Cryptoperla dui Sivec, 2005

Huo, Qing-Bo & Du, Yu-Zhou, 2018, Two new species of Cryptoperla (Plecoptera: Peltoperlidae) from China, with description of the nymph of Cryptoperla dui Sivec, Zootaxa 4374 (3), pp. 395-408 : 402-404

Cryptoperla dui Sivec, 2005

Figs. 11–18 .

Mature nymph: Body length approximately 10.7 mm. Head width 2.1 mm. Body general color light brown ( Figs. 11 ).

Head, brown, small and partially retracted into pronotum. Biocellate, Frontoclypeal area pale, with “V” shaped mesal dark spots; occiput with several paler stripes ( Figs. 12-13 ). Mandible and maxillae as in Figs. 14-15 . Thoracic segments wide and flat, medially with inconspicuous pale stripes ( Figs. 16-17 ). Body covered with numerous thick black-and-white setae dorsally ( Figs. 18 ). Legs stout; lateral margins of tarsi with moderate length white bristles.

Gill PSC1 absent, gill PSC2-3 single, finger-like. Each paraproct with a single gill filament; ventral apex of T10 with a similar median gill filament.

Abdomen with two rows of light spots along the outer margin of terga; T8 pale. Cerci with ca. 32 segments without specialized structures.

Material examined: 10 nymphs, Sichuan Province, China. Pingwu, Wanglang Nature Reserve. Qikeshu Stream, 2383 m, 32°9.26′N, 104°1.45′E. 2016-VII-19, legs. Du Yu-Zhou, Huo Qing-Bo.

Distribution: China: Sichuan Province, Yunnan Province.

Remarks: Cryptoperla dui is the only peltoperlid species known from Qikeshu Stream in the Wanglang Nature Reserve. The nymphs were found only in heavily canopied reaches of the stream with strong current. At the time of our collections, nymphs were absent from other nearby streams in the reserve that had little current.

Figures

FIGURE 11. Nymph of Cryptoperla dui. (A=dorsal, B=ventral).

FIGURE 12. Mature nymph of Cryptoperla dui. Head and pronotum, dorsal.

FIGURE 13. Young nymph of Cryptoperla dui. Head and pronotum, dorsal.

FIGURE 14. Nymph of Cryptoperla dui. Right mandible, dorsal.

FIGURE 15. Nymph of Cryptoperla dui. Right maxillae, dorsal.

FIGURE 16. Mature nymph of Cryptoperla dui. Thorax of younger individual, dorsal.

FIGURE 17. Young nymph of Cryptoperla dui. Thorax of older individual, dorsal.

FIGURE 18. Nymph of Cryptoperla dui. Black-and-white setae on the thorax, dorsal.