Yaontogonia unipuncta, A.Viraktamath & Yeshwanth & D.Webb, 2020

A. Viraktamath, C., Yeshwanth, H. M. & D. Webb, M., 2020, Leafhopper tribe Stegelytrini (Hemiptera: Cicadellidae: Deltocephalinae) of the Indian subcontinent, with a note on Aeternus hieroglyphicus Distant (Cicadellidae Athysanini), Zootaxa 4822 (4), pp. 551-566 : 553-554

Yaontogonia unipuncta sp. nov.

Figs 6E F I , 9 A–I.

Male coloration. Reddish brown with yellow areas. Crown yellow, posterior margin and narrow lateral margins along eyes, brown. Upper part of face with large U-shaped area medially, extreme margin of gena, yellow. Pronotum uniformly reddish brown, Mesoscutum yellow except for chocolate brown basal triangles, scutellum with reddish brown thin stripe sub-apically. Forewings reddish brown with yellow triangular spot in distal half of clavus margined by dark brown, basal half of costal margin, entire inner margin and apical cells bordered by dark brown, veins red tinged. Thoracic pleura and sterna yellow. Legs yellow with tinge of orange, tarsi brown.

Structure. Crown 0.75 as long medially as broad between eyes. Clypellus swollen and broad ( Fig.6I ). Laterofrontal suture obscure above antennal base. Antennae extended beyond folded forewings. Pronotum 1.5 times as long as crown, and more than twice as wide as long. Mesonotum longer than pronotum. Forewing with apex rounded; outer apical cell rounded and broader than rest of apical cells at midlength, inner apical cell strongly divergent; veins arcuate.

Male genitalia. Pygofer slightly longer than height, with short and long macrosetae, posterior margin almost rounded, posterodorsal margin with angular projection but much shorter than in Y. flavopicta Wei & Webb , laterobasal area convex with short strongly oblique cleft. Subgenital plates slightly shorter than pygofer, with one row of long macrosetae centrally over distal half of plate, without short apical setae. Valve triangular, longer than broad with apodemes laterally on anterior margin. Style slender elongate with 4–5 long setae on inner submargin, apex pointed. Connective broader than long, with anterior median short lobe. Aedeagus compressed, in lateral view shaft curved dorsad, with one dorsal and one more elongate ventral processes, gonopore near dorsal process and margin between this and ventral process U-shaped; dorsal apodeme well developed. Sclerotised dorsal connective present in pygofer phragma. Segment X small not exceeding pygofer.

Measurements. Male 6.8 mm long, 1.3 mm wide across eyes and 1.6 mm wide across posterolateral angles of pronotum.

Material examined. Holotype male, INDIA: Arunachal Pradesh: 12 km N, Tiwarigaow , 28 o 14’22.9”N, 095 o 502’50.1” E, 1926 m, 13.ix.2014, Yeshwanth, H.M., Sweep net ( UASB).

Remarks. Forewing venation of this species is very similar to that of Y. darjeelingensis but the forewing coloration is different including having only one yellow triangular spot compared to at least two in the other two species and also it has a much wider and swollen clypellus compared to the other two species with the laterofrontal sutures obscure above the antennal bases, while in other species extended dorsally close to the eye. The male genitalia are a little different from Y. flavopicta (male unknown for Y. darjeelingensis ) but there is similarity in the shape of the subgenital plate with medial placement of macrosetae.

Figures

FIGURES 6 A–I. Species of Stegelytrini. A–D, Pachymetopius anamikus sp. nov.: A, habitus male, dorsal view; B, habitus, male, lateral view; C, habitus female, dorsal view; D. habitus female, lateral view. E–F, Yaontogonia unipuncta sp. nov.: E, habitus, dorsal view; F, habitus lateral view. G–I, faces: G–H, P. anamikus sp. nov. male and female respectively; I. Y. unipuncta sp. nov.

FIGURES 9 A–I. Yaontogonia unipuncta sp. nov., male genitalia: A, terminal abdominal segments, lateral view; B, genital capsule, lateral view; C, pygofer and anal segments, dorsal view; D, valve and subgenital plates, ventral view; E, styles and connective, ventral view; F–G, aedeagus dorsal and ventral views; H–I, aedeagus, lateral views.