Parallygus guttatus Matsumura

Dai, Wu & Zhang, Yalin, 2012, Revision of the Oriental leafhopper genus Parallygus Melichar (Hemiptera: Cicadellidae: Deltocephalinae) with description of new species, Zootaxa 3157, pp. 41-53 : 48-49

Parallygus guttatus Matsumura (original comb. reinstated)

Figs 1 A,E, 5A–I.

Parallygus guttatus Matsumura 1914: 205 . Phlepsius guttatus, Metcalf, 1957: 558 .

Coloration as in P. divaricatus but paler, lacking facial spots and costal stripe on forewings.

Male genitalia: Pygofer triangularly produced caudally with dorsal marginal mesal plate-like lobe as in P. divaricatus ; macrosetae in caudal half and along dorsal margin at midlength area. Subgenital plates rounded with even lateral margins, anterior extension directed dorsally. Style with rounded distal margin. Connective V-shaped, dorsally directed. Aedeagus with dorsal apodeme poorly developed, base stout with one pair of filamentous unpigmented sinuate processes at base of short tubular shaft, twice as long as shaft and one pair of blade-like caudally narrowed ventral processes almost three times as long as shaft. Gonopore apical.

Female genitalia. Hind margin of seventh sternite about 3 times as long as sixth, with posterior margin medially slightly emarginate.

Measurements. Male 5.8 mm long, 1.6 mm wide across eyes and 1.7 mm wide across hind margin of pronotum. Female 6.2 long, 1.7 mm wide across eyes and 1.9 mm wide across hind margin of pronotum.

Material examined. INDIA: 1 3, Maharashtra: Matheran, 915 m, 22.xi.1977, C.A. Viraktamath ( BMNH); 1 3, Kerala: Nelliampathy, 10.v.2011, N. Meshram ( NPC); CHINA: 2 3, 1 Ƥ, Zhejiang Prov., Baishanzu Mountain, Wulingkeng, 12~ 13 August 2003, 550m, Dai Wu; 1 3, Gaungxi Prov, Pingnan, Xishan Mountain, 1959-5- 19 (ZSU); 3 Ƥ Hunan, Prov., Chenzhou, 16 July 1985, Zhang Yalin and Chai Yonghui ( NWAF).

Remarks. This species was described from Taiwan by Matsumura (1914), based on four female specimens that are deposited in Hokkaido University, Japan. Later, Metcalf (1957) transferred Parallygus guttatus Matsumura to the genus Phlepsius without explanation. Photos of type specimen of P. guttatus with label data “ Taiwan, Shirin, 31 July 1906, Nitobe I., Parallygus guttatus det. Matsumura”, are available on the website of the National Digital Archives Program/ National Museum of Natural Science (NMNS) (2011).

The identity of the male genitalia of this species is tentative as it is based on specimens from mainland China and India. This somewhat wide distribution ( Fig. 8 ) together with the similarity of these specimens to the original description and photos of P. guttatus , suggests that they are conspecific with the specimens ( P. guttatus ) from Taiwan.

This species is closely related to P. divaricatus differing only in having a straight ventral process ( Fig. 5 F) of the aedeagus compared to distally strongly curved ventral process in the latter ( Fig. 4 F).

Figures

FIGURE 1. Dorsal (A – D) and lateral (E – F) views of species of Parallygus. A, E. P. guttatus Matsumura from China; B, F. P. jiuhuaensis Dai & Zhang, sp. nov.; C, G. P. b u r m i n d i c u s Viraktamath & Webb, sp. nov.; D, H. P. rameshi Viraktamath & Webb, sp. nov.

FIGURE 4. Parallygus divaricatus Melichar. A. Male genital capsule; B. Pygofer process, ventral view; C. Connective, anteroventral view; D. Sclerotized bridge across pygofer lobes, posterior view; E. Style and connective, posterodorsal view; F. Aedeagus, lateral view. Free hand diagrams not to scale.

FIGURE 5. Parallygus guttatus Matsumura, specimen from India. A. Forewing venation; B. Male genital capsule; C. Pygofer process, dorsal view; D. Subgenital plate, lateral view; E. Style, dorsal view; F. Aedeagus, lateral view; G. Aedeagus, posteroventral view; H. Connective, anterior-ventral view; I. Subgenital plates and styles, dorsal view.

FIGURE 8. Map showing distribution of species of Parallygus in India, Sri Lanka and China.