Morphostenophanes sinicus Zhou

Zhou, De-Yao, 2020, A revision of the genus Morphostenophanes Pic, 1925 (Coleoptera, Tenebrionidae, Stenochiinae, Cnodalonini), Zootaxa 4769 (1), pp. 1-81 : 58-59

Morphostenophanes sinicus Zhou , new species ¢ṃẎȐAEƤ

( Figs. 36 A–E; 39B, F, J, N; 40B, G, M–O; 41B, F)

Type materials. CHINA: Yunnan: ♂ (Holotype, SNUC) , Lincang City, Manwan Town, Shuibatou Village , 1900–2200 m, 2016.i–iii, Zi-Chun Xiong. Paratypes (37♂♂, 22♀♀) : CHINA: Yunnan: 1♀ ( SNUC) , 3♂♂, 3♀♀ ( MHBU) , 10♂♂, 6♀♀ ( CZDY, a sample of eggs was preserved in 99.7% ethanol at –18 °C) , Lincang City, Manwan Town, Shuibatou Village , 1900–2200 m, 2016.i–iii, Zi-Chun Xiong; 2♂♂ ( CBNX) , Lincang City, Manwan Town, Shuibatou Village , 1900–2200 m, 2016.i–iii, Zi-Chun Xiong; 3♂♂ ( CYM) , Lincang City, Manwan Town, Shuiba- tou Village , 1900–2200 m, 2017.viii.10, Zi-Chun Xiong; 3♂♂ ( CZDY) , Lincang City, Manwan Town, Shuibatou Village , 1900–2200 m, 2018.iii, Zi-Chun Xiong; 2♂♂, 4♀♀ ( MYNU) , Lincang City, Manwan Town , 2016.ii.22, Zi-Chun Xiong; 1♂, 1♀ ( MYNU) , Lincang City, Manwan Town, Manjiu , 2017.i.15, Zi-Chun Xiong; 2♂♂ ( CZDY, a male was preserved in 99.7% ethanol at –18 °C) , Lincang City, Daxueshan Nature Reserve , 23°59’28.40”N, 100°18’46.21”E, 2018.xi.7, Zi-Chun Xiong; 3♂♂, 2♀♀ ( CZDY) , Lincang City, Maolan Town, Mount Dabin , 24°40’21.58”N, 100°17’58.94”E, 2018.ii, Zi-Chun Xiong; 1♂ ( CBWX) , Lincang City, Bangdong Country, Mount Wulao , 2600 m, Y.-H. Li; 1♂, 4♀♀ ( CBWX, a sample of muscle tissue was preserved in 99.7% ethanol at –18 °C in CZDY) , Mount Wuliang, De’an Village, Sheyaoqing , 2300–2450 m, 2017.vii.10–11, Wen-Xuan Bi; 3♂♂, 1♀ ( CZDY, a sample of muscle tissue was preserved in 99.7% ethanol at –18 °C) , Mount Ailao, Qianjiazhai , near 24°17’1.38”N, 101°15’27.57”E, 2225–2694 m, 2011.viii, native collector; 3♂♂ ( CZDY, a sample of muscle tissue was preserved in 99.7% ethanol at –18 °C) , Yuxi City , Yuanjiang County, Yangchajie Country, ca. 2300 m, 2017. v.1, Min-Fei Hou .

Diagnosis. Body medium-sized to large, slightly greenish. Antennae long, reaching apical third of elytra. Pronotal lateral margins rounded, lateral marginal borders visible in dorsal view along anterior half. Elytra with rows of round or oval segments of striae, some interrupted or straightly presented, with encircled areas convex, elytral aspect ratio greater than 1.9 in male, and greater than 1.6 in female. Apex of parameres bent ventrally in lateral view.

Description. Male ( Fig. 36A, B, D ). Color bronze, with greenish sheen, shagreened; antennae dark brown, claws reddish brown. Body elongate, length 20.0– 24.4 mm, width 7.0– 9.5 mm, strongly convex, noticeably constricted between pronotum and elytra.

Head ( Fig. 39B, F ) transversely subquadrate, sparsely and finely punctate, with outer margin moderately notched between genae and clypeus; clypeus transversely hexagonal, gently bent downwards in front, convex before middle of frontoclypeal suture, with anterior margin nearly straight, clypeal transverse impression marked to absent; frontoclypeal suture moderately grooved, becoming weaker laterally, widely U-shaped; genae strongly raised, depressed before eyes, roundly produced anterolaterally; frons broad, smooth, anterior part gradually sloping forwards; eyes transversely reniform, strongly convex laterally; inner ocular sulci grooved along inner margins; tempora moderately convex. OI = 46.7–50.7.Antennae ( Fig. 40B ) slender, reaching basal third of elytra, with antennomeres weakly thickened to apices; relative lengths of antennomeres: 0.75: 0.36: 1.12: 1.16: 1.24: 1.24: 1.26: 1.17: 1.11: 1.07: 1.22. Mentum ( Fig. 39F ) 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. 39J ) barrel-shaped, PW/PL = 1.07–1.12, widest near middle, anterior margin nearly straight, slightly projecting in middle, anterior marginal border marked; lateral margins rounded, lateral marginal borders thin, slightly sinuate, weakly projecting laterally at widest points, visible in dorsal view along anterior half; posterior margin weakly rounded, emarginate in middle, posterior marginal border marked; anterior angles rounded, posterior angles obtuse; disc strongly convex in middle, shagreened, finely and sparsely punctate. Scutellum widely triangular, glossy, finely punctate.

Elytra elongate oval, widest near middle, EL/EW = 1.92–2.01; strongly convex, highest near middle; with rows of round or oval segments of striae, some interrupted or straight, encircled areas strongly or moderately convex; intervals shagreened and smooth, sparsely and finely punctate.

Prosternum ( Fig. 39N ) shagreened, finely and sparsely punctate; prosternal process declivous, apex truncate; hypomeron rugulose, shagreened. Metasternum finely wrinkled. Abdomen depressed, surface somewhat rough, densely and finely punctate, with sternites III, IV and anterior 3/5 of V sulcate along both sides.

Legs slender. Protibiae ( Fig. 40M ) curved in apical third, apical 3/5 of inner margins pubescent, outer margin emarginate near middle; mesotibiae ( Fig. 40N ) weakly curved in apical third, apical 3/5 of inner margins pubescent; metatibiae ( Fig. 40O ) weakly curved, apical 3/5 of inner margins emarginate and pubescent, outer margins depressed before apices.

Aedeagus ( Fig. 41B ) elongate, curved in lateral view; parameres slender, 0.22 as long as total length, with apex obtusely lance-shaped, weakly bent ventrally in lateral view. Sternite VIII ( Fig. 41F ) with apical lobes ovate in lateral view, superior margins projecting dorsad, exterior margins and inferior margins rounded.

Female ( Fig. 36C, E ). Wider than male, length 20.5–23.8 mm. Eyes closer, OI = 42.9; PW/PL = 1.15; elytra stouter, EL/EW = 1.61–1.76, more convex, highest in middle; abdomen straight in lateral view. Ovipositor elongate, gradually narrowing apically, apex of gonocoxite acute.

Variability. One male from Yuanjiang County has darker and extremely slender body ( Fig. 36B ), another Yuanjiang male has pitch black body color almost without metallic luster. One female from Wuliang Mountain shows ridged elytral intervals ( Fig. 40G ).

Comparative notes. Morphostenophanes sinicus is similar to M. gaoligongensis . Detailed comparison and diagnosis is provided in the comprative notes of M. gaoligongensis .

Distribution. ( Map 1 ) CHINA: Yunnan.

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

Figures

Map 1. Distribution of the Morphostenophanes species. A. Enlargement of Central and Western Yunnan Province.

FIGURE 36. Habitus of Morphostenophanes sinicus Zhou new species. Male (A, B, D), and female (C, E); in dorsal (A–C), and lateral view (D, E). Scale bars = 5 mm.

FIGURE 39. External characters of Morphostenophanes species in the elegantulus-group: M. gaoligongensis Zhou new species (A, E, I, M), M. sinicus Zhou new species (B, F, J, N), M. furvus Zhou new species (C, G, K, O), M. furvus weishanus Zhou new subspecies (D, H, L, P). Male heads in dorsal (A–D) and ventral view (E–H); male prothoraces in dorsal (I–L) and ventral view (M–P). Scale bars = 1 mm.

FIGURE 40. External characters of Morphostenophanes species in the elegantulus-group: M. gaoligongensis Zhou new species (A, H–L), M. sinicus Zhou new species (B, G, M–O), M. furvus Zhou new species (C, E, F, P–R), M. furvus weishanus Zhou new subspecies (D, S–U). Male antennae in dorsal view (A–D). Male elytra (E, F) and female elytra (G). Scutella (H, I). Male protibiae in dorsal view (J, M, P, S), mesotibiae in ventral view (K, N, Q, T), and metatibiae in dorsal view (L, O, R, U). Scale bars of A–G= 2 mm; H, I not to scale, J–U = 1 mm.

FIGURE 41. Anatomic structures of Morphostenophanes species in the elegantulus-group: M. gaoligongensis Zhou new species (A, E), M. sinicus Zhou new species (B, F), M. furvus Zhou new species (C, G), M. furvus weishanus Zhou new subspecies (D, H–K). Aedeagi (A–D) and male sternites VIII (E–H); in dorsal view (d), lateral view (l), and enlargements of paramere apices (p). Male spicula gastrale in lateral view (I, J). Ovipositors in lateral view (K, L). Scale bars = 1 mm; E, all paramere apices not to scale.