Kyphopteryx yangi Du & Chen, 2019

Du, Yu-Zhou & Chen, Zhi-Teng, 2019, Review of the rare and little-known Chinese species of the family Taeniopterygidae (Plecoptera), with description of two new species of Kyphopteryx, Zootaxa 4550 (1), pp. 129-134 : 131

Kyphopteryx yangi Du & Chen , sp. nov.

Figs. 2–9 .

Male. Body length 11.0 mm, forewings length 9.0 mm, hindwings length 8.0 mm. General color pale to dark brown. Head rounded, slightly wider than pronotum; paired ocelli and compound eyes pale (in ethanol); antennae brown and slender. Pronotum quadrate, bearing scattered rugosities ( Figs. 2–3 ). Wings hyaline, veins brown. Forewing mottled, with seven costal cross-veins between h and end of Sc, two cross-veins between ScP and RA, and two cross-veins between RA and RP; RP with three branches; M forked; CuA with four complete branches; CuP simple; AA1 curved basally; AA2 forked ( Fig. 4 ). Hindwing subtriangular, with three costal cross-veins between h and end of Sc, one cross-vein between ScP and RA, and one cross-vein between RA and RP; RP with three branches; six anal veins present ( Fig. 4 ). Coxae and femur dark brown, tibiae banded, tarsi pale ( Fig. 2 ).

Abdominal tergum 2 with an elevated median process, the conical process strongly sclerotized and back curved with a spinose apex; posterior half of abdominal tergum 2 rugate and membranous ( Fig. 5 ). Posterior margin of abdominal tergum 3 slightly elevated, spiny and strongly sclerotized; the process near parallel-sided and slightly widened medially from dorsal view ( Fig. 5 ). Abdominal tergum 9 extended laterally. Abdominal tergum 10 cleft, with a pair of elevated hairy lobes resembling breasts, pointing forward ( Fig. 6 ). Basal plate of the epiproct separated, medially enclosing the sclerotized basal bulb ( Figs. 6–7 ). Epiproct erected basally, apically with an oval, hollow and mostly membranous bulb; anterior apex of epiproct sclerotized, with a pair of incurved, finger-shaped lobes ( Figs. 6–8 ). Upper member of paraprocts strongly sclerotized and curved forward; lower member of paraprocts asymmetric, membranous and very complex ( Figs. 6–7 ). Cercus five-segmented, with a slightly sclerotized, swollen basal process, the process back curved with small granules; apex of cercus with a stout sclerite ( Figs. 6–8 ). Subgenital plate large and scoop-shaped, upcurved and apically with a sclerotized, tongue-shaped process ( Figs. 7–9 ).

Female. Unknown.

Type material. Holotype male, China: Yunnan Province, Deqin County, Baima Snow Mountain , 4750 m, 23 February 1987, Da-Rong Yang . Paratype: 1 male, same data as holotype .

Etymology. The species is named for Da-Rong Yang, who collected the types.

Remarks. The new species can be easily distinguished from congeners by the breast-shaped hemitergal processes of abdominal tergum 10, and by the oval, apically bifurcated epiproct. The membranous paraproct structure of the brachypterines are too complex to make informative descriptions, thus further comparative studies are needed.

Figures

FIGURE 2–9. Kyphopteryx yangi, sp. nov. 2. Male habitus, dorsal view; 3. Male head and pronotum, dorsal view; 4. Right forewing and right hindwing, dorsal view; 5. Processes of male abdominal terga 2–3; 6. Male terminalia, dorsal view; 7. Male terminalia, dorsal view; 8. Male terminalia, lateral view; 9. Male terminalia, ventral view.