Siniassus nigrimaculatus, Yang & Dai, 2022

Yang, Hui-Ying & Dai, Ren-Huai, 2022, Description of two new species of the genus Siniassus (Hemiptera: Cicadellidae: Iassinae: Hyalojassini) from China, Zootaxa 5093 (1), pp. 75-82 : 78

Siniassus nigrimaculatus sp. nov.

Figs. 3, 4, 16–26.

Measurement. Body length (including tegmen): ♂, 6.1–6.3 mm.

Description. Color pattern of anterior dorsum and face as in Figs.3, 4, 16–18. Body dark brown. Eyes russet. Ocelli pale red. Pronotum brown with prominent transverse wrinkles, with irregular black spots and dark brown longitudinal line posteromedially. Mesonotum and scutellum stramineous. Forewings yellowish-brown. Legs dark green. Width between eyes nearly 7 times median length of crown, coronal suture indistinct. Distance from ocellus from eye is about 2.2 times its diameter. Hind femur macrosetal formula 2+2+1 or 3+2+1.

Male genitalia. Pygofer side ship-shaped in lateral aspect with apex acutely angled ( Figs. 19 ), with several macrosetae on caudo-dorsal margin and many short setae near caudo-ventral margin ( Figs. 20 ). Subgenital plate short, apex rounded, with lateral marginal setae ( Fig. 22 ). Style long, apophysis approximately curved at right angle and narrowed gradually to apex ( Fig. 23 ). Aedeagal apodeme indistinct in frontal view ( Fig. 21 ). Aedeagus compressed, shaft slender in ventral aspect, apex slightly expanded and bilobed; in lateral view crescent-shaped, with 6 lateral spicules. Gonopore, near apex ( Figs. 24–26 ).

Female unknown.

Type Material. Holotype: 1♂, China: Sichuan province, Luding city (102° 23′ 50″ E, 29° 54′ 28″ N), 13 August 2015, collected by Yanbin. Paratypes: 1♂, China: Hainan province, Diaoluoshan (110° 03′ 43″ E, 29° 30′ 30″N), 4 May 2021, collected by Li Fenge.

Remarks. The new species is similar to S. aspinus , but can be distinguished from the later by the pygofer with several macrosetae on caudo-dorsal margin and style narrowed gradually to apex.

Etymology. The new species name is derived from the Latin prefix “nigri-” (black) and word “maculatus” (maculated), referring to the irregular black markings on the pronotum.

Distribution. China (Sichuan province, Hainan province). ( Fig. 40 ).

Figures

FIGURES 40. Geographical distribution of Siniassus.

FIGURES 16–26. Siniassus nigrimaculatus sp. nov. ♂ 16. Head and thorax, dorsal view; 17. Head and thorax, lateral view; 18. Head and thorax, ventral view; 19. Male pygofer side, lateral view; 20. Male pygofer side, caudal view; 21. Male pygofer, frontal view; 22. Subgenital plate, ventral view; 23. Style, lateral view; 24. Aedeagus, lateral view; 25. Aedeagus, ventral view; 26. Magnified view of base of aedeagal shaft, dorsal view. Scale bars =1.0 mm.