 52 b–c) with lateral lobe subparallel-sided in basal half, moderately narrowed toward acute apex. Median lobe (Fig. 52 d–e) with apex acuminate in antero-dorsal view. Endophallus (n = 4, Fig. 59) subequal to triple length of median lobe, the length of MT ca. 2.4 times as long as the length of BPH, the length of CT+PB slightly longer than the length of BPH; MPH moderately curved at apical one-third, PB cylindrical at basal one-third, basal swelling (bs) of CT slightly swollen laterally; APH strongly constricted, ca. 0.5 times as wide as the maximum width of PB at base, with apical bulb (ab) heavily sclerotized apically, obliquely truncated in lateral view; small spicules densely distributed on apical bulb and apical two-fifths of PB.

Female (Fig. 10). Body length 17.0-22.0 mm, humeral width 5.4-6.6 mm. Almost identical to male in general appearance. Antennae ca. 1.2-1.3 times as long as body length, apical three or four antennomeres surpassing elytral apex; scape to 5th or 6th antennomere fringed beneath; 3rd to 7th antennomeres with light pubescence basally; elytron longer in proportion to body length (ca. 2.0 times as long as humeral width); legs comparatively short, metatibiae exceeding elytral apices at basal one-fourth.

Remarks.

This new species can be distinguished from most of the congeners by elytra comparatively shorter (only 1.8 times as long as humeral width), humeri distinctly constricted in both sexes; hindwings reduced; granules moderate in size near humerus and behind basal one-fourth, weakened near apical one-third; APH of endophallus strongly constricted. It is similar to Pseudoechthistatus obliquefasciatus by color pattern but can be easily distinguished by elytra relatively shorter in length, with bigger subbasal tubercles, median pubescent band not so oblique and APH of endophallus more strongly sclerited. It is similar to Pseudoechthistatus granulatus by size of elytral subbasal tubercles but can be separated by shorter elytra, weaker granules, and denser ventral tawny pubescence.

Etymology.

The new species is named after the country of its type locality.

Distribution

(Map 1). China: Yunnan.