Morphostenophanes chongli glaber Zhou

Zhou, De-Yao, 2020, A revision of the genus Morphostenophanes Pic, 1925 (Coleoptera, Tenebrionidae, Stenochiinae, Cnodalonini), Zootaxa 4769 (1), pp. 1-81 : 31-34

Morphostenophanes chongli glaber Zhou , new subspecies ẊṖẎȐAEƤŘṈƜdzď

( Figs. 15 A–D; 17N, S; 18K; 20K)

Type materials. CHINA: Yunnan: ♂ (Holotype, SNUC) , Honghe Prefecture, Lüchun County, Huanglianshan Nature Reserve , 2018.v.20, Chao-Ming Chen. Paratypes (5♂♂, 11♀♀) : CHINA: Yunnan: 1♀ ( SNUC) , 1♀ ( CZBS) , Honghe Prefecture, Lüchun County, Huanglianshan Nature Reserve , 2018.v.20, Chao-Ming Chen; 2♀♀ ( CZDY, two samples each including muscle tissue and eggs were preserved in 99.7% ethanol at –18 °C) , Huanglianshan Nature Reserve, Yakou station , 1900m, light trap, 2018.vi.13, Hao Huang; 1♂, 1♀ ( CZDY) , 3♂♂, 5♀♀ ( CBWX) Honghe Prefecture, Lüchun County, Huanglianshan Nature Reserve , 2019.viii.26–28, Wen-Xuan Bi; 1♀ ( CWC) , Honghe Prefecture, Lüchun County, Huanglianshan Nature Reserve , 1800–1900 m, 2019.viii.27, Chao Wu. VIET- NAM: 1♂ ( CZJZ) Mount Sapa , 2019.vi, native collector .

Diagnostic description. Male ( Fig. 15A, C ). Color coppery, prosternum dark green, antennae, mouthparts and tarsi dark brown, claws reddish brown. Body elongate, length 18.2–22.2 mm, width 6.5–7.6 mm, strongly convex dorsally. Cephalic punctures shallower, OI = 48.5–50.9. Antennae ( Fig. 18K ) much longer, reaching basal third of elytra; antennomeres more elongate, relative lengths of antennomeres: 0.75: 0.36: 1.21: 1.05: 1.28: 1.33: 1.29: 1.22: 1.22: 1.17: 1.36. Pronotum ( Fig. 17N ) quadrate, PW/PL = 1.04, widest in anterior 2/7, anterior margin projecting in middle, with thin marginal border, becoming thinner towards middle; lateral margins nearly straight, lateral marginal borders thin, visible in dorsal view along anterior third; posterior margin feebly emarginate, posterior marginal border marked; anterior angles rounded, weakly projecting forwards; posterior angles obtuse; disc moderately convex, with shallower punctures, presenting a pair of rounded impressions in anterior third, and a pair of shallower impressions near anterior fifth. Elytra ovate, EL/EW = 1.80–1.88.

Aedeagus ( Fig. 20K ) elongate, basal piece longer, and much strongly curved in lateral view; parameres 0.23 as long as total length. Apical lobes of sternite VIII hooked.

Female ( Fig. 15B, D ). Stouter than male, length 20.1–23.3 mm; elytra more convex; pronotum wider; abdomen straight in lateral view; without impressions on sternites. OI = 54.5, PW/PL = 1.09–1.18, EL/EW = 1.60–1.63.

Comparative notes. Morphostenophanes chongli glaber can be easily distinguished from the nominate subspecies by lighter body color, more slender antennae, shallower punctures on head and pronotum,a pair of extra shallow impressions on anterior fifth of pronotum, and much strongly curved aedeagus.

Comments. Morphostenophanes chongli glaber occurs in Huanglian Mountain at an altitude near 1900 meters, while the nominate subspecies distributed in Ailao Mountains at an altitude over 2300 meters. The two mountains are separated by several low altitude valleys, which must have also isolated these two populations, and caused differentiation.

Distribution. ( Map 1 ) CHINA: Yunnan; North VIETNAM.

Etymology. The new subspecies is named from the Latin epithet ‘glaber’, referring its relatively smooth head and pronotum.

Figures

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

FIGURE 15. Habitus of Morphostenophanes chongli glaber Zhou new subspecies. Male (A, C), and female (B, D); in dorsal (A, B), and lateral view (C, D). Scale bars = 5 mm.

FIGURE 17. Male prothoraces of Morphostenophanes species in the aenescens- and chongli-group: M. cuproviridis Gao & Ren (A, F), M. curvitibialis Zhou new species (B, G), M. iridescens Zhou new species (C, H), M. luoxiaoshanus Zhou new species (D, I), M. papillatus Kaszab (E, J), M. purpurascens Zhou new species (K, P), M. aenescens yelang Zhou new subspecies (L, Q), M. chongli Zhou new species (M, R), M. chongli glaber Zhou new subspecies (N, S), M. aenescens Pic (O, T) and M. yunnanus Zhou new species (S, T); in dorsal view (A–N, K–O, U, d), and in ventral view (F–J, P–T, v). Scale bars of A–N, P–S = 1 mm; O, T, U not to scale. Abbreviations of M. aenescens: XsD, Xishan District; FyC, Fuyuan County. Abbreviations of M. yunnanus habitats expounded as in Map 2, except CDll, Central Dali population; CDls, small individual of Central Dali population.

FIGURE 18. External characters of Morphostenophanes species in the aenescens- and chongli-group: M. aenescens Pic (A, L–N), M. cuproviridis Gao & Ren (B, O–Q), M. curvitibialis Zhou new species (C, R–T), M. iridescens Zhou new species (D, U–W), M. luoxiaoshanus Zhou new species (E, X–Z), M. papillatus Kaszab (F), M. purpurascens Zhou new species (G, Gv), M. aenescens yelang Zhou new subspecies (H), M. chongli Zhou new species (I), and M. yunnanus Zhou new species (J), and M. chongli glaber Zhou new subspecies (K). Male antennae in dorsal view (A–K), a variation of antennomere XI (Gv). Male protibiae, in dorsal view (L, O, R, U, X); mesotibiae, in ventral view (M, P, S, V, Y); and metatibiae, in dorsal view (N, Q, T, W, Z). Scale bars of A–K = 2 mm; L–Z = 1 mm. Full meaning of all abbreviations standing for M. yunnanus habitats expounded as in Map 2.

FIGURE 20. Anatomic structures of Morphostenophanes species in the aenescens- and chongli-group: M. aenescens Pic (A, L), M. cuproviridis Gao & Ren (B, M), M. curvitibialis Zhou new species (C, N), M. iridescens Zhou new species (D, O), M. luoxiaoshanus Zhou new species (E, P), M. papillatus Kaszab (F, Q), M. purpurascens Zhou new species (G, R, V), M. aenescens yelang Zhou new subspecies (H, S), M. yunnanus Zhou new species from the type locality (I, T, W), M. chongli Zhou new species (J, U) and M. chongli glaber Zhou new subspecies (K). Aedeagi (A–K), male sternites VIII (L–U), and female reproductive organs (V, W); in dorsal view (d), lateral view (l), and enlargements of parameres apices (p). Scale bars of A–U= 1 mm; V–W = 2 mm; all parameres apices not to scale. Abbreviations: al, apical lobes of parameres.