Pseudoechthistatus granulatus Breuning, 1942

Bi, Wen-Xuan & Lin, Mei-Ying, 2016, A revision of the genus Pseudoechthistatus Pic (Coleoptera, Cerambycidae, Lamiinae, Lamiini), ZooKeys 604, pp. 49-85 : 58-61

Taxon classification Animalia Coleoptera Cerambycidae

Pseudoechthistatus granulatus Breuning, 1942 Figures 3-5, 19, 22, 31, 39, 42, 50, 60, 69, 70, Map 1

Pseudechthistatus (sic) granulatus Breuning, 1942: 133. Type locality: Tatsienlu (?). Type depository: NHMB

Pseudoechthistatus granulatus : Gressitt 1951: 349; Li 1988: 46; Pu 1992: 601; Li 2009: 158, 182.

Pseudechthistatus (sic) granulatus : Hua 2002: 227; Hua et al. 2009: 465; Löbl and Smetana 2010: 286.

Type material examined.

Holotype (Fig. 19), female, “Tatsienlu”, " Pseudechthistatus / granulatus / mihi Type! / det. Breuning" examined through three photographs taken by J. Yamasako & N. Ohbayashi in NHMB, 2012.

Additional material examined.

(22 males, 20 females): 1 male, Yunnan Prov., Gaolinggongshan, Fugong County, Shiyueliangxiang, Shibaliyingdi, 3105 m, 27.18380°N, 98.71021°E, 2004.V.7 night, leg. Hong-Bin Liang (IZAS, IOZ(E) 1904798); 1 male, 1 female, Yunnan, Fugong, Shibaliyingdi, 3105 m, 2005.VIII.9, leg. Hong-Bin Liang (CBWX); 1 male, CHINA, Yunnan Prov. Gongshan County, No12 Bridge–Yakou, 2750-3680 m, N27.43, E98.28, 2000.VII.18, leg. H. B. Liang, Sino-America Exped. (IZAS, IOZ(E) 1904797); 2 females, Yunnan, Gongshan, Gabocun, 2478 m, 2014.VI.14, leg. Xiao-Dong Yang (CCCC); 2 females, ditto except 2500 m, 2015.VI.16, leg. Wen-Xuan Bi (CBWX); 1 male, Yunnan, Gongshan, Sendang–Dabadi, 2834 m, 2014.VI.16, leg. Xiao-Dong Yang (CCCC); 1 male, 1 female, ditto except 2840 m, 2015.VI.20, leg. Wen-Xuan Bi (CBWX); 1 male, ditto except leg. Yu-Tang Wang (CCCC); 1 female, ditto except leg. Xiao-Dong Yang (CCCC); 1male, ditto except Dabadi, 3020 m, 2015.VIII.11, leg. Wen-Xuan Bi (CBWX); 12 males, 6 females, Yunnan, Gongshan, Nageluo, 2850-2750 m, 2015.VI.12, leg. Wen-Xuan Bi (CBWX); 1 female, ditto except 2750 m, leg. Yu-Tang Wang (CCCC); 3 males, 4 females, ditto except 2015.VI.15, leg. Wen-Xuan Bi (CBWX); 1 female, ditto except 2750 m, leg. Chao Wu (CBWX); 1 female, ditto except 2015.VIII.12, leg. Xiao-Dong Yang (CCCC).

Redescription.

Male. (Fig. 3). Body length 15.0-16.8 mm, humeral width 4.0-4.6 mm. Body dark brown; head and pronotum covered with yellowish, tawny and brown pubescence, ventral surface with yellowish pubescence forming small spots sparsely scattered throughout. Head with four short tawny vittae behind upper eye lobes. Antennal scape, pedicel and 3rd antennomere with sparse light yellowish pubescence, 4th to 8th antennomeres with same color pubescence at base, remainder with fine brown pubescence. Pronotum with two longitudinal tawny bands on each side of disk and other two longitudinal bands on lateral margins; the discal bands longer than two-thirds of pronotal length, sometimes interrupted anteromedially. Scutellum densely clothed with tawny pubescence, slightly sparse along middle. Elytron with pubescence predominantly brown, with tawny pubescence narrowly forming the subbasal annular marking, and some small spots scattered mainly near suture, with yellowish (or tawny) pubescence forming the middle band and the preapical stripe; the middle band usually moderately oblique, shape variable, widely interrupted to nearly interrupted near lateral margin, broadly and transversely reaching suture (in some individuals, the middle band complete, obliquely reaching suture directly without broadening and curving); the preapical stripe reduced, slightly shorter than one-fifth of elytral length. Legs (Fig. 31) clothed with sparse brown and dense yellowish pubescence of which the lighter one forming small spots moderately scattered on femora and becoming denser on tibiae.

Body elongate, oblong oval. Head (Fig. 22) with frons sparsely punctured; lower eye lobe 1.3 times as long as width, 0.8 times as long as gena. Antennae ca. 1.8-1.9 times as long as body length, surpassing elytral apex by 5-6 antennomeres; 3rd antennomere ca. 1.8 times as long as scape, ca. 1.3 times as long as 4th antennomere; scape and basal half of 3rd antennomere coarsely punctured; scape to 3rd antennomere sparsely fringed beneath. Pronotum 1.2 times as long as basal width, lateral spine developed, moderately thickened at base with acute apex; metasternum subequal in length to mesosternum. Elytra ca. 1.4 times as wide as pronotal base, 2.0 times as long as humeral width; humeri slightly constricted, widened at basal two-fifth, then convergent toward obliquely truncated apices; disk moderately punctured, becoming shallower at apical one-third, distinctly with moderate to large size, raised granules moderately sparse; subbasal tubercle developed, ca. 1.3 times as wide as scutellar width. Hindwings (Fig. 42) strongly reduced, 0.8 times as long as elytral length. Legs long and slender, metafemora slightly exceeding elytral apices.

Male genitalia (Figs 50, 60). Tergite VIII (Fig. 50a) transverse, slightly emarginated apically and rounded at sides, length 0.8 times as long as width. Tegmen (Fig. 50 b–c) with lateral lobe widest at base, gently narrowed toward rounded apex. Median lobe (Fig. 50 d–e) with apex subacute in antero-dorsal view. Endophallus (n = 3, Fig. 60) longer than triple length of median lobe, the length of MT ca. 2.5 times as long as the length of BPH, the length of CT+PB slightly longer than the length of BPH; MPH strongly curved at apical one-third, PB cylindrical at basal one-third, basal swelling (bs) of CT developed; APH moderately constrictive, ca. 0.6 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 anterior margin of PB.

Female (Figs 2, 3). Body length 17.2-20.7 mm, humeral width 5.0-5.6 mm. Almost identical to male in general appearance. Antennae ca. 1.3-1.4 times as long as body length, apical 3-4 antennomeres surpassing elytral apex; scape to 7th antennomere fringed beneath; lower eye lobe subequal in length and width, 0.5 times as long as gena; pronotum subequal in length and basal width; elytron longer in proportion to body length (ca. 2.2 times as long as humeral width); legs comparatively short, metatibiae exceeding elytral apices at base.

Diagnosis.

Lower eye lobe rather short, 0.5 times as long as gena (in female); elytron with granules large and raised, sparsely scattered throughout, middle band variable, complete or interrupted to nearly interrupted near lateral margin; humeri slightly constricted; hindwings strongly reduced. Endophallus with APH constrictive, apical bulb (ab) heavily sclerotized apically, obliquely truncated in lateral view.

Distribution

(Map 1). China: Sichuan(?), Yunnan.

Remarks.

Based on the morphological similarities, the population from Gongshan County and Fugong County of Yunnan Province are considered as Pseudoechthistatus granulatus temporarily. The type locality of Pseudoechthistatus granulatus , “Tatsienlu” (= Kangding County) perceived to be doubtful for the following reasons. Based on reliable collecting data, the distribution of a flightless species (at least among this genus) does not support such remote distance (more than 400 km away from “Tatsienlu” to the population in Yunnan). Moreover, no individual has thus far been found in the intervening area. The population from Gongshan and Fugong could not be separated from the type specimen from “Tatsienlu” morphologically. The weak differences, such as slightly longer antennae and lighter pubescence color should be treated as intraspecific variation. Furthermore, females from Yunnan share the shorter lower eye lobes with the female type specimen, while other congeners have longer lower eye lobes (except for Pseudoechthistatus pufujinae sp. n.). The poor and handwritten label of the holotype (Fig. 19) is presumably simply mislabeled. In other words, “Tatsienlu” had been written on labels merely to indicate the general region, and the exact locality could be farther afield (Cox, 1945: 209, 212). Until now, no additional specimens have been reported or found from Kangding. (The first author had visited Kangding three times, trying hard to find topotype specimens but without success.) 5) Fugong was included in the distribution list by Li (1988, 2009) and Pu (1992). In order to clarify this doubt, further studies are necessary based on obtaining the topotype, especially the male specimens from Kangding.