Selymbria boliviaensis, Sanborn, 2019

Sanborn, Allen F., 2019, The cicada genus Selymbria Stål, 1861 (Hemiptera: Cicadidae: Tibicininae: Selymbrini): redescription including ten new species and a key to the genus, Zootaxa 4614 (3), pp. 401-448 : 405-409

Selymbria boliviaensis n. sp.

( Fig. 1 )

TYPE MATERIAL. Holotype. “ BOLIVIA: Santa Cruz, 3.7 km / SSE Buena Vista, Hotel Flora / & Fauna , 430 m; 5–15–XI–2001 / coll. M.C. Thomas & B. Dozier / tropical transition forest, BLT” male ( FSCA) . Paratypes. Same data as holotype, one male ( FSCA), one male ( AFSC); “ BOLIVIA / Guanay, Coroico, / La Paz Prov. / Nov. 1994 / A. Ugarte P.” one female ( MSMC) .

ETYMOLOGY. The name is a combination of bolivia— for the country of origin of the type series and— ensis (L. suffix denoting place).

DESCRIPTION. Ground color of head and thorax greenish tawny marked with piceous, abdomen piceous marked with castaneous and greenish. Female tawny and castaneous possibly due to chemical discoloration.

Head. Head wider than pronotal collar lateral angles and mesonotum, dorsal head piceous except for triangular spot on posterior epicranial suture and triangular spot on posterior cranial depression, supra-antennal plates and small triangular mark on anterolateral vertex posterior to supra-antennal plate that are ground color, piceous posterior to eye. Long silvery pile posterior to eye, short golden pile on vertex, white pubescence lateral to lateral ocelli, in epicranial suture, on posterior cranial depression and posterior to eye. Ocelli red, rosaceous in one paratype, eyes testaceous. Ventral head piceous except transverse fascia ventral to supra-antennal plate continuous with dorsal mark but not reaching eye, posterior margin of gena, anterior and lateral margin of lorum ground color, long silvery pile ventral to eye, on gena and on lorum, white pubescence on ventral head. Postclypeus with nine transverse grooves, central sulcus narrow at apex expanding laterally on posteroventral surface, ground color with dorsal surface posterior to transverse grooves, within expanded region of central sulcus, within transverse grooves and ventroposterior piceous, first three dorsal transverse groove piceous connected medially by fascia lateral to central sulcus, white pubescence laterally and posteroventrally, short silvery pile on ventral surface. Anteclypeus piceous, covered with white pubescence, denser in paratypes. Mentum ground color, medial labium castaneous, lateral and distal labium piceous, tip reaching to middle leg trochanter, with sparse short silvery pile, denser near tip. Scape and proximal pedicel ground color, distal pedicel and flagellar segments piceous.

Thorax. Dorsal thorax ground color. Pronotum ground color, lightly castaneous on either side of midline, with transverse piceous marks on anterior disks on either side of anterior midline and between anterior sutures, transverse mark on posterior disk with angled medial margin extending laterally to posterior lateral fissure, ambient fissure piceous from anterior lateral fissure to posterior mark, longitudinal piceous fascia on lateral scutes, curved piceous and castaneous mark on scute between central paramedian fissure and posterior lateral fissure connecting to posterior transverse mark. Pronotal collar lightened ground color. Mesonotum ground color, piceous on disk lateral to lateral sigillae, medioanterior and the middle of the lateral margin of the lateral sigillae, between lateral and submedian sigillae diverging and extending along medial margin of lateral sigilla almost to posterior margin and medially to spot on disk, curved marks along medial submedian sigillae margins connecting to parapsidal suture expanded into triangular mark on anterior terminus, between posterior submedian sigillae and scutal depressions, curving fascia between anterior arms of cruciform elevation extending anteriorly along midline forming triangular, ground color mark on midline anterior to cruciform elevation, piceous mark on disk extends anteriorly as a triangle on midline terminating anterior to posterior margin of submedian sigillae, scutal depressions surrounded by circular region of ground color, posterior mesothorax piceous. Cruciform elevation ground color with piceous mark posterior to anterior arm of cruciform elevation, wing groove ground color with piceous spot on anteromedial margin. Metanotum piceous with ground color posterior margin. Long silvery pile in posterior wing groove, silvery pile on posterior margin, white pubescence and silvery pile on area lateral to lateral sigillae, on lateral cruciform elevation, anteriorly between the arms of the cruciform elevation, and dorsally posterior to submedian sigillae in paratype. Ventral thoracic segments testaceous except piceous all but lateral basisterna 2 and 3, covered with white pubescence.

Wings. Fore wings hyaline with eight apical cells, hind wings hyaline with six apical cells. Cubitus anterior 1 of the fore wing straight between the split with cubitus anterior 2 and the mediocubital crossvein. Venation ochraceous except piceous anal vein 2 + 3, becoming piceous in apical cells except for radius anterior 2, ambient vein piceous. Basal cell longer than broad, hyaline with slight greenish tint along radius & subcostal vein and at base. Pterostigma present. Infuscation on distal radius anterior 2 and distal radius posterior, infuscation extending onto ambient vein anterior to radius posterior and onto wing margin, extending to wing apex in paratypes, second infuscation within distal ulnar cells 1 and 2, and proximal apical cells 1–3 and covering the distal half of radius anterior and radius posterior along ulnar cell 1, proximal half of radius anterior 1 and proximal third of radius anterior 2 along apical cell 1proximal base of radius posterior and median vein 1, median vein 1 proximal to radiomedial crossvein, and entire radial and radiomedial crossveins. Basal membrane of fore wing gray with dark gray posterior margin. Venation of hind wing tawny ochraceous, ambient vein and distal veins greenish piceous, anal veins 2 and 3 castaneous. Anal cell 3 and anal cell 2 along anal vein 3 gray, anal cell 2 along anal vein 2 gray, gray area margined with infuscation in anal cells 2 and 3, spot of infuscation on wing margin distal to apical cells 1 and 2, only distal to apical cell 2 in some paratypes.

Legs. Legs ochraceous, darker coxae and trochanters, dark castaneous marks on medial and lateral hind coxae, distal tibiae dorsal metatarsus and mesotarsus, distal pretarsus piceous. Fore femora proximal spine ground color with castaneous tip, longest spine, forming acute angle to femur, secondary spine ground color with castaneous distal half, elongate, slightly angled to femoral axis with curved tip, upright, and small, slightly angled, castaneous apical spine, more than half as long as secondary spine which is large for the genus, long silvery pile radiating from ridge with spines. Tarsal claws dark castaneous with piceous tips, tibial spurs and comb castaneous with darker tips. Legs covered with long and short silvery pile.

Operculum. Male operculum dark ochraceous with piceous spots on medial base, lateral base, and anteromedial corner, lateral margin angled mediad joining to smoothly rounded posterior margin, posterior medial margin straight, angled slightly mediad, curving anteromediad to base which is at medial meracanthus, almost reaching to anterior margin of sternite II covering tympanal cavity completely. Medial margin extending to medial margin of tympanal cavity. Meracanthus ochraceous with castaneous spot on medial base, broadly triangular with straight tip but curved lateral margin, reaching to posterior of sternite I. Female operculum ochraceous with piceous spot on lateral base, lateral margin straight slightly angled mediad, curved posterolateral and posterior margins, terminating medially at middle of meracanthus, reaching to middle of sternite II. Female meracanthus ochraceous with castaneous medial mark, curving mediad, pointed with straight tip, longer than operculum extending to posterior of sternite II. Opercula lightly covered with white pubescence, denser at base, radiating silvery pile in paratype.

Abdomen. Male tergites piceous with castaneous lateral margins, tergite 1 with greenish spot on dorsal timbal cavity margin, tergite 2 with greenish spot on ventral timbal cavity margin, greenish on dorsolateral tergite 7 with thin transverse castaneous fascia anterior to greenish posterior margin, thin anterior piceous transverse fascia, mostly castaneous and wider green posterior margin in tergite 8, female tergites castaneous, dark castaneous on lateral posterior margin of tergite 8, auditory capsule piceous, castaneous in female. Timbal cover recurved exposing timbal dorsally, piceous. Timbal with twelve long and eleven intercalary ribs. Female abdominal segment 9 castaneous with darker stigma and dorsal beak, covered with long golden pile on ventral and ventrolateral surfaces. Posterior margin of female abdominal segment 9 slightly sinuate. Sternite I dark castaneous, sternite II dark castaneous with lighter ventrolateral region and lateral anterior margin, sternites III–VI dark castaneous medially forming central fascia within lighter castaneous lateral regions, sternite VII dark castaneous with tawny posterolateral margins, sternite VIII U-shaped with transverse posterior margin, radiating long golden pile. Female sternites similarly marked. Epipleurites castaneous. Female sternite VII with a deep medial notch almost reaching anterior margin, V-shaped anteriorly, an oblique angle forms a short straight region before curving to converging straight extension to posterior margin, posterior margin of sternite smoothly arched to lateral surface, posterior half of posterior extension lighter. Long silvery pile radiating from sternites, white pubescence on male sternites I and II, lateral sternites and epipleurites III–VI.

Genitalia. Male pygofer dark castaneous with piceous dorsum, dorsal beak and posterior, with short silvery pile on dorsal beak, longer and denser on ventral surface, distal shoulder small, ochraceous, forming a right angle, curving smoothly to dorsal beak, dorsal beak triangular with pointed apex, arching to terminus when viewed from the side. Pygofer basal lobe angled laterally from base, swelling and bending mediad at right angle past half distance then tapering to rounded apex adpressed against pygofer, extending to about half pygofer length, pygofer upper lobes small flattened extending along dorsal terminus of basal pygofer lobe producing a small ridge almost perpendicular to pygofer. Anal styles piceous radiating short silvery pile, extending well beyond dorsal beak, anal tube dark ochraceous. Uncus lobe large, piceous, dorsally concave except for small convex region near terminus, small recurved spine on either corner of terminus, terminus transverse when viewed from above, ventrally concave with medial carina, lateral portion folded ventrally from dorsal surface forming roughly triangular shape not reaching apex when viewed from the side, slightly widening from base before reducing width towards terminus. Dorsal, lateral and ventral surfaces radiating long silvery pile. Aedeagus dark castaneous, with curving spine-like lateral extensions near terminus.

Female gonocoxite IX and gonapophyses light castaneous. Gonocoxite X light castaneous almost extending to length of dorsal beak but not as far as anal styles, with radiating golden pile. Anal styles castaneous, anal tube ochraceous.

MEASUREMENTS (MM). N = three males or one female, mean (range). Length of body: male 20.97 (20.6–21.6), female 21.0; length of fore wing: male 24.75 (25.7–25.7), female 26.0; width of fore wing: male 8.50 (8.3–8.8), female 8.3; length of head: male 3.70 (3.6–3.9), female 3.7; width of head including eyes: male 7.77 (7.6–7.9), female 7.8; width of pronotum including suprahumeral plates: male 7.07 (6.8–7.3), female 7.2; width of mesonotum: male 6.77 (6.6–6.9), female 6.4.

DIAGNOSIS. A unique feature is the male operculum encapsulates the meracanthus. Selymbria ahyetios , S. pandora and S. subolivacea can be distinguished from this species by the lack of infuscation on the apex of their fore wing. The infuscation of the fore wing is found only on the apex of the fore wing in S. ahyetios , S. chevauxensis n. sp., S. cinctifera n. sp., S. guatemalensis n. sp., S. guianensis n. sp., and S. pluvialis which distinguishes these species from S. boliviaensis n. sp. The infuscation is restricted to the radiomedial crossvein in the fore wing of S. danieleae without extending onto the basal apical cells 1–3. The infuscation found on the apex of the fore wing is restricted to the apex of apical cell 2 crossing the ambient vein onto the wing margin in S. stigmatica . The piceous region on dorsal head is reduced between the lateral ocelli and eye and the medial margin to notch in female sternite VII curves laterad toward the posterior in S. puntarenasensis n. sp. Tergite 3 in the male is wider than tergite 2, and the medial margin of the notch in female sternite VII curves posterolaterad and distinguishes S. stigmata. Selymbria ecuadorensis n. sp. can be distinguished by the rounded terminus of the male uncus and the slightly constricting posterior notch in female sternite VII. The extension of male tergite 2 over the posterolateral timbal cavity, the concave ventral terminus of the uncus, and the straight medial margins in female sternite VII that widen slightly distinguishes S. iguazuensis n. sp. from this new species. The male uncus is as wide as the pygofer and the medial margins of the posterior extension of female sternite VII smoothly curve mediad forming a sharp acute angle at the apex that almost meet over the gonapophyses at the posterior sternite in S. madredediosensis n. sp. The male uncus lacks a lateral expansion near the terminus and the medial margins of the posterior notch female sternite VII with are parallel in S. loretoensis n. sp.

DISTRIBUTION. The species is known only from the type series collected in Bolivia.

Figures

FIGURE 1. Selymbria boliviaensis n. sp.: A, holotype male and paratype female habitus; B, holotype male dorsum; C, holotype male timbal cover; D, paratype male operculum; E, paratype female operculum; F, holotype male lateral view of genitalia; G, holotype male posterior view of genitalia; H, paratype female lateral view of genitalia; I, paratype female ventral view of genitalia. Scale bar: A, 2 cm; B, 5 mm; C–E, 2 mm; F–G, 1 mm; H–I, 2 mm.