Selymbria amazonensis Ruschel & Paladini 2024, sp. nov.
Creators: name: Ruschel, Tatiana Petersen
name: Paladini, Andressa
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadidae
Selymbria
Selymbria amazonensis

description: Selymbria amazonensis sp. nov.
(Figs. 1A-K; 2A-F)
Type material: Holotype male (INPA): BRASIL, AM, Benjamin / Constant, Sítio do Damião / 042441S – 700230W // 08-10.ix.2005, arm. Luz. / J.A. Rafael & F.F. Xavier Fº (Fig. 1A).
Paratype male (INPA): BRASIL, AM, Castanho- / Careiro, Ramal do Panelão / 03°50′42″S – 60°26′03″W / 04-05. xi.2010, J.A. Rafael, // D.M. Takiya, F.F.F. Xavier Fº, / M.J. Holanda & D.M.M. / Mendes; arm. luminosa / móvel, 21:00 – 00:00 h (genitalia in micro vial).
Paratype female (INPA): BRASIL, AM, Tabatinga / 041215S – 695432W / 03-08.ix.2005, arm. luz / J.A. Rafael & F.F. Xavier Fº (Fig. 2A).
Etymology: The epithet refers to the Brazilian state, Amazonas, where type specimens were collected.
Diagnosis: This species can be distinguished from other Selymbria by the following combination of features: vertex primarily piceous, except for space between anterior arm of epicranial suture toward supra-antennal plates; male operculum subrectangular, covering tympanal cavity, posterior margin rounded, reaching middle of sternite II, lateral margin nearly straight; forewings hyaline with infuscation on the following: distal radius anterior 1, distal radius anterior 2 and distal median vein 1; radius anterior vein extending to radial crossvein; and distal radius posterior extending to radial median crossvein; uncus shovel shaped, twice as long as anal styles, dorsal beak in lateral view almost as wide as pygofer in ventral view; lateral margins of uncus wider proximally; theca dorsally developed with bifurcated apex, slender sclerotized pointed structure between the bifurcation, originating from vesica; ventral part of theca with vesica and slender sclerotized pointed structure at middle; female sternite VII longer than sternite VI, lateral margin concave becoming convex toward apex.
Description: Male: Holotype ground color of head and thorax greenish marked with piceous,abdomen piceous, marked castaneous and green. Paratypes tawny marked with piceous,abdomen piceous marked with castaneous and green. Color of paratypes most faded after collection and preservation. All specimens with wax in the ventral body.
Head (Figs. 1B, C) wider than lateral angle of pronotal collar and mesonotum, vertex piceous except for space between anterior arm of epicranial suture toward supra-antennal plates; supra-antennal plates with small piceous mark (except in the paratype female); lateral ocelli widely separated, distance between lateral ocelli greater than between each lateral ocellus to median (Fig. 1B); dorsal postclypeus as long as vertex, long and convex piceous mark reaching half length, piceous transverse grooves; golden setae in posterior margins of the eyes. Ventral postclypeus with two thirds of central sulcus piceous (holotype) or entirely piceous (paratypes), and piceous within the transverse groove; anteclypeus and carina piceous, dorsal surface tumid; lorum piceous; antenna with greenish scape, pedicel and flagellum piceous (Fig. 1C); labium reaching basisternum 3, piceous at apex.
Thorax (Figs. 1 B-E). Pronotum (Fig. 1B): median lobe with two comma-shaped piceous marks opposite each other and median longitudinal space between them; paramedian and lateral lobes with longitudinal piceous mark; two piceous marks toward each other departing from ambient fissure of pronotum (marks of pronotum conspicuous in paratypes); pronotal collar greenish (holotype) unmarked, lateral margin convex, lateral part of pronotal collar not as wide as eyes. Mesonotum (Fig. 1A): margins of lateral sigillae and internal and posterior margins of submedian sigillae piceous; central piceous mark projected toward submedian sigillae connecting to lateral sigillae; scutal depression piceous; wing groove greenish with internal margin with golden pile setae, external margin almost straight becoming convex toward cruciform elevation; central area of cruciform elevation swollen, cruciform elevation greenish with the posterior margin and arc of posterior arms with golden setae; metanotum covered by golden pile setae; basisternum 3 (Fig. 1D) obtuse, not prominent relative to mesocoxae, posterior angle concave. Male opercula (Fig. 1E) covering the tympanal cavity, rounded posterior margin reaching middle of sternite II, lateral margin almost straight. Forewings (Fig. 1A) hyaline featuring eight apical cells,infuscation on the following: distal radius anterior 1, distal radius anterior 2 and distal radius posterior vein 1; proximal radius anterior veins extending to radial crossvein; proximal radius posterior extending to radial median crossvein. Costal and radius + subcostal vein green, first with spines on margin; basal cell hyaline. Hindwings hyaline with six apical cells, infuscation absent.
Male abdomen (Figs. 1A, F, G): Timbals exposed (Fig. 1F), turned-back rim in posterior margin of timbal cavity (Fig. 1F); male abdomen (Fig. 1A) cylindrical, tergites 1 to 6 piceous, marked castaneous and covered with white setae at anterior margin. Tergites 7 and 8 piceous, marked castaneous and green. Sternites I to VII piceous and castaneous at middle, posterior margins green, lateral margins covered with wax. Sternite VII (Fig. 1G) sub-rectangular, lateral margin almost straight becoming convex, posterior margin not emarginate. Sternite VIII elongated and piceous.
Male genitalia (Figs. 1H-K): Uncus shovel shaped (Figs. 1 H-K), twice as long as anal styles and dorsal beak in lateral view (Figs. 1H, I), almost as wide as pygofer in ventral view (Fig. 1J). Lateral margins of uncus wider proximally (Fig. 1J). Pygofer sub-cylindrical, upper lobes small and rounded; basal lobe surpassing posterior margin of uncus,ventral margin of basal lobe slightly straight (Figs. 1 H-J). Dorsal beak shorter than anal styles in lateral view (Figs. 1H, I). Theca dorsally developed with bifurcated apex and slender sclerotized pointed process between bifurcation, originating from vesica; ventral part of theca with vesica and slender sclerotized pointed process at middle (Figs. 1J, K).
Female (Figs. 2A-F): Similar to male in terms of their external morphology (Figs. 2 A-C), except in the following features: smaller and sub-triangular operculum (Fig. 2D); sternite VII longer than sternite VI,lateral margin concave becoming convex toward apex (Fig. 2E, 3B); anal styles longer than dorsal beak and ovipositor sheath in lateral view (Fig. 2F); internal margins of abdominal segment 9 piceous becoming convex at middle and converging at apex (Fig. 2E).
Remarks: The species can be distinguished from S. subolivacea and S. pandora by the presence of infuscation in the forewings; from S. ahyetios, S. chevauxensis Sanborn, 2019, S. cinctifera Sanborn, 2019, S. guatemalensis Sanborn, 2019, S. guianensis Sanborn, 2019 and S. pluvialis by the infuscations not restricted to the forewings apex; from S.danieleae by the infuscations not restricted to the radiomedial crossvein; from S. stigmatica by the infuscations extending beyond the apex of apical cell 2, crossing the ambient vein onto the forewing margin;from S.boliviaensis Sanborn, 2019 by the theca shape and meracanthus not nearly reaching the posterior margin of male operculum; from S. iguazuensis Sanborn, 2019 by the male operculum shape and the uncus longer than the dorsal beak of pygofer in lateral view, and from S. loretoensis Sanborn, 2019 and S. madredediosensis Sanborn, 2019 by the same features mentioned above, including the ventral margin of basal lobe of pygofer, which is slightly straight. The new species is similar to S. ecuadorensis Sanborn, 2019 in having a theca with bifurcated apex, but differs in having the meracanthus more distant from the posterior margin of operculum, the posterior margin of operculum surpassing sternite II, and the uncus longer than pygofer dorsal beak in lateral view.
description: Published as part of Ruschel, Tatiana Petersen & Paladini, Andressa, 2024, Selymbria Stål, 1861 (Hemiptera: Cicadidae: Tibicininae): description of a new species with notes on the genus taxonomy and distribution, pp. 1-13 in Papéis Avulsos de Zoologia 64 on pages 3-6, DOI: 10.11606/1807-0205/2024.64.003, http://zenodo.org/record/10552187