Selymbria loretoensis, 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 : 432-436

Selymbria loretoensis n. sp.

( Fig. 8 )

TYPE MATERIAL. Holotype. “ PERU: Dept. Loreto, 40 km / NE Iquitos on Amazon / River, Explorama Inn / 22–24– VIII–1992 / Castner, Skelley, et al.” one male ( FSCA) . Paratypes. Same data as holotype, one female ( FSCA), one female ( AFSC); “ PERU: Dpto. Loreto / Quebrada Orán ca 5 km / N Rio Amazonas, 85 km / NE Iquitos, el. 110 m / VI–1984 L.J. Barkley // LSAM / 0297043 ” one female ( LSAM) .

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

DESCRIPTION. Ground color of head and thorax greenish marked with piceous, abdomen piceous marked with castaneous and greenish. Green has faded or was chemically altered to tawny in holotype and one paratype.

Head. Head wider than pronotal collar lateral angles and mesonotum, dorsal head piceous except for midline between median ocellus and frontoclypeal suture, ground color spot on posterior epicranial suture, and anterolateral vertex posterior to supra-antennal plate, castaneous spot on posterior cranial depression, supra-antennal plates ground color except for curved piceous mark extending anterolaterally from posteromedial margin, reduced to spot near posteromedial corner or small medial spot in paratypes, piceous posterior to eye. Short silvery pile posterior to eye, white pubescence on posteromedial eye, short golden pile on vertex in one paratype, denser in sutures. 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 gena and on lorum, white pubescence on ventral head in some paratypes. 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 expanded region of central sulcus except for anterior region near apex and short fascia on midline in center of mark, within transverse grooves and ventroposterior piceous, first four dorsal transverse groove piceous connected medially by fascia lateral to central sulcus, ventroposterior transverse grooves 5–8 ground color with fifth groove piceous in lateral half in one paratypes, white pubescence laterally and posteroventrally, long silvery pile on ventral surface. Anteclypeus piceous, covered with white pubescence. Mentum ground color, medial labium castaneous, lateral and distal labium piceous, tip reaching to anterior of 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 on disk medial to posterior paramedian fissure, with triangular piceous marks on anterior disks on either side of anterior midline, reduced to curved mark in paratypes, extending posteriorly as fascia to connect to posterior mark, piceous anterior disks between 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 that also extends anteriorly to paramedian fissure near center, absent in paratypes. Pronotal collar lightened ground color, short golden pile radiating from lateral margin of lateral part of pronotal collar. 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, trident-shaped mark on disk with tines extending between sigillae, curving fascia between anterior arms of cruciform elevation extending to, encircling and filling scutal depressions, lateral margin and 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 and posterolateral piceous fascia. Metanotum piceous with ground color dorsum and posterior margin. Short golden pile on disk of paratypes, long silvery pile in posterior wing groove, silvery pile on posterior margin, silvery pile between anterior arms of cruciform elevation, on lateral cruciform elevation in paratypes. Ventral thoracic segments ground color except dark castaneous or piceous on 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 ground color at base along with costal margin and radius & subcostal vein to node and subcostal vein distal to node, remaining venation ferruginous except piceous anal vein 2 + 3, becoming piceous in distal veins between apical cells 4–8, ambient vein piceous between apical cells 2–8. Basal cell longer than broad, hyaline with slight greenish tint along radius & subcostal vein and at base. Pterostigma present. Infuscation on distal subcostal vein, radius anterior 1, radius anterior 2 and distal radius posterior, infuscation extending onto ambient vein anterior to radius posterior extending to wing apex, mark on radius posterior reduced in one paratype, second infuscation expanding from middle of subcostal vein across pterostigma, proximal apical cells 1–3 and anterior half of proximal apical cell 4, distal ulnar cells 1 and 2 not reaching bifurcation of median veins 1 and 2 but including entire radial and radiomedial crossveins, expanded anterodistally to connect to distal spot. Basal membrane of fore wing gray with dark gray posterior margin. Venation of hind wing similarly colored with 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.

Legs. Legs ground color, dark castaneous marks on lateral base of middle coxae and lateral hind coxae, distal tibiae edged in castaneous, dorsal metatarsus and mesotarsus, distal pretarsus piceous. Fore femora proximal spine forming acute angle to femur, secondary spine with wider base and sharper apex, upright to femoral axis with slightly curved tip, about as long as primary spine, and small, slightly angled apical spine, all spines ground color with castaneous tips, 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 ground color with piceous spots on lateral base and anteromedial corner, lateral margin curving slightly mediad from base, joining to smoothly rounded posterior margin, medial margin smoothly curved to base, medial margin covering medial tympanal cavity, posterior margin reaching to middle of sternite II covering tympanal cavity completely. Meracanthus ground color with castaneous spot on medial base, triangular with straight tip but curved lateral margin, reaching to middle of sternite II. Female operculum ground color with piceous spot on lateral base, straight lateral and posterior margins, posterolateral corner forming acute angle, terminating medially at medial meracanthus, reaching almost to posterior of sternite II. Female meracanthus ground color with castaneous medial spot, triangular, curving mediad, longer than operculum extending to posterior of sternite II. Opercula covered with white pubescence, denser at base, radiating silvery pile in paratypes.

Abdomen. Tergite 1 with castaneous posterior margin and ground color spot on dorsal timbal cavity margin, tergite 2 piceous with castaneous posterior and lateral margins with greenish spot on ventral timbal cavity margin, tergite 3 piceous dorsally and posteriorly, castaneous anterolaterally and laterally, tergites 4–7 piceous posteriorly, castaneous anteriorly and lateral margins, ground color fascia on lateral posterior margin of tergite 7, tergite 8 castaneous with ground color dorsolateral and lateral posterior margin, female tergites piceous except tergite 8 with castaneous anterolateral region and ground color posterior half, auditory capsule castaneous, tergites covered with silvery pile which also radiates from posterior margin. Timbal cover piceous, recurved exposing timbal dorsally, lateral tergite 2 expanding anteriorly to form small, triangular cover over posterolateral timbal cavity. Timbal with twelve long and eleven intercalary ribs. Female abdominal segment 9 with thin castaneous fascia on dorsal midline, castaneous tawny on either side of midline, castaneous anterolaterally, ground color longitudinal fascia on ventrolateral surface reaching to posterior margin, piceous posterior to anterolateral castaneous region extending to posterior margin and including dorsal beak and stigma, piceous mark on anterior ground color region transverse to dark castaneous fascia extending to posterior margin lateral to base of dorsal beak, and piceous on either side of ventral margin where they converge over gonapophyses, covered with short silvery pile on dorsal and dorsolateral surfaces, long golden pile on ventral and ventrolateral surfaces. Posterior margin of female abdominal segment 9 slightly sinuate. Sternite I piceous, sternite II piceous medially, castaneous posterolaterally with ground color ventrolateral region and piceous lateral margin, sternites III–VI piceous medially forming central fascia bordered by castaneous within ground color posterolateral margin and lateral regions, sternite VII piceous with ground color posterolateral margins margined with castaneous, sternites covered with silvery pile and white pubescence, sternite VIII U-shaped with transverse posterior margin, radiating long golden pile. Female sternites similarly marked. Epipleurites ground color with central castaneous spot. Female sternite VII with a deep medial notch almost reaching anterior margin, V-shaped anteriorly, forming an almost transverse region extending laterally widening the anterior notch continuing straight posteriorly to acutely angled medioposterior margin, posterior extensions are parallel, posterior margin of sternite straight, smoothly curving to lateral surface, piceous on anteromidline, castaneous anterolaterally with dark castaneous spots on either side of anterior midline, most of posterior extension ground color, covered with white pubescence.

Genitalia. Male pygofer dark castaneous, distal shoulder small, forming a right angle, curving smoothly to dorsal beak, dorsal beak piceous, broadly triangular, apex slightly bent when viewed from the side. Pygofer basal lobe elongated, finger-like, lighter colored and curving mediad, bending at approximate right angle away from base, pygofer upper lobes small, flattened with rounded terminus adpressed to distal shoulder. Anal styles piceous with ground color deep lateral surfaces, radiating short silvery pile, extending well beyond dorsal beak, anal tube dark ochraceous. Uncus lobe large, dark castaneous at base becoming piceous distally, dorsally with medial convex region widening towards apex, small recurved spine on either corner of terminus, terminus transverse when viewed from above, ventrally concave with medial carina in center, lateral portion folded ventrally from dorsal surface, base with ventral surface angled toward dorsal surface, ventral margin angling toward apex with sinuate ventral margin when viewed from the side, slightly widening from base, extending with parallel sides almost to terminus where they angle medially. Dorsal, lateral and ventral surfaces radiating long silvery pile. Aedeagus dark castaneous, with curving lateral extensions with lanceolate lateral lobes near terminus.

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

MEASUREMENTS (MM). N = one male or three females, mean (range). Length of body: male 17.3, female 17.60 (17.3–18.2); length of fore wing: male 19.95, female 23.13 (22.6–23.6); width of fore wing: male 7.0, female 7.53 (7.3–7.7); length of head: male 3.1, female 3.23 (3.1–3.3); width of head including eyes: male 6.75, female 7.18 (7.0–7.45); width of pronotum including suprahumeral plates: male 5.8, female 6.42 (6.2–6.75); width of mesonotum: male 4.8, female 5.50 (52.5–5.65).

DIAGNOSIS. 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 without extending on basal apical cells 1–3 and on the radiomedial cross vein as in S. madredediosensis 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. The infuscation is restricted to the radiomedial crossvein in the fore wing of S. danieleae without extending onto the basal apical cells 1–3. 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 has a lateral expansion near the terminus and the medial margins of the posterior notch female sternite VII with are angled mediad in S. boliviaensis n. sp. 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 species is very similar to S. madredediosensis in general appearance. This new species is smaller and there are differences in the genitalia of both males and females in the two species.

DISTRIBUTION. The species is known only from the type series collected in Loreto Province of northern Peru.

Figures

FIGURE 8. Selymbria loretoensis 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.