Mesonemoura tumida Qian & Du, 2019

Xiao, Qian, Zhao, Jing, Qian, Yu-Han & Du, Yu-Zhou, 2019, Two new species of Mesonemoura (Plecoptera: Nemouridae) from Yunnan Province of China, Zootaxa 4565 (4), pp. 531-538 : 534

Mesonemoura tumida Qian & Du sp. nov.

Figs.11 –18

Adult habitus. General color dark brown. Head dark brown, antennae dark brown, palpi brown. Thorax brown, pronotum trapezoid, wider than long, rugosities scattered. Leg brown, femora and tibiae have a yellowish band. Wings light brown and with some brown patch, veins dark brown. Abdomen brown. ( Fig. 11).

Male terminalia. Tergite 9 sclerotized with wide median indentation at posterior margin, indented to ½ of tergite 9, posterior edge with sparse tiny bristles, two wide short paramedial lobe-shaped perturbances reaching tergite 10, terminally with a large spine ( Fig. 12 ). Hypoproct of sternite 9 basally broad, tapering toward apex, tip blunt; vesicle elliptical and slender, medial field membranous ( Fig. 13 ). Tergite 10 strongly sclerotized, with wide shallow median indentation at anterior margin ( Fig. 12 ). Epiproct slender, basally and marginally sclerotized, median portion membranous. Flagellum short and wide, slightly sclerotized laterally, curved wave-shaped, tip wide and blunt ( Figs. 12, 14, 15 , 16). Paraproct formed by 3 lobes: inner lobe oblong and sclerotized, apex blunt in caudal view ( Fig. 15 ); median lobe strongly sclerotized, basal fused with outer lobe and medially stretched outward across outer lobe forming a beak-shaped spine; outer lobe triangular and terminal intumescent and blunt, consisting of two part, inside portion membranous with many hairs, outside portion slightly sclerotized and protruded an entirely sclerotized band, curved along the cerci. ( Figs. 12, 13, 15 , 17, 18). Cerci cylindrical, bearing many hairs ( Figs. 12–15 ).

Figures

FIGURES 12–15. Mesonemoura tumida sp. nov. 12. Male terminalia, dorsal view. 13. Male terminalia, ventral view. 14. Male terminalia, lateral view. 15. Male terminalia, caudal view.