Indonemoura masuensis Li & Yang, 2005

Li, Weihai & Yang, Ding, 2005, Two new species of Indonemoura (Plecoptera: Nemouridae) from Fujian, China, Zootaxa 1001 (1), pp. 59-63 : 61-62

Indonemoura masuensis Li & Yang , sp. nov.

( Figs. 6–10 )

Diagnosis. Tergum 9 with a row of large spines at hind margin. Epiproct with dorsal sclerite bearing two groups of large, black spines, with small concavity medially and curved downward apically. Outer lobe of paraproct strongly sclerotized with beak­shaped apex.

Male. Body length 4.4 mm; forewing length 7.5 mm, hindwing length 6.3 mm. Head and compound eyes dark brown, antennae yellowish, mouthparts brown. Thorax yellow. Legs yellowish. Wings hyaline. Abdomen brownish and cerci brown; hairs on abdomen mostly pale.

Terminalia ( Figs. 6–10 ): Tergum 9 weakly sclerotized, with a row of large spines at posterior margin. Sternum 9 with claviform vesicle; subgenital plate basally wide, then distinctly tapering toward tip. Tergum 10 weakly sclerotized, with hind margin mostly sclerotized and with two groups of tiny spines at middle. Cercus longer than wide, slightly sclerotized and constricted medially. Epiproct broad at base, extending to a narrowed, rhombic tip, curved downward apically; dorsal sclerite bearing two groups of black spines, with small concavity medially; ventral sclerite strongly sclerotized, broad at base and becoming narrower toward apex, expanded ventrally into keel­shaped ridge with many black spines. Paraproct divided into three lobes: outer lobe distinctly sclerotized with beak­shaped tip, slightly extended beyond median lobe; median lobe slightly sclerotized, broad at base and gradually tapering toward apex, adhering to outer lobe laterally; inner lobe sclerotized, with pointed tip, shorter than median lobe.

Female. Unknown.

Type Material. Holotype 1 male, CHINA: Fujian, Wuyi Mountain, Masu , 2004. V. 5, X.Y. Liu.

Distribution. China (Fujian).

Etymology. The specific name refers to its type locality.

Remarks. The new species is easily distinguished from the other species of the genus Indonemoura by the epiproct with the rhombic tip curved downward and dorsal sclerite of the epiproct with two groups of spines and small concavity. In the other known species of the genus, the epiproct is always long and narrow and the dorsal sclerite of the epiproct does not have two groups of spines.

Figures

FIGURES 6­10. Indonemoura masuensis sp. nov. (male). 6. Genitalia, dorsal view. 7. Genitalia, ventral view. 8. Epiproct, posterior view. 9. Epiproct, lateral view. 10. Right paraproct. o=outer lobe, i=inner lobe, m=median lobe.