Morphostenophanes furvus weishanus Zhou

Zhou, De-Yao, 2020, A revision of the genus Morphostenophanes Pic, 1925 (Coleoptera, Tenebrionidae, Stenochiinae, Cnodalonini), Zootaxa 4769 (1), pp. 1-81 : 62-63

Morphostenophanes furvus weishanus Zhou , new subspecies ẈŖẎȐAEƤṘƜdzď

( Figs. 38 A–D; 39D, H, L, P; 40D, S–U; 41D, H, I, J, K)

Type materials. CHINA: Yunnan: ♂ (Holotype, SNUC), Dali Prefecture, Weishan County, Mount Weibao , 2450– 2580 m, 2017.vii.7, Wen-Xuan Bi .

Paratypes (9♂♂, 14♀♀): CHINA: Yunnan : 1♀ ( SNUC) , 1♂, 1♀ ( CZDY) , 3♂♂, 9♀♀ ( CBWX, a sample of muscle tissue was preserved in 99.7% ethanol at –18 °C in CZDY), Dali Prefecture, Weishan County, Mount Weibao , 2450–2580 m, 2017.vii.7, Wen-Xuan Bi ; 5♂♂, 2♀♀ ( CBWX) , Dali Prefecture, Weishan County, Mount Weibao , 2400–2500 m, 2015.viii.16–18, Wen-Xuan Bi ; 1♀ ( CZDY, a sample of muscle tissue was preserved in 99.7% ethanol at –18 °C), Dali Prefecture, Weishan County, Ma’anshan Country , 25°19’59.67”N, 100°3’13.91”E, 2019.I, Zhi-Wei Dong .

Diagnostic description. Male ( Fig. 38A, C ). Greyish-black, shagreened; antennae and claws reddish brown. Body elongate, length 20.6–23.2 mm, width 7.5–8.3 mm, strongly convex. Head ( Fig. 39E, J ) with slightly smaller eyes, frontoclypeal suture less deeply U-shaped, width-length ratio of clypeus about 2.00; OI = 51.6–51.9. Antennae ( Fig. 40D ) slender, reaching basal third of elytra, with antennomeres weakly thickened to apices; relative lengths of antennomeres: 0.68: 0.34: 1.19: 1.10: 1.24: 1.28: 1.28: 1.19: 1.09: 1.02: 1.09. Pronotum ( Fig. 39L ) barrel-shaped, usually broader, sometimes nearly rounded, PW/PL = PW/PL = 1.21–1.23, lateral marginal borders thiner, visible in dorsal view along anterior third. Elytra elongate oval, EL/EW = 1.83–1.89. Protibiae ( Fig. 40S ) more markedly curved, pubescent of inner margins more developed and denser.

Female ( Fig. 38B, D ) distinctly stouter, length 19.4–23.3 mm. Distance between eyes wider, OI = 53.8–54.3, PW/PL = 1.18–1.26; elytra more convex, EL/EW = 1.60–1.64.

Variation. Some males have more roundly produced pronotal lateral margins; male spicula gastrale occasionally curving dorsally ( Fig. 41J ).

Comparative notes. Morphostenophanes furvus weishanus can be easily distinguished from the nominate subspecies by its much broader and more rounded male pronotum, and stouter female elytra.

Distribution. ( Map 1 ) CHINA: Yunnan.

Etymology. The new subspecies is named after the locality the type series collected from, Weishan County.

Figures

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

FIGURE 38. Habitus of Morphostenophanes furvus weishanus Zhou new subspecies. Male (A, C), and female (B, D); in dorsal (A, B), and lateral view (C, D). 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.