Sphaeronemoura kunmingensis Qian & Du, 2019

Qian, Yu-Han, Fu, Li, Jiao, Jun-Ying & Du, Yu-Zhou, 2019, Two new species of Sphaeronemoura (Plecoptera: Nemouridae) from Yunnan Province of China, Zootaxa 4568 (1), pp. 194-200 : 194-195

Sphaeronemoura kunmingensis Qian & Du sp. nov.

( Figs. 1–12 )

Adult habitus. A large sized species, macropterous. Head dark brown, antennae and palpi dark brown. Pronotum trapezoid, slightly paler, wider than long, rugosities scattered. Leg dark brown, except femora and tibiae with wide yellowish bands. Wings dark brown, venation dark brown ( Figs. 1–2 ).

Male. Tergite 8 with dark brown median lobe overhanging the tergite 9 and bilobed in posterior ( Figs. 3, 5, 6 ). Tergite 9 sclerotized laterally, medial membranous field that partly covered with some hair ( Figs. 3, 6 ). Hypoproct of sternite 9 small and rounded, apical projection tapering and upcurved, blunt tip; vesicle elliptical and medial field membranous ( Fig. 4 ). Tergite 10 with strong hair, medial of this segment has a T-shaped membranous field ( Figs. 3, 6, 7 ), beneath the apex of epiproct with a concave area and both sides of the concave area with two blunt protuberances ( Figs. 7 , 10 ) Paraproct inner lobe strong sclerotized, apex bifurcate and pointed; median lobe fingerlike and also strong sclerotized, apex blunt, longer than the inner lobe; the outer lobe sclerotized, forming a slender sclerite strip curved from cercal base to median lobe, one end of the sclerite pointed, the other end membranous and expanded ( Figs. 4 , 11 ). Epiproct curled upward, apex expanded into two hemispherical in lateral view and with tiny spines ( Figs. 6, 7, 8 , 10 ); nearly trapezoidal with apex constricted in dorsal view, apex indented medially ( Figs. 3, 5 , 12 ). Dorsal sclerite more sclerotized laterally ( Figs. 3, 5 , 12 ); ventral sclerite with three tiny spines ( Fig. 10 ); flagellum short, upward and tip pointed in lateral view, base of flagellum dark brown ( Figs. 6 , 10, 12 ). Cercus long and with dense hair, conical and end blunt, slightly curved inward ( Figs. 3, 5, 6 ).

Female. Pregenital plate on sternum 7, nearly trapezoid and dark brown, covering most of sternite 7, posteriorly with two short triangular lobes, dark brown, overhanging the anterior margin of sternum 8. Subgenital plate light brown, small, rectangular and all angles rounded; the sclerotized portions of the vaginal lobes with two brown fang-shaped sclerites protruding between the lateral of the subgenital plate. Sternite 9 dark brown, with a little membranous indentation on the middle of the anterior margin.

Type material. Holotype male, CHINA: Yunnan Province, Kunming City, Jindian, Huanglongqing , 25°5’42” N, 102°49’19” E, 2100 m, 18 Nov. 2017, Leg. Yu-Han Qian, Qian Xiao, Ming-Xue Xie ( ICSFU) . Paratypes: 4 males and 5 females, same data as holotype ( ICSFU) .

Etymology. The Latin name “ kunmingensis ” refers to the first nemourid stoneflies collected from the vicinity of Kunming, the capital and largest city of Yunnan Province.

Remarks. The new species appears to be related to five other Chinese species and a Thai species. They are S. asymmetria Li, Yang & Yang, 2016 from Guizhou Province, S. separata Li, Murányi & Yang, 2014 from Henan Province, S. plutonis ( Banks, 1937) and S. formosana Shimizu & Sivec, 2001 from Taiwan, S. songshana Li & Yang, 2009 from Beijing, and S. inthanonica Shimizu & Sivec, 2001 from Thailand, sharing an approximate protruding lobe of tergite 8. However, the distinct inner lobe and median lobe of paraprocts readily distinguishes S. kunmingensis from S. asymmetria , S. separata and S. plutonis , the protruding lobe of tergite 8 often slightly expanded posteriorly in S. formosana and S. songshana has a rectangle-shaped protruding lobe, protruding lobe of the new species differs from them. In addition, the obviously different flagellum of the epiproct of S. kunmingensis is diagnostic for S. inthanonica and for the above-mentioned five Chinese species. The females of S. kunmingensis has a similar pregenital plate as S. separata , S. plutonis , S. formosana , S. songshana , and S. inthanonica , but the subgenital plate of the new species is smaller and more rectangular and the sclerotized portions of the vaginal lobes with two brown fang-shaped sclerites protruding laterally.

Figures

FIGURES 1–2. Sphaeronemoura kunmingensis, sp. nov. 1. Female and Male habitus, dorsal view. 2. Cervical gills, ventral view.

FIGURES 3–9. Sphaeronemoura kunmingensis, sp. nov. 3. Male terminalia, dorsal view. 4. Male terminalia, ventral view. 5. Male terminalia, caudal view. 6. Male terminalia, lateral view. 7. Male T10 and flagellum, lateral view. 8. Male epiproct, lateral view. 9. Female terminalia, ventral view.

FIGURES 10–12. Sphaeronemoura kunmingensis, sp. nov. 10. Blunt prominent and epiproct, lateral view. 11. Male right paraproct, caudal view. 12. Male epiproct, dorsal view.