Selymbria iguazuensis, 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 : 429-432

Selymbria iguazuensis n. sp.

( Fig. 7 )

Selymbria pandora non Distant Sanborn & Heath 2014: 74 .

TYPE MATERIAL. Holotype. “ ARGENTINA, Prov. Misiones / Puerto Iguazú / 3 January 1991 / D. Rojas Lanus Coll. ” male ( FSCA). Paratype. “ Brasil: Iguassu (sic), / II 1987 / J. de Tonnancour ” one female ( MSMC).

ETYMOLOGY. The name is a combination of iguazu— for the type locality 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 tawny.

Head. Head wider than pronotal collar lateral angles and mesonotum, dorsal head piceous except for small spot on posterior epicranial suture, spot between median ocellus and frontoclypeal suture in paratype, 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 of paratype. Ocelli red, 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 medial gena and on lorum, paratype with white pubescence on ventral head. Postclypeus with eight transverse grooves, central sulcus narrow at apex expanding laterally on posteroventral surface, ground color with dorsal surface posterior to transverse grooves, within central sulcus, transverse ridges and ventroposterior piceous, paratype with midline fascia within central sulcus piceous and transverse ridges ground color, first four dorsal transverse groove piceous laterally, almost reaching end of transverse ridge in first groove and decreasing in size as move to fourth groove, first groove, all but lateral end of second groove, and complete third groove piceous in paratype, these three connected medially by fascia lateral to central sulcus in paratype, lateral three fourths of fourth groove piceous in paratype, white pubescence laterally and posteroventrally in paratypes. Anteclypeus piceous except ground color spot on anteromedial margin and short longitudinal fascia on either side of posterior carina, covered with white pubescence in paratypes. Mentum ground color, medial labium castaneous proximally, lateral and distal labium piceous, tip not 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 midline, with triangular piceous marks on either side of anterior and posterior midline, anterior mark continues posteriorly as small fascia lateral to midline almost connecting to posterior spot, ambient fissure piceous from anterior lateral fissure to posterior triangular mark, paratype with longitudinal castaneous fascia on lateral scutes. Pronotal collar ground color, paratype with white pubescence on lateral part of pronotal collar and in posterolateral ambient fissure, lateral part of pronotal collar radiates short piceous pile from the margin. Mesonotum ground color, piceous on disk lateral to lateral sigillae, lateral margin, 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 to posterior margin and medially to spot on disk, diverging curved marks along medial submedian sigillae margins connecting to parapsidal suture, between posterior submedian sigillae and scutal depressions, between anterior arms of cruciform elevation extending anteriorly along midline as triangular mark terminating near posterior of submedian sigillae, base curved anteriorly to enclose scutal depressions, and posterior mesothorax. 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 castaneous with ground color posterior margin. Golden 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 light ground color except castaneous all but lateral basisterna 2 and 3, with white pubescence medially in paratype.

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, ambient vein lighter than veins between distal apical cells. Basal cell longer than broad, hyaline with slight greenish tint. Pterostigma present. Infuscation on distal radius anterior 2 extending onto ambient vein on either side and to wing margin, spot extends across apical cells 1 and 2 with a small spot in apical cell 3 in paratype. Basal membrane of fore wing gray with dark gray posterior margin. Venation of hind wing tawny ochraceous, distal anal vein 2 castaneous, anal vein 3 castaneous in paratype. Anal cell 3 and anal cell 2 along anal vein 3 gray, anal cell 2 along anal vein 2 gray. Infuscation in proximal anal cells 2 and 3, spot of infuscation on wing margin distal to apical cells 1 and 2 in paratype.

Legs. Legs ochraceous, castaneous marks on lateral coxae, distal trochanters and striped on femora, these marks absent in paratype, distal tibiae and tarsi castaneous, except proximal metatarsus of fore leg lighter, amount of castaneous decreasing in posterior tibiae. Fore femora proximal spine castaneous, elongate forming acute angle to femur, secondary spine ochraceous with castaneous tip, narrowly triangular, upright, and small, slightly angled apical spine, ochraceous with castaneous tip, long silvery pile radiating from ridge with spines. Tarsal claws dark castaneous, tibial spurs and comb castaneous with darker tips. Legs covered with long and short silvery pile.

Operculum. Male operculum ochraceous with piceous spot on lateral base, lateral margin angled mediad joining to smoothly rounded posterior margin, posterior medial margin rounded, curving anteromedial margin to base, almost reaching sternite II but not covering tympanal cavity completely. Medial margin extending to middle of hind coxa. Meracanthus ochraceous, broadly triangular with straight tip but curved medial margin, reaching to middle 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 abdominal tergite 1 piceous with castaneous margin to timbal cavity, tergite 2 piceous with dark castaneous posterior to timbal cavity and greenish tawny posterior margin, tergites 3–7 with transverse castaneous region anterior to greenish tawny posterior margin, piceous region reduced in posterior tergites, tergite 8 castaneous anteriorly and greenish tawny posteriorly, tergites 1-7 piceous and tergite 8 piceous with thin transverse castaneous fascia anterior to ochraceous posterior margin in female, auditory capsule castaneous. Timbal cover recurved exposing timbal dorsally, piceous, lateral tergite 2 ochraceous expanding anteriorly to form cover over lateral timbal cavity. Timbal with eleven long and ten intercalary ribs. Female abdominal segment 9 castaneous lighter V-shaped region on dorsal surface enclosing an elongated triangular mark on anterior dorsal midline terminating on dorsal beak, lateral anterior margin and lateral to V-shaped regions darker castaneous, lateral regions piceous extending to base of dorsal beak, ochraceous fascia extending from anteroventral margin lateral to piceous region terminating on posterior margin and enclosing thick piceous fascia along ventral margin, covered with long golden pile on ventral and ventrolateral surfaces. Posterior margin of female abdominal segment 9 straight. Sternites I–II piceous, sternite II with tawny posterolateral margin and ochraceous lateral margin, sternites III–VI castaneous medially, tawny laterally, forming a medial castaneous fascia, sternite VII castaneous with tawny anterolateral margins, sternite VIII U-shaped, radiating long golden pile. Female sternites similarly marked but with central piceous fascia. Epipleurites tawny. 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 slightly diverging straight extension to posterior margin, posterior margin of sternite smoothly arched to lateral surface, castaneous anteriorly to base of posterior extension, ochraceous posteriorly. Long silvery pile radiating from sternites, white pubescence on male sternite I, anterior and posterior sternite II, and anterior sternite III.

Genitalia. Male pygofer castaneous, darker ventrally and dorsally anterior to dorsal beak, with piceous spot on lateral base and dorsal beak, with short silvery pile on ventral margin and posterior dorsal surface, distal shoulder pointed forming a notch lateral to dorsal beak, dorsal beak wide, hollow, broadly triangular, arching to terminus when viewed from the side. Pygofer basal lobe finger-like, extending to about half pygofer length, terminus curving mediad, pygofer upper lobes small, triangular, adpressed to pygofer with lateral central region excavated. Anal styles piceous radiating silvery pile, extending beyond dorsal beak, anal tube castaneous. Uncus lobe castaneous with piceous lateral margin, slightly arched dorsally and ventrally, medial carina on ventral side, lateral margin angled laterad from base, curving to straight extension angled mediad to transverse terminus, dorsal terminus with small, slightly recurved point. Lateral dorsal surface radiating long silvery pile. Aedeagus dark castaneous, with lateral extensions near terminus.

Female gonocoxite IX piceous with castaneous medial margin, gonapophyses castaneous, lighter at proximal base. Gonocoxite X piceous almost extending to length of dorsal beak but not as far as anal styles, with radiating golden pile. Anal styles piceous, anal tube ochraceous.

MEASUREMENTS (MM). N = one male or one female, mean (range). Length of body: male 17.4, female 16.7; length of fore wing: male 23.45, female 20.8; width of fore wing: male 7.7, female 7.15; length of head: male 3.1, female 3.2; width of head including eyes: male 7.2, female 6.6; width of pronotum including suprahumeral plates: male 6.9, female 6.0; width of mesonotum: male 5.2, female 5.0.

DIAGNOSIS. The basic coloration is similar to S. guianensis n. sp. but the species can be distinguished quickly by the two macular regions of the fore wing in S. iguazuensis n. sp. 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 but is also found on basal apical cells 1–3 and on the radiomedial cross vein in S. iguazuensis 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 but is found on basal apical cells 1–3 in S. iguazuensis n. sp. 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 S. boliviaensis n. sp., S. loretoensis n. sp., and S. madredediosensis n. sp.

DISTRIBUTION. The species is known only from the type specimen collected in Misiones Province, Argentina and western São Paulo Province, Brazil in the area of Iguazú Falls .

Figures

FIGURE 7. Selymbria iguazuensis 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.