Guyalna dyticamazona Sanborn 2020, n. sp.
Creators: name: Sanborn, Allen F.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadidae
Guyalna
Guyalna dyticamazona

description: Guyalna dyticamazona n. sp.
(Fig. 4)
Fidicina brisa (non Walker) Jacobi 1951: 89.
Fidicinoides brisa (non Walker, in part) Sanborn, Moore & Young 2008: 17.
Fidicinoides brisa (non Walker) Sanborn 2010: 1590.
Dorisiana brisa (non Walker, in part) Sanborn 2013: 201.
Guyalna brisa (non Walker, in part) Sanborn 2016b: 437, Fig. 6B.
TYPE MATERIAL. Holotype. “ PERU: Loreto Dept., / Explorama Lodge, 50 mi. / NE Iquitos on Amazon R. / 12–19- III-1988. / J. E. Eger, coll.” male (FSCA). Paratypes. Same data as holotype, two males (FSCA), two males (AFSC); “ PERU: Dept. Loreto, 160km / NE Iquitos, Explornapo / Camp, 2 km from Rio Napo / on Rio Sucuaari; 27–31- / VIII-1992; Castner & / P.Skelley; at light ” one male (AFSC); “ PERU: Loreto Prov. / Rio Nanay / 3–11 April 2004 / M. Miranda coll.” two males (AFSC); “ Peru near Pevas / along Amazon River / at lights on river boat / 2 OCT 1994 / leg. Robert R. Bloye ” one male (AFSC); “ along Rio Apayacu, / Loreto Prov., Peru / April 20–21, 1987 / P.J. Clausen ” one male (AFSC); “ Hyutanahan / Rio Purus / Brazil / S.M. Klages // Feb. / 1922 // Carn. Mus. / Acc. 6963” 30 males (CMNH), three males (AFSC); “ Nova Olinda / Rio Purus / Brazil / S.M. Klages // June / 1922 // Carn. Mus. / Acc. 6962” one male (AFSC); “ COLOMBIA: Dept. of / Amazonas, Leticia, / Amazonas River / 14- VII-1978 / Blacklight trap / Mac A. Tidwell ” one male (FSCA); “ COLOMBIA: Dept. of / Amazonas, Leticia, / 16- I-73 / C.R. Gilbert / Blacklight Trap ” one male (AFSC); “ COLOMBIA: Amazonas Dept. / Leticia Imani Sta. 4.19° / S, 69.93°W. 25–28. viii. / 1997 B. Brown. G. Kung // LACM ENT 403480 ” one male (LACM); “ COLOMBIA / AMAZONAS / Río Putomayo / Puerto Arica / at light 8:30 PM / 9 July 1978 / M.A. Tidwell ” three males (FSCA); “ COLOMBIA / AMAZONAS / Río Putomayo / Puerto Arica / at light / 10 July 1978 / M.A. Tidwell ” two males (AFSC); “ COLOMBIA: Tolima / Mariquita / XII-1979 / V. Bruzzese ” one male (AFSC); “ COLOMBIA: Rio Putomayo / Puerto Arica, 10-VII-1978 / Mac A. Tidwell / Malaise Trap ” one male (AFSC).
REMARKS. The new species is similar to G. brisa (Walker, 1850) but has significantly different genitalia, opercula and timbal cover than the proposed but unofficial neotype of that species (illustrated in Ruschel 2015) and differs in geographic distribution from the new species. The Peruvian reference to the species for G. brisa by Jacobi (1951) is considered a misidentification due to the similar appearance of the habitus of this new species to G. brisa. The Jacobi specimen is reported from Iquitos, the capital of Loreto Province. Specimens of the type series were also collected in Loreto Province supporting considering his specimen a synonym of this new species.
ETYMOLOGY. The name is a combination of dytic - (Gr. dytikos, western) and - amazona in reference to the distribution of the species in the western Amazonian region.
DESCRIPTION. Ground color dark tawny marked with piceous, castaneous and green.
Head. Head wider than mesonotum not as wide as lateral angles of pronotal collar, dark tawny with transverse piceous fascia extending through ocelli between eyes and surrounding eye margin, frons and medial half of supraantennal plate except medial and anterior margins piceous, piceous posterior to eye. Dorsal head and dorsal postclypeus covered with short golden pile, short piceous pile on dorsal postclypeus in some paratypes, longer golden posterior to eye. Ocelli red, rosaceous or ochraceous in some paratypes, eyes castaneous, ochraceous in some paratypes. Ventral head dark tawny with piceous fascia on gena between eye and postclypeus, piceous ventral to eye, lorum piceous with tawny lateral margin. Postclypeus centrally sulcate not reaching posteromedial margin or apex, dark tawny, slightly more than anterior half of ventral sulcus, lateral margin, eleven transverse grooves, and posterior of dorsal midline piceous. Anteclypeus piceous with dark tawny carina expanding to include posterior margin. Short silvery and long white pile on lorum, gena, lateral postclypeus and lateral anteclypeus, white pubescence on lateral postclypeus, within transverse grooves and within central sulcus. Mentum dark tawny, labium dark tawny at base, becoming piceous distally. Rostrum reaching to posterior coxae. Scape dark tawny, remaining antennal segments piceous.
Thorax. Dorsal thorax dark tawny marked with piceous, castaneous and green. Prothorax with piceous fascia on either side of posterior midline, expanding posteriorly and fusing in posterior ambient fissure, transverse fascia in anterior fissure not meeting on midline, extending around lateral ambient fissure to posterior of lateral fissure, anterior paramedian fissure piceous, posterior castaneous, lateral fissure castaneous, short golden pile and short piceous pile on disc and within fissures, only within fissures in some paratypes. Pronotal collar greenish-tawny, green in some paratypes, piceous in lateral ambient fissure expands onto anteromedial lateral part of pronotal collar in some paratypes, covered with short golden pile and short piceous pile. Mesothorax dark tawny, greenish-tawny in some paratypes, submedian sigillae piceous except for posteromedial margin, anterior lateral sigillae piceous proportion reducing laterally, curving transverse castaneous mark along anterior arms of cruciform elevation, scutal depressions castaneous, wing groove ochraceous except dark tawny anterolateral margin and piceous spot on anteromedial corner. Short golden pile and short piceous pile on disc, longer and denser pile on lateral and posterior mesonotum, in wing groove, on lateral cruciform elevation, and between anterior arms of cruciform elevation, dense, pile reduced in some paratypes. Metanotum dark tawny with castaneous anterolateral corner and ochraceous posteromedial margin, with long, dense golden pile. Ventral thoracic segments dark piceous except dark tawny anepisternum 2, lateral anepimeron 2, and most of katepimeron 2. Thoracic sternites covered with white pubescence and long white pile.
Wings. Fore wing and wings hyaline, bronzing in apical cells and on wing margin. Venation dark ochraceous at base becoming piceous distally, costal margin, radius & subcostal vein, radius anterior and radius anterior 1 castaneous, posterior of proximal half of anal vein 2 + 3 piceous. Basal cell dark ochraceous, almost transparent along cubitus anterior with castaneous mark in proximal corner and along arculus, pterostigma extending to radial crossvein, infuscation in proximal clavus, basal membrane of fore wing grayish, posterior darker. Hind wing venation proximally castaneous becoming piceous distally except ochraceous cubitus anterior, cubitus posterior, anal vein 1, and anal vein 3 piceous. Anal cell 3 and anal cell 2 along anal veins 2 and 3, anal cell 1 along anal vein 2 grayish, infuscation at base of proximal hind wing cells and along grayish in anal cells 1 and 2.
Legs. Legs dark tawny, coxae, fore trochanter, and femora striped with castaneous and piceous, middle and hind trochanters piceous, femora with ochraceous distal ends, tibiae becoming castaneous distally, tarsi and pretarsal claws piceous except castaneous proximal hind pretarsus. Fore femora with finger-like proximal spine adpressed to femur, secondary spine angled, shorter than primary spine but with broader base, tertiary spine very small, parallel to secondary spine, all spines dark tawny with piceous tips. Tibial spurs and tibial combs castaneous with piceous tips. Legs with long golden pile, and white pubescence on coxae and trochanters, pubescence denser in some paratypes. Meracanthus pointed, piceous with ochraceous margin, not reaching posterior opercular margin extending to anterior of sternite II.
Opercula. Male operculum piceous at base an on posterolateral margin, dark castaneous medially separated from ochraceous posterolateral corner by lighter broad castaneous fascia, anterior and lateral margins, area lateral to meracanthus domed, medial margin arching ventrally producing sinuate operculum, covered with white pubescence at base, denser in some paratypes, lateral margin angled mediad near base, straight lateral margin to rounded posterolateral margin forming an approximate right angle between posterolateral and posterior margin, posterior margin sinuate with central region bent ventrally, medial margin curved, opercula almost meeting medially, reaching to anterior of sternite II, barely covering tympanal cavity medially not covering tympanal cavity posterolaterally.
Abdomen. Abdominal tergites piceous, tergite 1 edged posteriorly with dark tawny, tergites 2–8 with piceous anterior margin, tergite 2 piceous posterolaterally, piceous on tergites 3–6 expanding on dorsolateral tergites with major extension more lateral in posterior tergites producing a piceous arch across the dorsal abdomen, tergite 8 with piceous mark extending across dorsolateral surface and curving laterad to lateral margin just anterior to posterior margin, tergite 3 with castaneous dorsum posterior to piceous, tergites covered with long golden pile and long piceous pile, golden pile on tawny and castaneous areas, piceous pile on piceous areas, golden pile on posterolateral timbal cover, pile reduced or denser in some paratypes. Timbal cover castaneous dorsally, dark tawny ventrally with piceous posteromedial margin of timbal cavity and posterolateral corner, with dorsolateral margin smoothly curving around posterior timbal cavity, incomplete exposing timbal dorsally, anterolateral margin rounded, apex curved mediad, ventral margin straight, parallel to long body axis. Timbal white with dark castaneous markings visible through opening in timbal cover. Male sternite I piceous, sternite II piceous anteriorly, posterolaterally and posterior margin with castaneous midline, sternite III castaneous, sternites IV–VI tawny with darker midline and translucent, male sternite VII castaneous, sternite VIII dark tawny with castaneous dorsoanterior margin with U-shaped notch posteriorly, long golden pile radiating from sternites, shorter piceous pile on midline of sternites III–VI and all of sternite VII, epipleurites castaneous except for tawny posterior epipleurite 7 and anterior epipleurite 8, sternites and epipleurites covered with white pubescence, denser in some paratypes.
Genitalia. Male pygofer castaneous dorsally, dark tawny anterolaterally and anteroventrally with a piceous fascia anterolaterally and a piceous distal shoulder, basal lobe tawny, base of uncus and anal styles castaneous, distal uncus piceous. Dorsal beak absent, long golden pile radiating from distal shoulder, denser pile radiating from medial posteroventral margin. Pygofer basal lobe medial margin angled laterally from base to middle where it bends and distal basal lobes become parallel, distal margin straight forming acute angle from pointed terminus, extending twothirds of pygofer length, distal basal pygofer lobe with short golden pile. Uncal dorsal crest recurved with rounded terminus. Lateral branch of uncus smoothly curved from dorsal crest with rounded apex, posteromedial margin curved meeting under the median uncus lobe to surround aedeagus, with short golden pile. Aedeagus castaneous with a series of small piceous spines proximal to the lighter terminal membrane and one apical spine.
Female is unknown.
MEASUREMENTS (MM). N = ten males, mean (range). Length of body: 27.28 (24.90–29.75); length of fore wing: 40.26 (39.15–41.70); width of fore wing: 12.25 (11.95–12.70); length of head: 4.16 (4.05–4.30); width of head including eyes: 10.96 (10.45–11.50); width of pronotum including suprahumeral plates: 11.83 (11.45–12.25); width of mesonotum: 10.02 (9.70–10.55).
DIAGNOSIS. The majority of species of Guyalna can be distinguished from Guyalna dyticamazona n. sp. by combination of the absence of bronzed fore wings, infuscated basal areas of the wings, infuscation on the radial and radiomedial crossveins, or larger (greater than 30 mm) or smaller (less than 25 mm) body size, or completely piceous lateral sigillae. The only species to have hyaline wings and piceous markings forming an arch on the dorsal abdomen are G. brisa (Walker, 1850), G. densusa Boulard & Martinelli, 2011, and G. variegata (Sanborn, 2005) and this new species shares characteristics all of these species. Specimens of G. densusa have lateral pronotal margins that are almost parallel and the abdomen expands laterally until segment 5 prior to reducing to the posterior terminus rather than having the anteriorly narrowing pronotum and parallel sides of the anterior abdominal segments. Similarly, G. variegata is green rather than brown, has three transverse piceous fasciae on the head, lacks piceous in the pronotal fissures, and lacks piceous markings on the anterior of the second abdominal tergite. Specimens of G. distanti also exhibit piceous arches on the dorsal abdomen but the piceous is found only along the parapsidal suture rather than the entire submedian sigillae being completely piceous and the distal fore wings are bronzed in that species.
The most similar species is G. brisa as it appears specimens of this new species have been misidentified as G. brisa historically (Jacobi 1951; Sanborn et al. 2008; Sanborn 2010; 2016a). The holotype of Cicada brisa is missing (Sanborn 2016a) and the species is currently represented in the BMNH by the holotype of the synonymized Fidicina amazona Distant, 1892a. Guyalna dyticamazona n. sp. can be distinguished from G. brisa by the dense golden pile and piceous markings on the dorsal abdomen that are greater in G. dyticamazona n. sp., the wider lateral pronotal collar in the new species, the four longitudinal fasciae on the pygofer of G. brisa, the castaneous legs of the new species rather than the olivaceous legs of G. brisa, fore wing apical cell 3 is longer than apical cell 1 in the new species but of equal length in G. brisa, and the male opercula do not meet on the midline in the new species but do in G. brisa. More importantly, the male genitalia differ in that the lateral branch of the uncus is recurved in the new species extending only as far as the uncal dorsal crest while the lateral branch of the uncus forms an oblique angle to the uncal dorsal crest with the majority of the lateral branch of the uncus extending beyond the uncal dorsal crest when viewed from the side.
DISTRIBUTION. The species is known from western Amazonian regions being collected in several localities within Loreto Province, Peru, Amazonas Province, Colombia and the State of Amazonas, Brazil. Jacobi (1951) reported the species (as G. brisa) from Iquitos, the capital of Loreto Province.
description: Published as part of Sanborn, Allen F., 2020, The cicadas (Hemiptera: Cicadidae) of Peru including the description of twenty-four new species, three new synonymies, and thirty-seven new records, pp. 1-129 in Zootaxa 4785 (1) on pages 35-37, DOI: 10.11646/zootaxa.4785.1.1, http://zenodo.org/record/3862255