Indonemoura curvicornia Wang & Du

Wang, Zhi-Jie & Du, Yu-Zhou, 2009, Four new species of the genus Indonemoura (Plecoptera: Nemouridae) from China, Zootaxa 1976, pp. 56-62 : 59

Indonemoura curvicornia Wang & Du , sp. nov.

( Figs. 15–21 )

Diagnois. This species is characterized by an epiproct whose length is 4X its width and by its paraprocts having a long, heavily sclerotized outer lobe projection that curves like a horn medially and then dorsolaterally, towering over all the processes of other lobes.

Male. Forewing length 7.5, 7.6 mm, hind wing length 6.4, 6.5 mm. Head and antennae brown, pronotum slightly brown, subquadrate, angles bluntly rounded. Wings subhyaline, pale brown with brown veins. Legs brown Tergum 9 with a small crescent-shaped sclerotized bar near mid-anterior margin, and bearing several small spines near posterior margin. Tergum 10 slightly sclerotized with mid-anterior margin darkly sclerotized. Hypoproct long, broad basally, tapering to a narrow, long tip, apex armed with five strong spines. Vesicle slender, length 3X width. Paraprocts divided into 3 lobes; inner lobe slender, slightly sclerotized with an acute tip. Median lobe broad basally, mostly membranous and branched into two portions; inner portion membranous, a little longer than inner lobe; outer portion darkly sclerotized, forming a long, thin, sclerotized bar, a little longer than inner membranous portion. Outer lobe of paraproct darkly sclerotized, much longer than median lobe, and pointed outward like a long horn, a small projection near mid-point, basal part elongate and recurved dorsally alongside cerci. Epiproct long and narrow, apex extends to anterior of tergum 9; dorsal sclerite dark, two ridges raised in lateral view; narrow and thin lateral arms distinctly sclerotized; ventral sclerite sclerotized, broad basally, tapering to a narrow tip, forming a long, narrow keel that bears a row of tiny, black, ventral spines on the anterior part of the keel and a row of ventral spines near each side.

Female. Unknown.

Type material. Holotype, male, 5th Gloriette to 7th Gloriette, Tianmu Mountain, Zhejiang province, 30°18' N, 119°24' E, 9 May 1998, Leg. DU Yu-Zhou. Paratypes, male, same data as the holotype; male, 1th Gloriette, Tianmu Mountain, Zhejiang province, 30°18' N, 119°24' E, 9 May 1998, Leg. DU Yu-Zhou; 1male, 3th Gloriette to 5th Gloriette, Tianmu Mountain, Zhejiang province, 30°18' N, 119°24' E, 9 May 1998, Leg. DU Yu- Zhou; male, Tianmu Mountain, Zhejiang province, 30°18' N, 119°24' E, 9 May 1998, Leg. XIA Wei-Zheng; 3malemale, Longwang Mountain, Zhejiang province, 30°38' N, 119°38' E, 380-520 m, 2–4 Oct. 2004, Leg. WANG Zhi-Jie & LU Yan-Yang.

Etymology. The name refers to the long, outer, horn-shaped, paraproct lobe. The Latin “ curvicornia ” meaning with curved horn.

Remarks. This new species is superficially similar to I. trilongispina in the dorsal aspect of the long and narrow epiproct. However, the new species can be separated from I. trilongispina by its long, curved outer lobe being much longer than its inner lobe. The outer lobe of I. trilongispina is slightly shorter than its inner lobe.

Figures

FIGURES 15 – 21. Indonemoura curvicornia Wang & Du, sp. nov. 15. Male terminalia, dorsal; 16. Male terminalia, ventral; 17. Male terminalia, lateral; 18. Male paraproct (left); 19. Male epiproct, dorsal; 20. Male epiproct, ventral; 21. Male epiproct, lateral.