Morphostenophanes brevigaster Zhou

Zhou, De-Yao, 2020, A revision of the genus Morphostenophanes Pic, 1925 (Coleoptera, Tenebrionidae, Stenochiinae, Cnodalonini), Zootaxa 4769 (1), pp. 1-81 : 47-48

Morphostenophanes brevigaster Zhou , new species DzDzẎȐAEƤ

( Figs. 28 A–D; 31D, I, N, S; 32D, P–R; 33D, J)

Type materials. CHINA: Yunnan: ♂ (Holotype, SNUC) , Yingjiang County, Taiping Town, Shangbangwa , ca. 800 m, 2019.i, native collector. Paratypes (16♂♂, 19♀♀) : CHINA: Yunnan: 1♀ ( SNUC) , 1♂ ( MHBU) , 1♂ ( CJQY) , Yingjiang County, Taiping Town, Mangyun , late vi, native collector; 1♀ ( CJQY) , 1♀ ( CZDY, a sample of muscle tissue was preserved in 99.7% ethanol at –18 °C) , Yingjiang County, Taiping Town , 2019. ii, native collector; 3♂ ( CZDY) , 2♂♂ ( CQL) , 1♀ ( CJQY) , Yinjiang County, Nongzhang Town , ca. 900 m, 2019.xii– 2020.i.11, native col- lector; 1♂ ( CZDY) , Yingjiang County, Xima Town, Hulukou , 1200 m, 2018. vi –vii, Wei-Zong Yang; 1♂ ( CJQY) , Yingjiang County, Xima Town, Mountain near Menglai River , 1800 m, 2019, late vi, native collector; 6♀♀ ( CBWX) , Dehong Prefecture , Longchuan County, 2000 m, 2017.vi.15–28, Wen-Xuan Bi; 1♀ ( CBWX) , Dehong Prefecture , Longchuan County, 2000–2080 m, 2018.vi. 4–8, Wen-Xuan Bi; 1♂ ( CBWX) , Tengchong City, Houqiao Town, Heinitang Village , 2000 m, 2017.ix.7–10, Xiao-Dong Yang; 1♂, 2♀♀ ( CZDY) , 1♂, 2♀♀ ( CBWX) , Tengchong City, Houqiao Town, Heinitang Village , 1850–1950 m, 2018.ix.4–6, Wen-Xuan Bi; 1♀ ( CBWX) , Tengchong City, Houqiao Town, Heinitang Village , 1850 m, 2018.ix.13 as larva, adult emerged 2018.xii.21, Wen-Xuan Bi; 1♀ ( CBWX) , Lushui County, Pianma Town, Gangfang , 2050 m, 2015.vi.10, Wen-Xuan Bi; 2♂♂, 1♀ ( CZDY) , Tengchong County, Diantan Town, Mount Yunfeng , 25°22’44.26”N, 98°24’32.40”E, 2200 m, 2016.vii.1, Zi-Chun Xiong; 1♂ ( CYM) , Yingjiang County, Taiping Town, Shangbangwa , ca. 800 m, 2019.i, native collector; 1♀ ( CYM) , Tengchong County, Diantan Town, Dadongshanhe , 25°32’10.38”N, 98°22’57.28”E, 2000 m, 2016.vii.4, Mao Ye & Zi-Chun Xiong; 1♂ ( CYM) , Yingjiang County, Sudian Country , 2000 m, 2018.viii.13, Ye Mao .

Diagnosis. Body large and stout, grayish black. Antennae long, reaching apical third of elytra; Pronotum widest in middle; elytra striate, with ratio of length to width about 1.6 in male, and about 1.5 in female; all legs slender, metafemora reaching apex of sternite VII; metatibiae weakly sinuous; apical lobes of sternite VIII broadly hooked in lateral view.

Description of male. Male ( Fig. 28A, C ). Color greyish- black, antennae, claws reddish brown, shagreened. Body stout, length 20.0– 24.5 mm, width 8.2–9.7 mm, strongly convex, noticeably constricted between pronotum and elytra.

Head ( Fig. 31D, I ) transversely subquadrate, sparsely and finely punctate, with outer margin distinctly notched between genae and clypeus; clypeus transversely hexagonal, slightly convex in middle, gently bent downwards in front, anterior margin bisinuate, 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 shallow to absent; eyes transversely reniform, strongly convex laterally; inner ocular sulci shallowly depressed along inner margins, becoming broader posteriorly; tempora moderately convex. OI = 49.1–50. Antennae ( Fig. 32D ) slender, reaching basal third of elytra, with antennomeres weakly thickened forwards, apices dilated; relative lengths of antennomeres: 0.77: 0.34: 1.28: 1.26: 1.38: 1.41: 1.34: 1.24: 1.21: 1.16: 1.24. Mentum ( Fig. 31I ) inversely trapezoidal, lateral margins weakly rounded; medial surface finely punctate, with several large pores bearing long setae, gradually rising from base to apex, depressed along both sides.

Pronotum ( Fig. 31N ) quadrate, PW/PL = 1.12–1.14, widest slightlyanterior to the midpoint, anterior margin weakly rounded, anterior marginal border thin; lateral margins weakly rounded, lateral marginal borders 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, shagreened, finely and sparsely punctate. Scutellum widely triangular, glossy, finely punctate.

Elytra fusiform, widest near middle, EL/EW = 1.61–1.64; strongly convex, highest in apical 2/5; with 9 continuous furrowed striae, 8 th ending at apical seventh of elytra, 1 st and 9 th, 2 th and 7 th convergingat ends, 4 th, 5 th successively joined 6 th at each end, 1 st and 4 th, 2 nd and 3 rd, 5 th and 6 th, and 7 th and 8 th convergingat fore-ends; intervals strongly convex, shagreened, sparsely and finely punctate.

Prosternum ( Fig. 31S ) shagreened, finely and sparsely punctate; prosternal process declivous, pointed at apex; hypomeron weakly rugulose, shagreened. Metasternum smooth, metaventral anterior process weakly wrinkled. Abdomen depressed, somewhat rough and finely punctate, sternites III and IV sulcate on both sides, sternite V depressed laterally.

Legs slender. Protibiae ( Fig. 32P ) weakly curved in apical third, apical 3/5 of inner margins pubescent; mesotibiae ( Fig. 32Q ) weakly curved in apical third, apical half of inner margins pubescent; metatibiae ( Fig. 32R ) weakly sinuous, apical 3/5 of inner margins pubescent, outer margins depressed before apices.

Aedeagus ( Fig. 33D ) elongate, curved in lateral view; parameres slender, 0.21 as long as total length, with ovoid apex. Sternite VIII ( Fig. 33J ) with apical lobes broadly hooked in lateral view.

Female ( Fig. 28B, D ). Stouter than male, length 19.8–27.8 mm. OI = 49.0, PW/PL = 1.14–1.18; elytra more convex, highest in middle, EL/EW = 1.55–1.65; abdomen straight in lateral view. Ovipositor elongated, gradually narrowing posteriorly, apex acute.

Comparative notes. M or phostenophanes brevigaster is similar to M. atavus . Detailed comparison and diagnosis is provided in the comparative notes of M. atavus .

Distribution. ( Map 1 ) CHINA: Yunnan.

Etymology. The new species is named from a combination of the Latin stem, ‘brevi’ and ‘gaster’ referring to its short elytra.

Figures

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

FIGURE 28. Habitus of Morphostenophanes brevigaster 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.