Subrasaca diminuta Silva, Cavichioli et Mejdalani, sp. nov.
Creators: name: Silva, Roberta Dos Santos Da
name: Cavichioli, Rodney Ramiro
name: Mejdalani, Gabriel
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadellidae
Subrasaca
Subrasaca diminuta

description: Subrasaca diminuta Silva, Cavichioli et Mejdalani, sp. nov.
(Figs 1–20)
Length. Male holotype, 5.0 mm; male paratypes, 4.8-5.1 mm (n = 2); female paratypes, 5.4-5.6 mm (n = 2).
Holotype description. Head and thorax. Head (Fig. 1) with median length of crown approximately 1/2 interocular width and 3/10 transocular width. Crown (Fig. 1), in dorsal view, broadly rounded anteriorly; ocelli located slightly anterad of line between anterior eye angles; without transverse concavity before ocelli. Antennal ledges, in lateral view, with anterior margin vertical. Frons convex; muscle impressions distinct; epistomal suture obscure medially; clypeus not produced, contour continuing profile of frons dorsally and more nearly horizontal ventrally. Thorax (Fig. 1) with pronotal width approximately equal to transocular width of head; lateral pronotal margins convergent anteriorly; posterior margin slightly concave; pronotal disk with slight rugae; mesonotum with scutellum slightly transversely striate behind transverse sulcus. Forewings with veins mostly indistinct except at apical portion; texture coriaceous. Other features of head and thorax as in the generic description of Young (1977: 472).
Color. Anterior dorsum (crown, pronotum, and mesonotum) and forewings dark brown to black (Fig. 1). Crown with broad, transverse orange arc, median portion of arc located before ocelli; arc delimiting large, posterior dark brown to black trapezoid area; posterior coronal margin with pair of small brown spots. Pronotum with pair of oblique, elongate orange maculae extending to lateroposterior margins. Forewings with orange markings distributed as follows: clavus with elongate stripe on basal half (extended from pronotal macula), posterior claval portion with large macula; distal half of corium with macula extending from apex of clavus over apical portion of brachial cell and basal portion of inner anteapical cell; distal half of corium with narrow unpigmented stripe along costal margin. Face mostly dark brown to black except brownish-yellow inferior portion; antennal ledges orange; rostrum brownish-yellow. Thorax and legs mostly yellow except dark brown proepisternum, lateral pronotal lobe, and lateral area of mesothorax.
Male genitalia. Pygofer (Fig. 2), in lateral view, not strongly produced posteriorly; posterior margin rounded; without processes; macrosetae distributed mostly on distal third of disk and more anteriorly on ventral portion. Subgenital plates (Fig. 3), in ventral view, subtriangular, elongate, basal third expanded laterally, median and distal thirds gradually narrowed posteriorly; plates connected to each other basally by small, triangular membranous area; in lateral view, not extending as far posteriorly as pygofer apex; with uniseriate macrosetae. Connective (Fig. 4), in dorsal view, Y-shaped; stalk narrow and elongate in comparison to arms. Style (Fig. 4), in dorsal view, elongate, extending posteriorly farther than apex of connective; preapical lobe distinct, with few setae; apical portion digitiform. Aedeagus (Fig. 5) short; in lateral view, with distinct dorsal lobe; latter not constricted, distal portion slightly emarginated; gonoduct distinct, sclerotized. Paraphyses (Fig. 6) symmetrical, with two rami; distal half of each ramus directed dorsoanteriorly, forming distinct angle with basal half, and with spiniform process at base.
Female genitalia. Abdominal sternite VII (Figs 7, 8), in ventral view, with strongly convex surface; lateral margins convergent posteriorly; posterior margin slightly concave, with small darkly sclerotized area on median portion. Internal abdominal sternite VIII (Fig. 9), in dorsal view, with pair of small sclerites adjacent to each other medially. Pygofer (Fig. 11), in lateral view, moderately produced posteriorly; apical portion narrowed, apex obtuse; macrosetae distributed mostly on posterior portion and extending anteriorly along ventral margin. First valvifers (Fig. 12), in lateral view, ellipsoid. First valvulae, in ventral view, moderately expanded basally (Fig. 10); in lateral view (Fig. 12), with apex acute; ventral interlocking device located on basal half of blade, about 2/3 of its length adjacent to ventral blade margin, apical 1/3 directed dorsally; dorsal sculptured area (Figs 13, 14) extending from basal portion of blade to apex, formed mostly by scale-like processes arranged in oblique lines, except basally with more linear processes; ventral sculptured area (Fig. 15) restricted to apical portion of blade, formed mostly by scale-like processes. Second valvulae (Fig. 16), in lateral view, with dorsal margin convex, ventral margin mostly straight; preapical prominence (Fig. 20) small but distinct; apex obtuse; about 25 teeth (Figs 17–19) distributed continuously on dorsal expanded portion of blade, most teeth triangular with ascending portion short, descending portion long; basal-most two teeth rounded, inconspicuous; denticles (Figs 17–20) distributed on teeth and on apical portion of blade, except at apex; dorsal dentate apical portion distinctly smaller than ventral one; blade with ducts (Fig. 18) extending to apical portion and to teeth or terminating below latter; few basal teeth without ducts. Gonoplacs, in lateral view, with basal half narrow and apical half distinctly expanded; apex obtuse; tiny setae and few macrosetae distributed on apical portion and extending anteriorly along ventral margin.
Etymology. The new species name, diminuta, refers to the small size of the body in comparison to other species of the genus.
Type material. Southeastern and Southern Brazil. Holotype: male, “BR [Brazil] SP [São Paulo State] Ubatuba PESM [Parque Estadual da Serra do Mar] \ Núcleo Picinguaba \ 1-4\VI\2000 \ Equipe Lab. Ent. UFRJ \ col.” (MNRJ). Paratypes: one female, same data as holotype (MNRJ); one male, one female, same data as holotype except “ 25-28/X/2000 ” (MNRJ); one female, “Picinguaba – Ubatuba / São \ Paulo \ 08-12/VI/2005 \ R. Carvalho & A. Leal col.” (MNRJ); two males, “ 25°48’S 290m \ 48°54’W X/2004 \ Paraná [State] – Brasil \ CAVICHIOLI col.” (DZUP, MNRJ); two males, three females, “S. J. Pinhais / PR [Paraná State] \ Estrada dos \ Castelhanos \ Rio S. João”; “ 296 m \ 25/IX/2004 \ 25°48’41’’ \ 48°54’54’’”; “Cavichioli col.” (DZUP, MNRJ); two females, same data as preceding except “ 18/IX/2004 ” and “Cavichioli & \ Leal col.” (DZUP).
description: Published as part of Silva, Roberta Dos Santos Da, Cavichioli, Rodney Ramiro & Mejdalani, Gabriel, 2013, Descriptions of three new Brazilian Subrasaca species, redescription of S. nigriventris (Signoret, 1855) and a key to males of the genus (Hemiptera: Cicadellidae: Cicadellini), pp. 372-384 in Zootaxa 3722 (3) on pages 373-376, DOI: 10.11646/zootaxa.3722.3.6, http://zenodo.org/record/224150