Nesocerus angulatus, Krishnankutty & Dietrich, 2011

Krishnankutty, Sindhu M. & Dietrich, Christopher H., 2011, Taxonomic revision and phylogeny of an endemic leafhopper genus Nesocerus (Hemiptera: Cicadellidae: Idiocerinae) from Madagascar, Zoological Journal of the Linnean Society 162 (3), pp. 499-543 : 507-520

NESOCERUS ANGULATUS SP. NOV.

( FIGS 3E, F , 6R–Y )

Diagnosis: This species can be distinguished from others by the following combination of characters: convex lateral profile, attenuate posterodorsal process of pygofer, aedeagus with angulate lateral flange near the base, and shape of socle in posterior view narrower towards base. This species is similar to N. sclerophyllus in habitus and male genitalia, but can be distinguished by the shape of the socle and presence of a lateral flange on the aedeagus.

Description: Length of male, 4.1 mm.

Coloration: Crown with three irregular black markings extending to face reaching ocelli. Antennae with scape and pedicel light brown near base, flagellum dull yellow. Frontoclypeus with median, broad, black

520 S. M. KRISHNANKUTTY and C. H. DIETRICH longitudinal stripe joining apically arc-shaped stripe below ocelli, with additional pair of lateral longitudinal stripes; clypeogenal sutures bordered by black stripe. Gena with black marking below antennal ledge. Lorum with black marking along side bordering clypellus. Clypellus black with median small yellow spot near the base. Pronotum with irregular black markings with median longitudinal narrow stripe. Mesonotum with black basal triangle, median diverging black lines not extending posterad of scutellar suture. Forewing mostly hyaline. Legs yellow with pale brown lines along anterior and posterior margins. Mid femur with black stripe along ventral surface near apex.

Structure: Clypellus with sides almost straight, apex narrower than base, in profile convex. Rostrum extending beyond mid coxae. Forewing with r-m1 crossvein absent. Metatibial setal rows PD, AD, and AV with 17–20, eight, and 11 macrosetae, respectively.

Male genitalia: Pygofer broad with posterodorsal process tapered and curved slightly ventrad, apex of process slightly truncate; posterolateral margin with long setae. Subgenital plate, style, and connective as in N. trilineatus . Aedeagus in lateral view with atrium narrow; socle well developed; shape of preatrium in posterior view tapered towards base, shaft in lateral view broad, curved slightly anterad, slightly tapered towards apex; shaft in posterior view acuminate, with pair of short ventrolaterally directed apical processes not extending half of the shaft, with pair of angulate lateral flange near base. Gonopore subapical on posterior surface of shaft basad of processes.

Material examined: Holotype male, MADAGASCAR: Province Fianarantsoa, Parc National Ranomafana, Belle Vue at Talatakely , 1020 m, 21°15′59″S, 47°25′26″E, 22.–28.xi.2001, R. Harin’Hala, malaise, secondary tropical forest, MA-02-09C-04 ( CAS) . Paratype: one male, same data as holotype except 31.iii.-7.iv.2002, MA-02-09C-23 ( INHS) .

Etymology: The specific epithet is derived from the Latin word angulus, referring to the angulate lateral flange on the aedeagus.

Figures

Figure 3. Nesocerus spp. nov., dorsal habitus and face of holotype male. A, B, Nesocerus trilineatus.; C, D, Nesocerus ranomafanaensis; E, F, Nesocerus angulatus; G, H, Nesocerus orbiculatus; I, J, Nesocerus affinis; K, L, Nesocerus sclerophyllus; M, N, Nesocerus bifurcatus; O, P, Nesocerus littoralis; Q, R, Nesocerus fasika; S, T, Nesocerus tulearensis.

Figure 6. Nesocerus spp. nov. Male pygofer in lateral view (A, I, R), male subgenital plate in ventral (B, J, T) and lateral views (C, K, U), aedeagus in lateral (D, L, P, V, Z) and caudal views (E, M, Q, W, A1), style in lateral view (F, N, X), style and connective in dorsal view (G, O, Y), apex of male pygofer in caudal view (H, S). A–H, Nesocerus trilineatus; I–O, Nesocerus ranomafanaensis; P–Q, Nesocerus affinis; R–Y, Nesocerus angulatus; Z–A1, Nesocerus sclerophyllus.