Suwallia wolongshana Du & Chen

Chen, Zhi-Teng & Du, Yu-Zhou, 2015, A new species of Suwallia (Plecoptera: Chloroperlidae) from China, Zootaxa 4018 (2), pp. 297-300 : 297-299

Suwallia wolongshana Du & Chen , sp. nov.

Figs. 1–8 .

Adult habitus. Triocellate. General color pale yellow in alcohol. Head pale yellowish-white or yellowish-brown; compound eyes and ocelli black with a long ovoid brown spot from ocellar to the frontoclypeal area; antennae pale yellow or pale brown, covered with dark brown setae ( Figs. 1, 7–8 ). Pronotum disc dark brown, meso- and metanota with dark brown U-shaped markings; wings hyaline; legs pale yellowish-brown. Abdominal terga 1–8 with a medial wide stripe ( Figs. 7, 8 ). Cerci pale yellowish-white or yellowish-brown with long brown setae.

Male ( Figs. 1–3, 5–7 ). Forewing length 7.0– 7.5 mm, hindwing length 5.5–6.0 mm. Terga 1–8 with a brown, wide longitudinal stripe; dorsolaterally bearing long hairs ( Fig. 7 ). Tergum 10 medially with a concave area bearing two wide sclerotized bands ( Figs. 2, 3 ). Hemitergal processes thin, finger-shaped, curved forward, apex acute. Epiproct reduced to a small membranous lobe ( Fig. 3 ). Distinct subgenital plate arising from tergum 9 to tip of the abdomen, swollen at tip. Aedeagus membranous, subelliptical in shape with a small lobe ( Figs. 5, 6 ).

Female. Forewing length 8.5–9.0 mm. General color similar to male. Abdominal segments 1–8 with median abdominal brown strip ( Fig. 8 ). Ventrally without dark markings. Posterior margin of the subgenital plate broadly rounded ( Fig. 4 ).

FIGURE 1–8 . (Continued)

Type material. Holotype: male, China: Sichuan Province, Wolongshan, 2,100 m, VIII.16.1994, Yu-Zhou Du. Paratypes, 2 males and 1 female, same data as holotype.

Etymology. The species is named after the type locality, Wolongshan.

Diagnosis. The new species is most similar to S. decolorata , but can be easily distinguished in the male by the two distinct sclerotized dark bands between the hemitergal processes. The male of S. decolorata has a T-shaped sclerotized area (see fig. 24 in Zhiltzova & Levanidova 1978). The female of S. wolongshana can be distinguished from S. decolorata by the shorter subgenital plate (see fig. 25 in Zhiltzova & Levanidova 1978).

Figures

FIGURES 1 – 8. Suwallia wolongshana, sp. nov. 1. Head and pronotum, dorsal view; 2 – 3. Male terminalia, dorsal view; 4. Female terminalia, ventral view; 5. Aedeagus, ventral view; 6. Aedeagus, lateral view; 7. Male habitus, dorsal view; 8. Female habitus, dorsal view.