Brevialavenosa aurepilosa Sanborn, 2021

Sanborn, Allen F., 2021, A New Genus and Species of Neotropical Taphurini Distant, 1905 (Hemiptera: Cicadoidea: Cicadidae: Cicadettinae) from Brazil with a Note on the Taxonomic Position of Prosotettix Jacobi, 1907, Proceedings of the Entomological Society of Washington 123 (1), pp. 190-198 : 194-197

Brevialavenosa aurepilosa Sanborn , new species

http://zoobank.org/997144F9-AFA4- 46F8-8853-83CCC0097AED

( Figs. 1–8 )

Diagnosis.—The generic characters can be used to distinguish the only known species of the genus. The size, short radial crossvein, apical forewing infuscation, and genitalia will quickly distinguish it from other members of the tribe.

Description.—Ground color of head piceous marked with castaneous and tawny, thorax castaneous marked with tawny and piceous, abdomen castaneous marked with piceous. Body covered with long golden pile.

Head ( Figs. 1, 2 ): Head wider than pronotal collar lateral angles and mesonotum, dorsal head piceous except for triangular tawny spot on posterior epicranial suture and castaneous mark extending from medial to lateral ocelli anterolaterally along epicranial suture anterior arm to posterolateral corner of frontoclypeal suture. Dorsal head covered with long golden pile, denser posterior to eye. Ocelli golden in holotype, rosaceous in paratype, eyes testaceous. Ventral head piceous except tawny fascia, castaneous in paratype, on gena along anterior lorum, anterior lorum along gena, and castaneous gena along lateral.lorum, piceous in paratype, gena, lorum and ventral eye with long white pile. Postclypeus with seven transverse grooves, central sulcus narrow, dorsum castaneous with darker median fascia and anterior margin, ventrum dark castaneous with tawny lateral and posterior margins, castaneous in paratype, white pile within transverse grooves and along lateral margin. Anteclypeus dark castaneous with tawny anteromedial margin, covered with white pile. Mentum tawny, proximomedial labium castaneous, lateral and distal labium piceous, tip reaching to anterior hindcoxae, with sparse short golden pile, denser and longer near tip. Scape and pedicel castaneous with distal annular tawny mark, flagellar segments light castaneous.

Thorax ( Figs. 1, 2 ): Dorsal thorax castaneous marked with piceous and tawny, covered with golden pile. Pronotum castaneous, dark castaneous fascia on either side of tawny midline posteriorly expanding into elongated triangle anterior to ambient fissure with medial extension fusing in ambient fissure and expanding anteriorly into piceous triangular mark fusing on anterior midline, crescent shaped piceous mark on central disk between paramedian and lateral fissures, lateral fissure piceous, anterior lateral disk piceous, lateral and posterior ambient fissure piceous. Pronotal collar castaneous, dark castaneous spot on pronotal collar lateral angle adjacent to ambient fissure, anterior lateral pronotal collar piceous. Mesonotum castaneous, submedian and lateral sigillae piceous, medial lateral sigillae dark castaneous, parapsidal suture tawny, scutal depressions piceous, midline and posterior to anterior arms of cruciform elevation dark castaneous, wing dark castaneous anteriorly with lighter posterior margin. Metanotum light castaneous. Longer golden pile on lateral and posterior mesonotum, between anterior arms of cruciform elevation, on lateral cruciform elevation, in posterior wing groove, anteriorly between the arms of the cruciform elevation, and radiating from posterior metanotum margin. Ventral thoracic segments light castaneous except piceous mark on lateral anepisternum 2, darker castaneous anepimeron 2, basisterna 2 and 3, covered with long white pile.

Forewings and hindwings ( Fig. 1 ): Forewings hyaline with eight apical cells, hindwings hyaline with six apical cells. forewing venation castaneous proximally, becoming piceous distally except piceous base and posterior of anal vein 2+3. Pterostigma present. Infuscation on radial and radiomedial crossveins, distal radius anterior 2, distal radius posterior, ambient vein and wing margin between radius anterior 1 and radius posterior. Basal membrane of forewing dark gray. Hindwing venation castaneous proximally becoming piceous distally except dark castaneous anal vein 3 with piceous spot on base. Basal 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 in distal anal cell 2 at terminus of anal vein 2.

Legs: Legs light castaneous, coxae, trochanters, and femora striped with dark castaneous, proximal tibiae dark castaneous, distal pretarsus and distal pretarsal claws dark castaneous. Forefemora proximal spine light castaneous, longest spine, forming acute angle to femur, secondary spine castaneous, slightly angled to femoral axis with curved tip, and small, castaneous apical spine, about half as long as secondary spine, long white pile radiating from coxae, trochanters and femora, long golden pile radiating from tibiae and tarsi. Meracanthus ochraceous with castaneous base, broadly triangular, reaching to middle of abdominal sternite I.

Opercula ( Fig. 4 ): Male opercula castaneous covered with dense white pile, long golden pile radiating from posterior margin, lateral margin curved mediad to curved posterior margin, medial margin semilunar, anteromedial margin parallel to posteromedial margin, reaching to anterior margin of sternite II and covering tympanal cavity only posteromedially. Medial margin extending to lateral abdominal sternite I.

Abdomen ( Figs. 1, 3 ): Male tergites light castaneous becoming darker in posterior segments with piceous spot on anterior dorsolateral tergite 8, fusing to single mark in paratype, tergite 2 posterior timbal cavity margin piceous margined with dark castaneous, tergites covered with long golden pile, long piceous pile on dorsolateral tergite 5. Timbal cover absent exposing timbal completely, timbal with twelve long ribs, posterior strongly angled mediad. Sternites I and II dark castaneous covered with dense white pile, auditory capsule piceous covered with white pile, sternites III–VI light castaneous, sternite IV with darker posterior margin, sternite VI with medial dark castaneous mark expanding posteriorly, sternite VII elongated with medial dark castaneous mark expanding to cover posterior half of sternite and transverse posterior margin, sternite VIII open U-shaped when viewed from posterior with curved posterior margin. Epipleurites light castaneous. Sternites and epipleurites with dense, long white pile.

Male genitalia ( Figs. 5–8 ): Male pygofer dark castaneous with piceous ventral and anterodorsal margins, covered with short golden pile, longer and denser on ventral surface, distal shoulder small, straight, curving smoothly to dorsal beak, dorsal beak triangular with pointed apex, arching to terminus when viewed from the side. Pygofer upper lobe small, flat, curled mediad, hidden by long golden pile. Pygofer basal lobe large, flattened, angled laterally from base, adpressed to pygofer, radiating long golden pile from medial margin and apex, apex swollen, forming point, extending less than half pygofer length. Claspers well developed, curving mediad from base almost meeting along midline to support aedeagus, medial sections parallel with rounded termini, Anal styles dark castaneous radiating long golden pile, not as long as dorsal beak, anal tube dark castaneous. Uncus absent. Aedeagus dark castaneous, with ochraceous terminal membrane and recurving spine-like lateral extensions near terminus.

Female.—Unknown.

Measurements (mm).—N = 2 males, mean (range). Length of body: 16.03 (15.70–16.35); length of forewing: 20.83 (20.80–20.85); width of forewing: 7.13 (6.95–7.30); length of head: 2.98 (2.95– 3.00); width of head including eyes: 5.95 (5.75–6.15); width of pronotum including suprahumeral plates: 5.33 (5.30–5.35); width of mesonotum: 4.60 (4.50–4.70).

Material examined.— Holotype male: “ BRAZIL: Rondonia 62 / km SW Ariquemes , nr / Fzda. Rancho Grande / 4– 16-XI-1997 JE Eger ” ( FSCA). Paratype: 1 male same data as holotype ( AFSC).

Distribution.—The species is only known from the type locality in Rondonia, Brazil.

Etymology.—The name is a combination of aure – (L. aureus, golden) and – pilosa (L. pilosus, hairy) in reference to the long, golden pile covering the body of the species.

Remarks.—The only New World Taphurini genus to have more than one known species is Taphura ( Sanborn 2017) . The generic characters can be used to distinguish this only known species of Brevialavenosa new genus. In particular, the short forewing radial crossvein, apical infuscation, curving opercula, and aedeagus with the distal recurved spines are rapid means to distinguish the species from others in the tribe.

Figures

Figs. 1–8. Brevialavenosa aurepilosa Sanborn, new genus, new species. 1, Holotype male habitus. Scale bar = 2 cm. 2, Holotype male dorsum. Scale bar = 2 mm. 3, Holotype male timbal. Scale bar = 1 mm. 4, Paratype male operculum. Scale bar = 2 mm. 5, Paratype male lateral view of genitalia. Scale bar = 1 mm. 6, Paratype male posterior view of genitalia. Scale bar = 1 mm. 7, Paratype male aedeagus. Scale bar = 1 mm. 8, Paratype male claspers. Scale bar = 1 mm.