Morphostenophanes lincangensis Zhou

Zhou, De-Yao, 2020, A revision of the genus Morphostenophanes Pic, 1925 (Coleoptera, Tenebrionidae, Stenochiinae, Cnodalonini), Zootaxa 4769 (1), pp. 1-81 : 49-50

Morphostenophanes lincangensis Zhou , new species OiȕẎȐAEƤ

( Figs. 29 A–D; 31E, J, O, T, Y; 32E, S–U; 33E, K)

Type materials. CHINA: Yunnan: ♂ (Holotype, SNUC) , Lincang City, Gengma County, Nangunhe Nature Reserve , 23°38’38.83”N, 99°23’13.84”E, 2006 m, 2017.vi.26, Zi-Chun Xiong. Paratypes (12♂♂, 7♀♀) : CHINA: Yunnan: 1♀ ( SNUC) , 1♀ ( MHBU) , 1♂, 1♀ ( CYM) , 3♂♂, 2♀♀ ( CZDY, a female was preserved in 99.7% ethanol at –18 °C) , Lincang City, Gengma County, Nangunhe Nature Reserve , 2000 m, 2018.viii.2, Zi-Chun Xiong; 4♂♂ ( CZDY) , Lincang City, Gengma County, Nangunhe Nature Reserve , 23°38’38.83”N, 99°23’13.84”E, 2006 m, 2017. vi.26, Zi-Chun Xiong; 1♂, 1♀ ( CZDY) , Lincang City, Daxueshan Nature Reserve , 23°59’28.40”N, 100°18’46.21”E, 2018.xi.7, Zi-Chun Xiong; 1♂ ( CYM) , Yongde County, Daxueshan Nature Reserve, near Yinchangjie Reservoir , 24°11’53.58”N, 99°39’14.17”E, 2447m, in a hollow of Saurauia tree, 2015.vi.18, Mao Ye; 1♂ ( CBWX) , Yongde County, Yalian Country, Damaidi Village , 2012.v.6, Xiao-Dong Yang; 1♂, 1♀ ( HNHM, identified by Ottó Merkl) , Yunnan Province, SSE Shuangjiang Town , 23°25’01’’ N / 99°57’01’’ E, 23°25’10’’ N / 99°57’24’’ E, 2425–2570 m, 2011.vi.20, Belousov, Kabak & Korolev .

Diagnosis. Body large and elongate, greyish-black, basal 3/4 of femora reddish.Antennae long, reaching apical 2/7 of elytra; elytra striate, with aspect ratio over 1.9 in male, and over 1.7 in female; protibiae thickened, strongly curved in apical third, metatibiae strongly recurved; leaf shaped apical lobes of sternite VIII.

Description of male. Male ( Fig. 29A, C ). Color greyish-black, antennae, mouthparts, basal 3/4 of femora, apical portions of tibiae, and tarsi reddish brown, shagreened. Body slender, length 22.3–26.3 mm, width 7.6–8.6 mm, moderately convex, noticeably constricted between pronotum and elytra.

Head ( Fig. 31E, J ) transversely subquadrate, densely and markedly punctate, with outer margin strongly notched between genae and clypeus; clypeus transversely hexagonal, gently bent downwards in front, with anterior margin straight, clypeal transverse impression short, marked to absent; frontoclypeal suture deeply grooved, becoming weaker laterally, widely U-shaped; genae strongly raised, depressed before eyes, strongly and roundly produced anterolaterally; frons broad, anterior part gradually sloping forwards, vertexal lateral impressions narrow, distinct to vague, extending backward and curved oppositely, forming a U-shaped impressions; eyes transversely reniform, strongly convex laterally; inner ocular sulci shallowly depressed along inner margins, becoming broader posteriad; tempora slightly convex, punctures as those on frons. OI = 44.0–49.5. Antennae ( Fig. 32E ) slender, reaching basal 2/7 of elytra, with antennomeres weakly thickened to apices; relative lengths of antennomeres: 0.92: 0.41: 1.53: 1.36: 1.53: 1.48: 1.36: 1.34: 1.26: 1.14: 1.22. Mentum ( Fig. 31J ) inversely trapezoidal, lateral margins straight; medial surface coarsely punctate, with several large pores bearing long setae; gradually rising from base to apex, depressed along each side.

Pronotum ( Fig. 31O ) quadrate, PW/PL = 0.93–1.02, widest slightly before anterior third, anterior margin weakly rounded, anterior marginal border thin, vague; lateral margins weakly rounded, lateral marginal borders thin, 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 moderately convex, shagreened, finely and sparsely punctate. Scutellum widely triangular, glossy, finely punctate.

Elytra elongate ovate, widest near middle, EL/EW = 1.90–1.99; strongly convex, highest near middle; with 9 continuous furrowed striae, 1 st branching, and 8 th ending in apical seventh of elytra; 1 st, 2 th, 3 rd, 7 th, and 8 th converged at ends, 4 th, 5 th, and 6 th converging in apical seventh, 2 nd and 3 rd converging at fore-ends; intervals strongly convex, glossy, coarsely wrinkled on apical seventh, sparsely and finely punctate.

Prosternum ( Fig. 31T ) shagreened, finely and sparsely punctate; prosternal process almost vertically declivous behind coxae, pointed at apex; hypomeron moderately rugulose, shagreened. Metasternum smooth, metaventral anterior process finely wrinkled. Abdomen depressed, somewhat wrinkled, densely and finely punctate, sternites III and IV sulcate on sides.

Legs slender. Protibiae ( Fig. 32S ) thick, strongly curved in apical third, more than apical half of inner margins emarginate and pubescent; mesotibiae ( Fig. 32T ) weakly curved in apical fourth, apical half of inner margins emarginate and pubescent; metatibiae ( Fig. 32U ) strongly curved in middle, apical 3/5 of inner margins pubescent, outer margins depressed before apices.

Aedeagus ( Fig. 33E ) elongated, curved in lateral view; parameres slender, 0.21 as long as the total length, with ovoid apex. Sternite VIII ( Fig. 33K ) strongly sclerotized, with leaf shaped apical lobes in lateral view, constricted at each base, produced posteriorly, apex pointed.

Female ( Fig. 29B, D ). Wider than male, length 24.3–26.5 mm. OI = 44.6–47.1, PW/PL = 1.08–1.10.Elytra more convex, highest in middle, EL/EW = 1.68–1.90; abdomen straight in lateral view. Ovipositor ( Fig. 31Y ) elongate, sclerotized and acinaciform, apex of gonocoxite acute.

Comparative notes. Morphostenophanes lincangensis looks like a longer M. atavus . Its strongly elongate and less convex elytra, thicker tibiae, curved metatibiae, and shape of apical lobes of sternite VIII are shared with M. birmanicus , M. bannaensis and M. vietnamicus . M. lincangensis can be distinguished from M. birmanicus by the latter possessing more elongate antennae reaching apical third of elytra, greenish colored pronotum widest in anterior 2/5, much wider elytra with bronze metallic luster. M. lincangensis can be distinguished from M. bannaensis by the latter having tubercules of different sizes along each elytral interval. M. lincangensis can be distinguished from M. vietnamicus by the latter having bronzy color, male pro- and mesotibiae bugled in apical 2/5.

Distribution. ( Map 1 ) CHINA: Yunnan.

Etymology. The new species is named after its type locality, Lincang City.

Figures

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

FIGURE 29. Habitus of Morphostenophanes lincangensis Zhou new species. Male (A, C), and female (B, D); in dorsal (A, B), and lateral view (C, D). Scale bars = 5 mm.

FIGURE 31. External characters and anatomic structure of Morphostenophanes species in the atavus-group: M. atavus (Kaszab) (A, E, K, P), M. bannaensis Zhou new species (B, G, L, Q), M. birmanicus (Kaszab) (C, H, M, R), M. brevigaster Zhou new species (D, I, N, S), M. lincangensis Zhou new species (E, J, O, T, Y), and M. vietnamicus (Kaszab) (U–X, Z). Male heads in dorsal (A–E, U) and ventral view (F–J, W); male prothoraces in dorsal (K–O, V) and ventral view (P–T, X); female reproductive organs (Y); and male mesotibiae in dorsal view (Z). Scale bars of A–X = 1 mm; Y = 2 mm.

FIGURE 32. External characters of Morphostenophanes species in the atavus-group: M. atavus (Kaszab) (A, G–I), M. bannaensis Zhou new species (B, J–L), M. birmanicus (Kaszab) (C, M–O), M. brevigaster Zhou new species (D, P–R), M. lincangensis Zhou new species (E, S–U), and M. vietnamicus (Kaszab) (F, V–X). Male antennae in dorsal view (A–F). Male protibiae in dorsal view (G, J, M, P, S, V), mesotibiae in ventral view (H, K, N, Q, T, W) and metatibiae in dorsal view (I, L, O, R, U, S). Scale bars = 2 mm.

FIGURE 33. Anatomic structures of Morphostenophanes species in the atavus-group: M. atavus (Kaszab) (A, G), M. bannaensis Zhou new species (B, H), M. birmanicus (Kaszab) (C, I), M. brevigaster Zhou new species (D, J), M. lincangensis Zhou new species (E, K), and M. vietnamicus (Kaszab) (F, L). Aedeagi (A–F) and male sternites VIII (G–L); in dorsal view (d), lateral view (l), and enlargements of parameres apices (p). Scale bars = 1 mm; all parameres apices not to scale.