Nilgiriscopus transversus Viraktamath Paraidioscopus Maldonado-Capriles, 2022

VIRAKTAMATH, C. A. & YESHWANTH, H. M., 2024, Arboreal eurymeline leafhoppers (Hemiptera: Cicadellidae: Eurymelinae) of the Indian subcontinent with description of new genera and eight new species, Zootaxa 5462 (1), pp. 1-125 : 70-73

Nilgiriscopus transversus Viraktamath

Figs 37 A–L .

Nilgiriscopus transversus Viraktamath 2007: 28–29 , figs. 55–65.

Diagnosis. Lemon Yellow. Pronoutm with one small dark bown spot on anterior margin on either side of median line (less prominent or absent in female). Exposed mesonotum with basal triangles black. Forewing corial veins and costal margins fuscous. Male genitalia as in generic diagnosis.

Remarks. Viraktamath (2007) adequately described and figured the species based on one male and two females collected from Coonoor (Nilgiri Hills, Tamil Nadu).

Genus Paraidioscopus Maldonado-Capriles

Paraidioscopus Maldonado-Capriles 1964: 98 . Type species: Idioscopus tagalicus Baker , by original designation.

Dignosis. Very similar to Idioscopus . Aedeagal shaft thin often sinuate with two slender long processes directed basally. Breed on species of the plant genus Semecarpus , family Anacardiaceae .

Remarks. Viraktamath & Yeshwanth (2022) have adequately diagnosed the genus and treated the three included species from the subcontinent. The three species included are Paraidioscopus andamanicus Viraktamath & Yeshwanth ( Figs 38A–E , from Diglipur, Andaman Islands), P. harrisi Viraktamath ( Figs 38F–J , from Karnataka, breeding on Semecarpus anacardium L.) and P. unimacultus (Melichar) ( Figs 38K–N , from Sri Lanka, breeding on Semecarpus coriaceus Thwaites ). They also illustrated the habitus and male and female genitalia of these species and included a key to four included species of the genus.

Genus Periacerus Viraktamath & Parvathi

Periacerus Viraktamath and Parvathi 2002: 488 . Type species: Periacerus lalithae Viraktamath , by original designation.

Diagnosis. Ochraceous, pronotum wih dark brown to black band on posterior margin. Crown and face dorsad of ocelli transversely striate. Mesonotum longer than pronotum. Clypoclypellar suture absent. Clypellus in basal 0.66 strongly depressed, lora raised. Forewing with three subapical cells. Male antennae with subapical disc. Male sternite VIII and IX with anterior apodemes well-developed. Metabasitarsomere with three platellae flanked on either side by one seta ( Fig. 40G ). Male pygofer with basal fracture, without ventral process. Subgenital plates broadest in midlength, well-sclerotized, pigmented, held vertically, with long marginal thin hair-like setae. Style elongate, with well-developed preapical lobe bearing 2–3 prominent long setae, apophysis with thin narrow laminate process laterally near apex. Aedeagus U-shaped, dorsal apodeme well-developed, shaft compressed with subapical gonopore on ventral surface. Ovipositor extending well beyond pygofer. Valvula I broadest at midlength then tapered distally to a pointed apex, dorsal sculpturing strigate, sculptured area occupying 0.66 to 0.75 distal length. Valvula II angularly raised and widened at base frome where the toothed area starts, with basal hyaline area, toothed area occupying 0.5–0.66 distal length, teeth prominent and either close to each other or slightly away from each other.

Remarks. Viraktamath & Parvathi (2002) adequately characterized the genus and commented that this genus is similar to the African genus Pandacerus Webb (1983) as they have very similar female genitalia and differentiated Periacerus based on basally constricted clypellus, longer latero-frontal suture above the antennal pit, distinct basal lobe of subgenital plate, dorsolateral fracture of the male pygofer in addition to closed inner and median subapical cells. From Idioscopus it differs in having sclerotized subgenital plates that are held vertically, lateral laminate process of the style near apex and the aedeagus lacking long processes. Three species are included in the genus from the subcontinent.

Key to species of Periacerus Viraktamath & Parvathi

1. Frontoclypeus with median and lateral dark brown to black stripes ( Fig. 41C ); male anal collar process with distal rounded lobe crenulate ( Fig. 41G ) ( Sri Lanka)............................................ .. P. lankensis Viraktamath & Parvathi

- Frontoclypeus without such stripes, may be with median brown stripe traversing entire length, and clypellus with dark brown stripe ( Figs 39C , 40C ); male anal collar process with distal rounded lobe not serrate ( India).......................... 2

2. Aedeagal shaft apex hooked, without subapical lateral tooth ( Fig. 40K )........................ P. lalithae (Viraktamath)

- Aedeagal shaft apex not hooked, with subapical tooth ( Figs 39 IJ).................. P. bidentatus Viraktamath & Parvathi

Figures

FIGURES 37A–L. Nilgiriscopus transversus Viraktamath, holotype male and paratype female: A–B, habitus male, dorsal and lateral views; C, face, male; E, label data; E, female paratype, habitus, dorsal view; F, forewing; G, female abdominal apex, ventral view; H, male genital capsule, lateral view; I, connective, dorsal view; J, style, lateral view; K, connective and aedeagus, lateral view; L, aedeagus, ventral view.

FIGURES 38A–N. Species of Paraidioscopus Maldonado-Capriles: A–E, P. andamanicus Viraktamath & Yeshwanth: A–B, holotype male, habitus, dorsal and lateral views; C, face; D, label data; E, aedeagus, lateral view. F–J, P. harrisi Viraktamath: F–G, paratype male, habitus, dorsal and lateral views; H, face; I, label data; J, aedeagus, lateral view. K–N, P. unimaculata (Melichar): K–L, male, habitus, dorsal and lateral views; M, face; N, aedeagus, lateral view.

FIGURES 39A–J. Periacerus bidentatus Viraktamath & Parvathi: A–C, paratype male:A–B, habitus, dorsal and lateral views; C, face; D–F, female paratype, D–E, habitus, dorsal and lateral view; F, face; G, male genital capsule, lateral view; H, styles, connective and aedeagus, ventral view; I, styles, connective and aedeagus, lateral view; J, aedeagus, ventral view.

FIGURES 40A–K. Periacerus lalithae (Viraktamath): holotype male: A–B, habitus, dorsal and lateral views; C, face; D, label data; E–F, female paratype, habitus, dorsal and lateral view; G, metabasitarsomere, dorsal view; H, male genital capsule, lateral view; I, styles, connective and aedeagus, dorsal view; J, style, dorsal view; K, aedeagus, lateral view.

FIGURES 41A–L. Periacerus lankensis Viraktamath & Parvathi, holotype male: A–B, habitus, dorsal and lateral views; C, face; D, label data; E, forewing; F, male sternite VIII, ventral view; G, male genital capsule, lateral view; H, subgenital plate, lateral view; I, connective, dorsal view; J, style, lateral, dorsal and ventral views; K, aedeagus, ventral view; L, connective and aedeagus, lateral view.