Morphostenophanes gaoligongensis Zhou

Zhou, De-Yao, 2020, A revision of the genus Morphostenophanes Pic, 1925 (Coleoptera, Tenebrionidae, Stenochiinae, Cnodalonini), Zootaxa 4769 (1), pp. 1-81 : 55-57

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Morphostenophanes gaoligongensis Zhou

new species

Morphostenophanes gaoligongensis Zhou , new species dzṼḿẎȐAEƤ

( Figs. 34 View FIGURE 34 A–F; 35A–D; 39A, E, I, M; 40A, H–L; 41A, E, L)

Type materials. CHINA: Yunnan: ♂ (Holotype, SNUC, a sample of muscle tissue was preserved in 99.7% ethanol at –18 °C in CZDY) , Mount Gaoligong, Baihualing, Jinchanghe , 25°18’40.68’’N, 98°47’26.45’’E, 1700 m,, Zhi-Wei Dong. Paratypes (17 ♂♂, 12 ♀♀) GoogleMaps : CHINA: Yunnan: 1♀ ( SNUC) , Mount Gaoligong, Baihualing , 2100m, 2012.v.5, Wen-Xuan Bi; 1 ♂ ( CZDY) , 1 ♂ ( CQL) , Mount Gaoligong , Baihualing, Jin-

changhe, 25°18’40.68’’N, 98°47’26.45’’E, 1700 m,, Zhi-Wei Dong; 1 ♂ ( CZDY, a sample of muscle tissue was preserved in 99.7% ethanol at –18 °C), Mount Gaoligong , Baihualing, near Ertaipo, 25°17’57.56’’N, 98°47’7.94’’E’, 2057 m,, Zhong-Liang Jiang GoogleMaps ; 1♀ ( CZJZ) , Mount Gaoligong , Baihualing, 25°18’28.47”N, 98°47’37.80”E, 1588 m, 2019.vii.25, Jia-Zhi Zhang GoogleMaps ; 4♂♂, 1♀ ( MYNU) , Mount Gaoligong , Baihualing, 1900 m, 2015.ii.23, Hao Xu & Jian-Yue Qiu ; 1♀ ( MYNU) , Mount Gaoligong , Baihualing, 1900 m, 2016.ii.13, Hao Xu & Jian-Yue Qiu ; 1♂ ( MHBU) , Mount Gaoligong , Baihualing, 1900 m, 2018.ii.18, Hao Xu & Jian-Yue Qiu ; 1♂, 1♀ ( CZDY, a sample of muscle tissue was preserved in 99.7% ethanol at –18 °C), Tengchong County, Gaoligong N.R., Xiaodifang Village, 24°51’15.43”N, 98°45’10. 73”E, 2172m, 2019.ix.19–20, Liang Ding GoogleMaps ; 1♂, 1♀ ( SNUC) , 3♂♂, 4♀♀ ( CZDY, a female was preserved in 99.7% ethanol at –18 °C), Baoshan City , Tengchong County, Zha- oyun Village, ca. 25°8’56.60’’N, 98°30’21.67’’E, 2350 m, 2018.ii, native collector GoogleMaps ; 2♂♂, 1♀ ( CZDY) , Tengchong County, Zhaoyun Village , ca. 25°8’56.60’’N, 98°30’21.67’’E, 2350 m, 2019.i, native collector GoogleMaps ; 1♂, 1♀ ( CZJZ) , 1♂ ( CZDY) , Yingjiang County, Taiping Town , 1200 m, 2019.v.27, native collector .

Diagnosis. Body medium sized, bronze, sometimes greenish, weaklyshiny. Elytra widest near middle, with rows of encircled segments of striae, some interrupted or straight, each encircled area convex. Aedeagus with apex of parameres not curved ventrally.

Description. Male ( Fig. 34A, B, D, E View FIGURE 34 ; 35A, C View FIGURE 35 ). Bronze, sometimes greenish, shagreened; antennae dark brown, claws reddish brown. Body stout, length 19.7–21.4 mm, width 7.4–7.7 mm, strongly convex, noticeably constricted between pronotum and elytra.

Head ( Fig. 39A, E View FIGURE 39 ) transversely subquadrate, sparsely and finely punctate, with outer margin distinctly notched between genae and clypeus; clypeus transversely heptagonal, gently bent downwards in front, with anterior margin nearly straight, slightly emarginate in middle, clypeal transverse impression short, marked to absent; frontoclypeal suture depressed, becoming weaker laterad, widely U-shaped; genae strongly raised, depressed before eyes, strongly and roundly produced anterolaterally; frons broad, smooth to vaguely wrinkled, anterior part gradually sloping forwards; eyes transversely reniform, strongly convex laterally; inner ocular sulci finely depressed; tempora moderately convex. OI = 51.0–55.1. Antennae ( Fig. 40A View FIGURE 40 ) slender, slightly surpassing basal third of elytra, with antennomeres weakly thickened to apices; relative lengths of antennomeres: 0.68: 0.37: 1.11: 1.19: 1.24: 1.22: 1.22: 1.17: 1.14: 1.04: 1.14. Mentum ( Fig. 39E View FIGURE 39 ) subcircular, lateral margins rounded, seamlessly connected posteriorly to the emarginate posterior margin; medial surface sparsely and coarsely punctate, with several large pores bearing long setae, gradually rising anteriorly, depressed along both sides.

Pronotum ( Fig. 39I View FIGURE 39 ) quadrate, PW/PL = 1.09–1.19, widest near anterior third; anterior margin nearly straight, slightly projecting in middle, anterior marginal border marked; lateral margins weakly curved, anterior half slightly projecting laterally, lateral sulci thin, visible in dorsal view along anterior third to half; posterior margin weakly rounded or nearly straight, emarginate in middle, posterior marginal border marked; anterior angles rounded, posterior angles obtuse; disc strongly convex in middle, depressed before posterior margin, shagreened, finely and sparsely punctate. Scutellum ( Fig. 40H, I View FIGURE 40 ) widely triangular, glossy to shagreened, finely punctate.

Elytra fusiform, widest near middle, EL/EW = 1.75–1.85; strongly convex, highest near middle; with rows of round and oval segments of striae, some interrupted or straight, encircled areas convex; intervals strongly convex, surface smooth, sparsely and finely punctate.

Prosternum ( Fig. 39M View FIGURE 39 ) shagreened, finely and sparsely punctate; prosternal process produced posterioly or declivous, apex truncate; hypomeron weakly rugulose, shagreened. Metasternum glossy, metaventral anterior process weakly wrinkled. Abdomen depressed, surface somewhat rough, densely and finely punctate, with sternites III and IV sulcate in both sides.

Legs slender. Protibiae ( Fig. 40J View FIGURE 40 ) curved in apical third, apical 3/5 of inner margins pubescent; mesotibiae ( Fig. 40K View FIGURE 40 ) weakly curved in apical third, apical half of inner margins pubescent; metatibiae ( Fig. 40L View FIGURE 40 ) weakly sinuous, apical 3/5 of inner margins emarginate and pubescent, outer margins depressed before apices.

Aedeagus ( Fig. 41A View FIGURE 41 ) elongate, curved in lateral view; parameres slender, straightly producing in lateral view, 0.20 as long as total length, with apex obtusely lance-shaped. Sternite VIII ( Fig. 41E View FIGURE 41 ) with apical lobes rectangular in lateral view, superior margin straight, exterior margins straight, inferior margins rounded, cornered at lowest point.

Female ( Fig. 34C, F View FIGURE 34 ; 35B, D View FIGURE 35 ). Stouter than male, length 20.0– 23.7mm. OI = 55.0–56.3, PW/PL = 1.14–1.23; elytra more convex, EL/EW = 1.57–1.75, highest in middle; abdomen straight in lateral view. Ovipositor elongate, gradually narrowing apically, apex of gonocoxite acute or truncate.

Variability. Both males and females of this species vary in habitus and body color. The male holotype ( Fig. 34A, D View FIGURE 34 ) and one female paratype ( Fig. 34C, F View FIGURE 34 ) have relatively stout bodies, while other male paratypes (as shown in Fig. 34B, E View FIGURE 34 ) and another paratype female shown less bloated bodies. Some individuals have greener body, even dark green ( Fig. 35 View FIGURE 35 A–D). The male holotype has a pair of impressions on scutellum ( Fig. 40H View FIGURE 40 ), while other specimens lack such impressions (as shown in Fig. 40I View FIGURE 40 ). One male paratype ( Fig. 34B, E View FIGURE 34 ) has more coarsely microsculptured pronotal disc and scutellum, and less curved protibiae. One female paratype has trcunted apex of gonocoxite ( Fig. 41L View FIGURE 41 ), with a smoothly curved apical edge, which seems not caused by damage or abrasion. Another female has a normal, acute gonocoxite as those in all other congeners within the elegantulus - and atavus -group.

Comparative notes. Morphostenophanes gaoligongensis resembles M. sinicus , but can be clearly distinguished from the latter by its straight produced apex of parameres in lateral view, compared to that of M. sinicus , which isventrally bent. A preliminary identification of M. gaoligongensis is based on its more glossy body, antennomere XI less than 3x as long as wide comprared to that of M. sinicus more than 3x as long as wide, and stouter male elytra with aspect ratios ranging from 1.75–1.85, compared to that of M. sinicus in male greater than 1.9.

Distribution. ( Map 1 View Map 1 ) CHINA: Yunnan.

Etymology. The new species is named after its type locality, Gaoligong Mountains.