Yanga mahajangaensis Sanborn 2021, n. sp.
Creators: name: Sanborn, Allen F.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadidae
Yanga
Yanga mahajangaensis

description: Yanga mahajangaensis n. sp.
(Fig. 1)
Type material.— Holotype. “ MADAGASCAR: Mahajanga / Prov: Parc National Tsingy / de Bemaraha, 10.6 km ESE / 123º Antsalova, elev 150m / 16–20 November, 2001 / 19º 42’ 34” S 44º 43’ 5” E / coll; Fisher, Griswold et al. / California Acad. of Sciences / at light in tropical dry forest / on Tsingy, BLF4431 // CASENT / 3007745” male (CASC) (CASTYPE number 20141). Paratype. “ MADAGASCAR: Mahajanga / Prov: Parc National Tsingy / de Bemaraha, 10.6 km ESE / 123º Antsalova, elev 150m / 16–20 November, 2001 / 19º 42’ 34” S 44º 43’ 5” E / coll; Fisher, Griswold et al. / California Acad. of Sciences / at light in tropical dry forest / on Tsingy, BLF4431 // CASENT / 3007746” one female (AFSC).
Description
Ground color dark ochraceous marked with piceous and castaneous. Ochraceous may be green in fresh specimens.
Head
Head wider than mesonotum, ground color with transverse piceous fascia expanding along eye margin, expanding to enclose ocelli and frons, piceous fascia along suture of supra-antennal plate and anterior vertex, anterior and posterior cranial depressions piceous, piceous posterior to eye expanding onto posterolateral vertex. Silvery pile in epicranial suture anterior arm and frontoclypeal suture, longer and denser posterior to eye. Ocelli ochraceous in holotype, rosaceous in paratype, eyes tawny. Ventral head ground color with transverse piceous fascia between eye and postclypeus, expanding medially to connect to fascia along suture of supra-antennal plate and anterior vertex, castaneous spot on anterior head between medial piceous fascia and eye, lorum ground color with piceous anteromedial margin expanding across posterior lorum, long white pile on medial gena and lateral lorum, gena and lorum radiating long golden pile. Postclypeus ground color, posteriorly widening piceous fascia on dorsum, central sulcus with piceous fascia not connecting to dorsal fascia, transverse fascia across apex including six transverse grooves, 13 transverse grooves, long white pile and radiating long golden pile on lateral postclypeus. Anteclypeus piceous except ground color carina, medial anterior margin and posterior margin, radiating long golden pile. Mentum ground color, labium ground color at base becoming castaneous with lateral piceous fascia, rostrum radiating long golden pile, reaching to posterior hind coxae. Scape piceous with distal annular castaneous mark, pedicel and first flagellar segment piceous, remaining antennal segments castaneous.
Thorax
Pronotum ground color with piceous markings, transverse piceous fascia along anterior margin not reaching anterior of paramedian fissures, expanding posteriorly slightly on either side of midline, piceous in paramedian fissure, castaneous extending posteriorly across disk, piceous in anterior lateral fissure, castaneous in posterior lateral fissure connecting to incomplete castaneous mark in posterolateral ambient fissure connecting to piceous lateral mark with curved piceous mark extending anteriorly onto lateral disk, triangular mark on either side of midline in posterior ambient fissure, reduced to teardrop-shaped mark in paratype. Pronotal collar ground color, pronotal collar lateral angle with castaneous margin. Pronotum with long white pile laterally and short silvery pile on lateral pronotal collar. Mesonotum ground color with piceous submedian sigillae, piceous anterior and lateral lateral sigillae, inverted heart-shaped mark on central disk, triangular in paratype, curved piceous mark from scutal depression onto anterior distal anterior arm of cruciform elevation extending medially along anterior of anterior arm of cruciform elevation, marks not meeting medially, piceous mark in anterior of lateral cruciform elevation connecting to piceous mark on posteromedial mesothorax, short fascia along middle of medial groove margin, expanded over posterior half of margin in paratype. Metanotum ground color with piceous anterior margin. Long white pile along anterior margin, on posterior margin, very dense in wing groove. Ventral thoracic segments ground color, piceous marks on anepisternum 2, basisternum 2, basisternum 3, medial and lateral episternum 3, castaneous marks on lateral anepisternum 2, epimeron 2, trochantin 2, katepimeron 2, and trochantin 3, radiating with long golden pile, shorter white pile on anepisternum 2 and katepisternum 2.
Wings
Fore wings and hind wings opaque with eight and six apical cells respectively. Venation ground color basally, becoming castaneous distally, piceous spot on proximal cubitus posterior + anal vein 1, castaneous posterior on anal vein 2 + 3. Opaque basal area whitish ochraceous, ulnar cells, medial cell and distal cubital cell and apical cells marked with castaneous and gray, infuscation on radial, radiomedial and medial crossveins, spots on distal veins separating apical cells, and spots on junction of distal veins separating apical cells and ambient vein. Pterostigma absent. Basal membrane of fore wing and all but proximal corner of wing margin gray. Hind wing ochraceous basally becoming dark castaneous distally, castaneous in distal cubital, radial, medial, cubital and anal cells 1 and 2, expanding in anal cells, and all but proximal apical cells 4 and 6, venation ground color basally becoming castaneous distally. Entire anal cell 3, anal cell 2 along anal veins 2 and 3 gray.
Legs
Legs ground color, piceous spot on lateral coxae, femora striped with castaneous, castaneous spot on proximal tibiae, distal tibiae castaneous, tarsi castaneous except ground color dorsoproximal pretarsus, pretarsal claws ground color with piceous tips. Fore femora with primary spine very short, adpressed to femur, secondary spine short, upright. Legs radiating long golden pile. Meracanthus an elongated triangle, ground color with dark castaneous base, extending over anterior margin of operculum to middle of sternite I in male and posterior sternite II in female.
Operculum
Male operculum hemispherical, dark castaneous with piceous anterior and lateral margins, base of lateral margin straight, lateral and posterior margins smoothly curved, medial margin rounded to curved anteromedial margin, reaching to anterior of sternite II, medial margins overlapping, sparse, long golden pile radiating from operculum. Female operculum similarly colored, triangular with rounded apex, reaching medially to lateral extension of meracanthus, posteriorly to posterior of sternite II.
Abdomen
Abdominal tergites 1 dark castaneous with ground color lateral margin, tergites 2–7 dark castaneous with ground color posterior margin, amount of ground color decreasing in posterior segments, tergite 8 dark castaneous, dark castaneous replaced with piceous in paratype, tergites 2–7 with white pile laterally, tergite 8 radiating long golden pile. Timbal cover almost complete, timbal cavity completely covered except for small dorsal opening, ochraceous, hemispherical, domed, reaching anteriorly to posterior metanotum and ventrally to operculum. Male sternite I castaneous with ground color posterior margin, sternite II castaneous except ground color posterior to middle of tympanal cavity, auditory capsule piceous, sternites III–VIII castaneous with ground color posterior margin, ground color expanding over most of sternites VII and VIII, spiracles white. Epipleurites 3–6 castaneous with ground color posterior margin, epipleurite 7 completely castaneous. Sternites and epipleurites radiating sparse, long golden pile, denser on sternite VIII. Sternite open U-shaped when viewed from posterior. Female sternite VII castaneous anteriorly and laterally, ground color posteriorly with single, posterior triangular extensions on either side of midline forming short V-shaped notch, posterior margin on either side of notch transverse. Female abdominal segment 9 ground color ventrally, piceous dorsally and laterally, with castaneous dorsal beak, radiating long golden pile ventrally. Dorsal beak extending beyond castaneous anal styles. Posterior margin of abdominal segment 9 sinuate.
Genitalia
Male pygofer castaneous, ground color ventrally with ground color dorsal beak, piceous laterally with piceous posterior margin, tawny ventral margin and dorsoposterior spot, distal shoulder smoothly curved, recurved mediad, dorsal beak pointed, broadly triangular, curved ventrally when viewed from the side. Upper pygofer lobe absent, pygofer basal lobes broad, angled laterally, adpressed to pygofer, with transverse terminus, radiating short golden pile. Anal styles light castaneous, radiating short golden pile, anal tube ochraceous. Median uncus lobe dark castaneous, short, semicircular, lateral branch of uncus large, swollen, curving and meeting dorsomedially before diverging and flattening forming parallel triangular extensions on either side of aedeagus. Aedeagus large, tubular, light castaneous with ochraceous tip, restrained by ventromedial extension of uncus.
Female gonocoxite IX ground color, gonapophyses IX and X castaneous. Ovipositor sheath reaching beyond dorsal beak. Long golden pile radiating from ovipositor sheath.
Measurements (mm).—N = 1 male or 1 female. Length of body: male 24.20, female 25.05; length of fore wing: male 32.05, female 31.50; width of fore wing: male 12.15, female 11.50; length of head: male 4.40, female 4.40; width of head including eyes: male 10.90, female 10.30; width of pronotum including suprahumeral plates: male 10.75, female 10.50; width of mesonotum: male 9.00, female 9.10.
Diagnosis.—The new species can be distinguished from all but Y. andriana, Y. bouvieri, Y. grandidieri, Y. guttulata, Y. viettei viettei Boulard, 1981, Y. viettei anjouaniensis Boulard, 1990 and Y. viettei moheliensis Boulard, 1990 by the ochraceous coloration of the basal hind wings in Y. mahajangaensis n. sp. Yanga bouvieri can be distinguished by the piceous brown being basal instead of distal in the hind wings. Yanga andriana can be distinguished by the reduced piceous markings on the mesothorax and the lack of piceous brown on the hind wing hind margin and distal anal cell 2. The new species can be distinguished from Y. guttulata by the distal half of the hind wing being piceous brown in the new species but there is a piceous brown spot on the proximal apical cells and distal apical cells are margined in piceous brown in Y. guttulata. The piceous brown of light intensity of the piceous brown that forms a central spot, spots in the distal apical cells and within anal cell 2 distinguishes Y. grandidieri from the new species. The subspecies Y. viettei viettei and Y. viettei moheliensis can be distinguished by the lack of piceous markings along the entire lateral portion of the lateral sigillae, and the hind wing with piceous brown extending along the cubitus posterior vein, within the entirely of anal cell 1 and all but a spot at the base of anal cell 2 and generally reduced piceous thoracic markings. Finally, Y. viettei anjouaniensis can be distinguished by the more orange-brown hind wings with a central brown fascia absent in the new species but characteristic of Y. mayottensis Boulard, 1990.
Distribution.—The species is only known from the type series collected in Tsingy de Bemaraha National Park, Mahajanga province in western Madagascar.
description: Published as part of Sanborn, Allen F., 2021, The cicadas (Hemiptera: Cicadoidea: Cicadidae) of Madagascar including a new tribe, five new genera, twelve new species, four new species synonymies, five revised species status, ten new combinations, new tribal assignments for four genera, one new subtribe synonymy, a checklist and key to the species, pp. 1-79 in Zootaxa 4937 (1) on pages 12-15, DOI: 10.11646/zootaxa.4937.1.1, http://zenodo.org/record/4559438