Miccolamia dracuncula dracuncula Gressitt, 1942

Figs 17, 18, 37, Map 1 Chinese common name: 峨眉小沟胫天牛

Miccolamia dracuncula Gressitt, 1942: 7, pl. 1, fig. 8. Type locality: Omei Shan (= Emeishan), Sichuan.

Miccolamia dracuncula: Gressitt 1951: 533, 534; Breuning 1963: 490; Hua 2002: 216.

Miccolamia (Miccolamia) dracuncula: Breuning 1975: 52, 53; Löbl and Smetana 2010: 224; Lin and Yang 2019: 261; Danilevsky 2020: 315.

Type material examined.

Holotype (Fig. 45): • male, “ Szechuan, W. China / Omei Shan: Lung-tse / to Shin-kai-sse / 1,000–1,500 M, Aug. / 13, 1940. L. Gressitt ”, “ HOLOTYPE / MICCOLAMIA / DRACUNCULA / J. L. Gressitt ” [red label], “ 峨眉小沟胫天牛 ♀ / Miccolamia / dracuncula Gressitt / 鉴定人: 华立中 1982 ” (SYSU) .

Additional material examined.

Sichuan: • 1 female, Emeishan, Jiulinggang, 1,800 m, 2017. V. 30, leg. Wen-Xuan Bi (CBWX) ; • 1 female, ditto except Wanniancun, 1,200 m, 2017. VI. 2, leg. Xiao-Dong Yang (CCCC) ; • 1 male, 9 females ditto except Emeishan, 1,400–1,800 m, 2018. VI. 16–28, leg. Wen-Xuan Bi (CBWX) ; • 2 males, 1 female, ditto except 1,400, 2018. VI. 27, em. VII. 9 – VIII. 10 (CBWX) . Chongqing: • 1 male, Jiangjin, Simianshan, Dawopu, 2021. V. 2–3, leg. Mei-Ying Lin (IZCAS) . Hubei: • 1 male, Yichang, Houhe, 2013. VIII. 3, leg. Hao Huang (CCCC) .

Description.

Male (Fig. 17). BL = 3.99–4.06, BW = 1.21–1.24 mm. Head, pronotum, elytra mostly, scape, legs (excluding tarsi) and ventral surface dark brown to blackish; antennomeres II – XI light brown on basal 1 / 3, brown on remainders; elytra with an indistinct brownish (or testaceous) area extending from subbasal tubercles to apical 2 / 5 (V-shaped anteriorly, zigzag posteriorly), and with a well-defined, light brown to orangish transverse band occupying apical 1 / 6; tarsi light brown. Head mostly covered with sparse dark brown pubescence, genae and lateral vertex with pale to yellowish (or silvery) pubescence; antennae mostly clothed with dark brown pubescence, with yellowish pubescence sparsely distributed ventrally on scape and forming narrow basal rings on antennomeres II – XI; pronotum covered with similar pubescence to head, lighter hairs mainly situated on lateral sides and forming narrow stripe along the midline (sometimes discontinuous); scutellum covered with yellowish hairs on posterior half; elytra mostly covered with sparse dark brown pubescence, not obscuring integument, pale to yellowish pubescence arranged on the light-colored portion (denser near margins, forming V-shaped macula anteriorly and zigzag band posteriorly), and sparse yellowish pubescence on apical 1 / 6; legs and ventral surface moderately covered with fine yellowish pubescence.

Head slightly wider than pronotal anterior margin, moderately concave between antennal tubercles; frons densely and finely punctate. Eyes deeply emarginated, upper and lower eye lobes connected by 1 row of ommatidia; lower eye lobe ~ 1.7 × as long as wide, 1.3 × as long as gena. Antennae moderately long and slender, subequal to body length; scape moderately clavate, finely punctate and sculptured; antennomere III 0.9–1.0 × as long as IV, 1.3 × as long as scape, 1.4 × as long as antennomere V.

Pronotum subequal in length and width across lateral tubercles, 1.3 × as long as basal width; distinctly constricted near apical and basal 1 / 4 (each with transverse groove); lateral tubercles situated slightly behind the midlength, thickened at base with short acute apices, slightly pointing backward; disk weakly convex, densely and finely punctate throughout, provided with two moderate-sized premedian tubercles and scattered large setigerous punctures mainly on middle 1 / 3.

Elytra elongate, EL / EW = 2.2, EL / PL = 2.9, subparallel-sided on basal 1 / 3, weakly dilated near apical 2 / 5 before converging to separately rounded apices; humeri broadly rounded. Each elytron provided with one large subbasal tubercle tufted with dense short setae at tip and a slight depression behind the subbasal tubercle closer to lateral margin; disk with deep punctures forming about six longitudinal rows on basal 3 / 5. Ventral surface finely punctate. Legs moderately long and thick; metatibiae hardly exceeding elytral apices; tarsal claws appendiculate.

Female (Fig. 18). BL = 3.70–4.74 mm, BW = 1.17–1.50 mm. Almost identical to male in general appearance. Body slightly stouter and legs relatively shorter.

Remarks.

Gressitt (1942) separated this species from M. binodosa by “ the prothorax black and the elytra largely black, marked with pale before middle and at apices. ” It can be further distinguished from the latter by the scape less clavate, discal tubercles of pronotum less developed and elytra with distinct longitudinal rows of deep punctures.

Hua (2002) listed Fujian as one of its distributional areas. However, this distribution record could not be verified in the present study since no citations or voucher specimens were provided therein. Lin et al. 2023 (pl. XV Fig. 4) additionally reported this species from Zhejiang without providing any specimen information. This study formally provides the corresponding voucher specimen and confirms its taxonomic assignment to the herein described Miccolamia dracuncula orientalis ssp. nov.

Distribution

(Map 1). China: Sichuan, Chongqing (new city record), Hubei (new province record), Fujian (?).