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

description: Durangona exechopyga n. sp.
(Fig. 1)
TYPE MATERIAL.— Holotype. “ ECUADOR: Pichincha Prov. / Sto. Domingo. Tinlandia Resort / 0º 13’S, 79º 09’W / V–18–24–1997 760m / C. & K. Messenger ” male (UNSM). Paratypes. Same data as holotype, one male and two females (UNSM), one male and one female (AFSC); “ ECUADOR: Pichincha Prov. / Tinlandia; 12 km. E. Sto. / Domingo de los Colorados. / ca. 2500 ft., 11–17–V–1986. / J. E. Eger, coll.” one male (FSCA), one male and one female (AFSC); “Ecuador: Pichincha / Maquipucuna Biol. / Reserve, 2/3– VIII–98 / 1350m. W. Opitz ” one female (FSCA).
REMARKS.— Durangona exechopyga n. sp. is very similar in general appearance to D. tigrina differing most obviously in the shape of the genitalia, the anterolateral pronotal collar and the posterior opening of the timbal cavity. It is a brownish ochraceous (ochraceous green in fresh specimens) species marked with castaneous and fuscous.
The extension of the distal shoulder of the pygofer in this new species is significantly different than the smoothly rounded distal shoulder of D. tigrina. This type of difference has been used in the past as a means to distinguish genera (e.g. Duffels 1977). However, I did not feel it was reasonable to erect a new genus that differed in one or two structures in species that otherwise are almost identical in their morphology and coloration patterns. Instead a new genus can wait until such time as a greater number of species can be found or genetic analyses performed to determine whether the two groups represent two distinct genera.
ETYMOLOGY.—The name is a combination of execho – (Gr. exeches, jutting out, projecting) and – pyga (Gr., pyge, rump, buttocks) in reference to the spine-like extension of the male pygofer.
Description
Ground color of head and thorax is brownish ochraceous, or ochraceous green in fresh specimens, marked with castaneous and fuscous.
Head
Head not as wide as mesonotum, ground color with castaneous mark between ocelli, extending and diverging as fascia to posterior head on either side of midline, extending anteriorly along anterior arms of epicranial suture to anterior vertex and lateral frons, mark extends laterally from anterior arm of epicranial suture to eye margin in some paratypes, triangular castaneous mark posterior to median angle of eye. Ocelli rosaceous, ochraceous in some paratypes, eyes castaneous. Head covered with short golden pile, longer and denser posterior to eye, pile density variable in paratypes. Gena ground color with transverse castaneous fascia between eye and postclypeus, fascia darkness variable in paratypes. Lorum castaneous with ground color medial margin extending onto disk lateral to posteroventral postclypeus. Gena and lorum covered with short golden pile. Postclypeus ground color with medial castaneous fascia posteroventrally, castaneous lateral transverse ridges, and castaneous dorsum, ventrally flattened with central carina, with seven transverse ridges, transverse ridges with anteroposterior corrugations, short golden pile on lateral margin. Anteclypeus ground color with longitudinal mark on either side of midline not reaching anterior margin, with short golden pile. Mentum ground color, labium ground color with distal lateral fascia that is castaneous surrounding piceous, reaching to abdominal sternite I or II. Antennal segments ground color with castaneous distal flagellar segments.
Thorax
Dorsal thorax ground color with castaneous markings. Pronotum with castaneous fascia on either side of midline, wider anteriorly with medial extension posterior to anterior fissure angled laterad from posterior paramedian fissure to ambient fissure where it angles mediad to fuse on the posterior pronotal collar, small castaneous marks in anterior paramedian and lateral fissures, castaneous spot posterior to posterior lateral fissure, curved transverse fascia across lateral disk, expanded, reduced or absent in paratypes, lateral fascia adjacent to lateral ambient fissure in some paratypes. Pronotal collar ground color with sinuate lateral margin, anterior collar extended laterally. Pronotum covered with short golden pile, longer pile on lateral part of pronotal collar in some paratypes. Mesonotum ground color with castaneous submedian sigillae, posterior margin piceous in some paratypes, castaneous mottling in lateral sigillae, scutal depressions within castaneous mark, mark extends medially and fuse on disk, remaining as separate spots in some paratypes, mark extend posteriorly onto anterior cruciform elevation in some paratypes, castaneous mark on posterior mesonotum lateral to cruciform elevation, castaneous mark in posterior wing groove, expanding onto lateral cruciform elevation in some paratypes. Metanotum ground color with castaneous lateral spot. Mesonotum covered with short golden pile, longer on posterolateral and posterior mesothorax. Ventral thoracic segments ground color with variable castaneous markings on each segment in the type series ranging from no marking to completely castaneous, covered with short golden pile.
Wings
Fore wing and wings hyaline, venation ground color becoming castaneous distally, posterior anal vein 2 + 3 piceous, castaneous spot on proximal median vein, on arculus between median vein and cubitus anterior, on base of cubitus posterior + anal vein 1, on radius anterior and subcostal veins distal to node. Basal cell hyaline, pterostigma present, longitudinal infuscation in apical cells, spots of infuscation on base of cubitus anterior, along entire cubitus anterior 2, on median vein 3+4 at nodal line, on median vein prior to divergence of median vein 1+2, base of radius posterior, entire radiomedial crossveins extending onto median vein 1 and radius posterior, entire radial crossvein extending onto radius posterior and radius anterior to divergence with radius anterior 1 and distally toward apex, distal radius anterior 2 extending to wing apex, and on marginal area of fore wings, basal membrane of fore wing grayish. Hind wing venation ground color, castaneous base of anal vein 2. Anal cell 3 and anal cell 2 along anal veins 2 and 3 grayish.
Legs
Legs ground color marked with castaneous. Coxae, trochanters and femora striped with castaneous, tibiae with two annular castaneous mark one near proximal end and one near distal end, distal mark twice as wide and missing from posterior tibiae, tarsi castaneous except ground color proximal pretarsus, pretarsal claws castaneous with darker tips. Fore femora proximal spine small, adpressed to femur, secondary spine triangular, slightly angled distally, tertiary spine very small, all spines castaneous. Tibial spurs and combs castaneous. Legs radiating long golden pile. Meracanthus extended triangle, tip slightly curved mediad, ground color with castaneous base, reaching middle of medial operculum in male, female meracanthus extending to posterior sternite II.
Opercula
Male operculum ground color with castaneous base, covered with short silvery, lateral margin straight forming obtuse angle mediad, smoothly curved posterior margin, rounded medial margin, not meeting medially, reaching slightly medial to medial meracanthus, not covering tympanal cavity, reaching posteriorly to posterior of sternite I. Female operculum and meracanthus similarly shaped and colored, reaching to anterior of sternite II.
Abdomen
Abdominal tergites ground color, greenish or with greenish posterior in some paratypes, castaneous mark on medial margin of timbal cavity and lateral tergite 2, dorsal tergite 2 with castaneous spot in some paratypes, tergite 3 anterior margins along of dorsolateral timbal cavity, castaneous dorsoanterior region on tergite 8, anterolateral castaneous spot on tergites 3–8, tergites covered with golden pile, piceous pile on dorsal tergites 2–6 moving laterad in posterior tergites forming a V-shaped piceous fascia on the dorsal abdomen, piceous pile on lateral tergites 4–6. Timbal exposed, white with three castaneous ribs, posterior timbal cavity formed by ridge on sternite 2. Male sternites ground color, sternites VI and VII castaneous, castaneous reduced in some paratypes, castaneous spot in auditory capsule, sternite VII with transverse posterior margin, sternite VIII with open U-shape when viewed from posterior, short golden pile radiating from sternites, longer radiating from sternite VIII, epipleurites ground color strongly reflexed dorsally. Female tergites ground color, sternites II–VII with transverse castaneous fascia on either side of midline, becoming smaller in posterior sternites so sternite VII with lateral castaneous spot. Female sternite VII with small V-shaped medial notch in posterior extension of posterior margin reaching to level of lateral posterior margin, notch curving to extension beyond arching straight posterior margin. Female abdominal segment 9 ground color with three incomplete dorsolateral and lateral fascia extending from anterior margin, castaneous mark across stigma, radiating long golden pile, denser on ventral surface. Dorsal beak very short, anal styles castaneous. Posterior margin of abdominal segment 9 smoothly curved.
Genitalia
Male pygofer ground color, dorsal beak absent. Anal styles light castaneous. Pygofer basal lobe about halflength of pygofer, narrow, adpressed to pygofer, angled laterad from base, with rounded terminus. Upper pygofer lobes absent. Distal shoulder extended into elongated triangle angled laterad from base, terminus curved slightly mediad. Claspers absent. Uncus short, lateral branch of uncus recurving beneath medial uncus forming a V-shaped notch on midline. Aedeagus dark castaneous with a wide base narrowing to a small tube with two terminal spines.
Female gonocoxite IX ground color. Gonapophyses IX and X castaneous. Ovipositor sheath extends beyond dorsal beak. Long golden pile radiating from ovipositor sheath.
MEASUREMENTS (MM).—N = five males or five females, mean (range). Length of body: males 15.88 (15.00– 16.35), female 18.54 (17.30–19.00); length of fore wing: males 24.59 (23.45–25.75), female 24.66 (23.90–25.35); width of fore wing: males 8.08 (7.70–8.45), female 7.78 (7.40–8.10); length of head: males 2.43 (2.30–2.60), female 2.49 (2.25–2.70); width of head including eyes: males 4.40 (4.25–4.50), female 4.66 (4.55–4.80); width of pronotum including suprahumeral plates: males 6.18 (5.90–6.40), female 6.47 (6.25–6.60); width of mesonotum: males 5.11 (5.00–5.20), female 5.17 (5.00–5.30).
DIAGNOSIS.— Durangona exechopyga n. sp. is very similar to D. tigrina in size and general body coloration pattern. This new species can be distinguished from D. tigrina by the anterolateral extension of the pronotal collar, the male operculum that reaches slightly medial to medial meracanthus, the posterior timbal cavity is formed as a ridge rather than a curled back rim, the distal pygofer shoulder is extended into a point almost as long as the anal styles, the median uncus lobe is short, the lateral branches of the uncus recurve under the median uncus rather than forming a bifurcated terminus which are characteristic of the new species.
DISTRIBUTION.—The species is known only from the type series collected from several localities in the province of Pichincha in north-central Ecuador.
description: Published as part of Sanborn, Allen F., 2020, The cicadas (Hemiptera: Cicadidae) of Ecuador including the description of five new species, a new subtribe, four new synonymies, and fifteen new records, pp. 1-80 in Zootaxa 4880 (1) on pages 8-10, DOI: 10.11646/zootaxa.4880.1.1, http://zenodo.org/record/4425522