Traiguma nasuta Distant, 1908

Viraktamath, C. A. & Yeshwanth, H. M., 2023, Leafhopper subfamily Hylicinae (Hemiptera: Auchenorrhyncha: Cicadellidae) in the Indian subcontinent with description of new species, Zootaxa 5319 (4), pp. 451-500 : 475-497

Traiguma nasuta Distant

Figs 4A–D , 7G–J , 10D–E , 12J , 25A–I , 26A–I

Diagnosis. Crown narrowed in front of eyes and then expanded triangularly, without median ridge dorsally. Male abdominal tergites III–V with median broad yellow patches ( Fig. 12J ). Male pygofer lobes about 1.6× as long as their greatest width in lateral view. Male style with apex of apophysis sclerotized and hooked. Aedeagus with basal angular projection on ventral surface of shaft ( Figs 25I , 26I ).

Material examined. INDIA: Tamil Nadu: LECTOTYE ♀, “Nilgiri, Hampson”, “ Traiguma nasuta Dist. Type ” “Distant Coll. 1911-383” ( BMNH) . INDIA: Tamil Nadu: 1♁, Naduvattam , 1829m, 6.vi.1977, C.A. Viraktamath ( UASB) .

Remarks. One male specimen from Thai Sola (Nilgiri Hills) slightly differs from the male specimen illustrated by Viraktamath & Webb (1991) in having the anterior projection of head more depressed and rounded (in the typical specimen it is triangular and flat), male pygofer lobes more expanded near the base and with slightly sinuate posterior margins (in T. nasuta not convexly rounded at base and the posterior margin almost straight), the connective comparatively much wider distally and the aedeagus much more widely rounded with the ventral process more basal compared to the male specimen illustrated by Viraktamath & Webb (991). However, these differences are treated here as intraspecific variations.

Viraktamath & Webb adequately described and illustrated this species. T. nasuta has the male style similar to that of T. verticalis . These two species have the base of aedeagal shaft with one or more processes; in the former the process is unpaired and at the base on the ventral surface medially and in the latter the processes are paired and on the dorsal surface. However, the species drastically differ in the shape of the crown. The third species, T nielsoni has the male crown with the anterior process upturned at a right angle and the aedeagus lacks the basal process or processes (see below).

Figures

FIGURES 4A–D. Traiguma nasuta Distant, lectotype female, habitus. A, dorsal view; B, lateral view; C, face, D, label data.

FIGURES 7A–J. Species of Hylicinae, habitus, dorsal and lateral view. A–B, Kalasha manikya sp. nov., holotype male; C–D, Sudra manipurensis sp. nov., holotype male; E–F, Sudra notanda male from Thailand, G–J Traiguma nasuta Distant, males from Naduvattam (GH) and Thai shola (IJ).

FIGURES 10A–G. Species of Hylicinae, faces. A, Kalasha confusa sp. nov.; B, Kalasha manikya sp. nov.; C, Sudra manipurensis sp. nov.; D–E, Traiguma nasuta Distant, male from Naduvattam (D) and Thai shola (E); F–G, Traiguma nielsoni Viraktamath & Webb, male (F) and female (G).

FIGURES 12A–L. Species of Hylicinae, male and female abdomen dorsal view. A, Hatigoria zhangi sp. nov.; B, Hemisudra indica sp. nov.; C–D, Hylica paradoxa Stål, male (C) and female (D); E, Hylica scutealba Tang & Zhang, male; F, Kalasha confusa sp. nov.; G, Nacolus tuberculatus (Walker); H, Sudra manipurensis sp. nov.; I, Sudra notanda Distant, male; J, Traiguma nasuta Distant, male; K, Traiguma nielsoni Viraktamath & Webb, male; L, Traiguma verticalis Distant, male.

FIGURES 25A–I. Traiguma nasuta Distant, male genitalia. A, genital capsule, lateral view; B, subgenital plates, ventral view; C–D, styles and connective, dorsal and ventral view; E, style, lateral view; F, aedeagus, connective and part of styles, dorsal view; G, aedeagal shaft apex, posterior view; H, aedeagus, dorsal view; I, aedeagus, lateral view.

FIGURES 26A–I. Traiguma nasuta Distant, male genitalia variation, male from Thai shola.A, genital capsule lateral view; B, subgenital plates, ventral view; C–D, styles and connective dorsal view and ventral view; E–F, style, lateral and dorsal view; G, aedeagal shaft, posterior view; H aedeagus, dorsal view; I, aedeagus, lateral view.