Indonemoura guangxiensis Li and Yang

Li, Weihai, Yang, Ding & Sivec, Ignac, 2005, Two new species of Indonemoura (Plecoptera: Nemouridae) from China, Zootaxa 893, pp. 1-5 : 1-3

publication ID 10.5281/zenodo.170937


persistent identifier

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scientific name

Indonemoura guangxiensis Li and Yang

sp. nov.

Indonemoura guangxiensis Li and Yang , sp. nov.

( Figs. 1–6 View FIGURES 1 – 6 )

Diagnosis. Dorsal sclerite of epiproct with a pair of heavily sclerotized strips at lateral margins. Median lobe of paraproct bifurcated into a wide tip with three black spines medially.

Adult. Male body length 3.5 mm; forewing length 5.0 mm, hindwing length 4.0 mm. Female body length 4.5–4.8 mm, forewing 6.0– 6.3 mm, hindwing 5.0– 5.3 mm. Head dark; antennae dark brown; mouthparts yellow. Thorax and pronotum dark brown. Wings hyaline. Legs brown, femora darker brown distally. Abdomen yellow; hypopygium including cerci brown; hairs on abdomen mostly pale.

Male genitalia. ( Figs. 1–5 View FIGURES 1 – 6 ): Tergum 9 distinctly sclerotized posteriorly, weakly sclerotized anteriorly, with a triangular mid­anterior incision, and with two groups of several tiny black spines and long hairs at mid­posterior margin. Sternum 9 with slender vesicle; hypoproct wide basally, then distinctly tapering toward tip. Tergum 10 weakly sclerotized anteriorly, strongly sclerotized posteriorly, with a large median concavity bearing several tiny black spines closely set at mid­lateral margin. Cercus slightly sclerotized, nearly cylindrical. Epiproct long and curved anteriorly, dorsal sclerite with a pair of heavily sclerotized lateral margins; ventral sclerite strongly sclerotized, produced ventrally into a ridge with several tiny spines. Paraproct divided into three lobes: outer lobe distinctly sclerotized, abruptly curved dorsally, with a large, forked spine apically; median lobe sclerotized, strongly curved anterodorsally, with a wide, bifurcated tip, bearing three black spines; subtriangular inner lobe weakly sclerotized, shorter than outer and median lobes.

Female genitalia. ( Fig. 6 View FIGURES 1 – 6 ): Sternum 7 produced into a pentagonal, sclerotized pregenital plate, its blunt posterior margin reaching the middle of sternum 8. Subgenital plate subquadrate and expanded postero­laterally. Sternum 8 with four transverse sclerotized areas at posterior margin (two lateral ones short and straight, two median ones long and slightly bent). Cercus cylindrical.

Type Material. Holotype male (preserved in 75 % alcohol): Guangxi, Maoershan National Nature Reserve, 2003. VI. 30, Xingyue Liu. Paratypes, three females, same data as holotype. Types deposited in the Entomological Museum of China Agricultural University, Beijing.

Etymology. The species is named after its type locality, Guangxi.

Remarks. This species seems to be related to I. nohirae ( Shimizu, 1994) in the overall shape of the epiproct, but can be distinguished from the latter by the dorsal sclerite with long sclerotized strips and the arrangement of spines on the paraproct.