Ingcainyenzane irhiniensis, Sanborn & Villet, 2020

Sanborn, Allen F. & Villet, Martin H., 2020, A new genus and three new species of South African Cicadettini (Hemiptera Cicadidae: Cicadettinae), Zootaxa 4885 (4), pp. 579-590 : 581-583

Ingcainyenzane irhiniensis n. gen., n. sp. Sanborn and Villet

( Fig. 1 )

Type material. Holotype. “GRAHAMSTOWN / EC RSA / 33º17ʹ44ʺS 26º31ʹ36ʺE / 17 DEC 2002 / M.H. VILLET” ( AMGS) . Paratypes. “ SOUTH AFRICA E. Cape Prov. / Grahamstown / 33º 17.74S 26º 31.60 E / 17 Dec 2002 / P. Phillips, coll.” one male ( AFSC); “GRAHAMSTOWN / EC RSA / 33º17ʹ44ʺS 26º31ʹ36ʺE / 17 DEC 2002 / M.H. VILLET” two males ( AMGS) .

Etymology. The name is a combination of irhini- for the type locality and –ensis (L. suffix denoting place).

Remarks. The type locality, Grahamstown, originally named Irhini by the local Xhosa people, was renamed Makhanda more than a decade after the type series was collected so the type locality should be considered Makhanda, Eastern Cape, South Africa.

Description. Piceous marked with testaceous.

Head. Head slightly wider than mesonotum, piceous with testaceous mark in posterior epicranial suture and between median ocellus and frontoclypeal suture, and lateral margin of supra-antennal plate. Covered with short golden pile on vertex, short silvery pile on posterior vertex, long silvery pile radiating from entire dorsal surface, extremely long posterior to eye almost reaching middle of prothorax. Ocelli rosaceous, eyes dark castaneous. Ventral head piceous, anterior lorum testaceous, anteromedial gena margin along postclypeus and posterior gena along lorum testaceous, covered with thick silvery pile on lorum and gena. Postclypeus piceous with testaceous lateral third and posteroventral margin, testaceous fascia on dorsal surface widened posteriorly before constricting near frontoclypeal suture, elongated testaceous spot on apex. Postclypeus with ten transverse grooves, long silvery pile radiating from postclypeus. Anteclypeus piceous, covered with long silvery pile. Mentum ochraceous proximally striped with castaneous, labium piceous, rostrum radiating long silvery pile, reaching to center of middle trochanters. Antennal segments piceous except ochraceous distal scape and distal half of terminal flagellar segment.

Thorax. Dorsal thorax piceous. Pronotum with testaceous fascia along anterior midline extending to medial terminus of paramedian fissure, short transverse fascia along anterior margin posterior to posterior cranial depression connected to midline fascia by castaneous fascia anterior to and parallel to paramedian fascia, triangular marks anterior to pronotal collar on either side of piceous posterior midline, castaneous mark on posterior lateral fissure, irregular castaneous spots on lateral disk. Pronotal collar testaceous except transverse piceous mark across anterior midline and piceous lateral portion of pronotal collar lateral angle. Pronotum covered with short silvery pile and radiating long silvery pile. Mesonotum piceous, testaceous fascia along parapsidal suture expanding medially posterior to submedian sigilla and extending posteriorly to terminus of anterior arm of cruciform elevation where it recurves medially producing an inverted heart shape on central disk anterior to cruciform elevation, anterior half of lateral mesonotum testaceous, posterior wing groove light testaceous, cruciform elevation with lateral X and lateral and posterior arms testaceous, piceous between anterior arms, all but distal anterior arms piceous, castaneous fascia along midline expanding posteriorly. Metanotum dark castaneous on midline with ochraceous posterior margin, with anterolateral piceous spot. Dorsum radiating long silvery pile, denser laterally, posteriorly, between anterior arms of cruciform elevation, in wing groove, and on posterior metanotum. Ventral thoracic segments ochraceous marked with castaneous marks on basisternum 2, trochantin 2, medial anepisternum 2, katepisternum 2, medial katepimeron 2, medial meron 2, lateral epimeral lobe, basisternum 3, medial half of episternum 3, and medial trochantin 3, covered with long, dense white and silvery pile.

Wings. Fore wings and hind wings hyaline with eight and five apical cells respectively. Venation ochraceous at base becoming testaceous distally, piceous on proximal radius & subcostal vein along basal cell, arculus, spot on proximal anal vein 2 + 3, spot on node and leading edge of subcostal vein distal to node, leading edge of subcostal vein past node with radiating bristles. Pterostigma absent. Basal membrane of fore wing white with gray posterior margin. Hind wing venation ochraceous, darkening distally, except castaneous proximal anal vein 3. Anal cell 3 and anal cell 2 along anal vein 3 gray, anal cell 3 gray along medial margin. Small V-shaped infuscation on plaga between gray regions.

Legs. Legs greenish testaceous, coxae, trochanters, femora, and tibiae striped with piceous and castaneous, Fore femora with four oblique spines, primary spine longest, secondary intermediate in length, tertiary spine smallest with very small apical spine extending from distal base of tertiary spine, all piceous, angle between spine and femur decreasing in distal spines. Fore tarsi castaneous, middle and hind tarsi lighter in the middle, tibial spurs and comb ground color with darker tips. Pretarsal claws castaneous with lighter middle region. Legs radiating long silvery pile.

Operculum. Male operculum with smoothly curved lateral and posterior margins, domed near base, lateral side bent dorsally at approximate right angle, reaching to middle of sternite II, ochraceous with piceous lateral margin, long silvery pile radiating from operculum, denser at base. Medial margins reaching to lateral hind trochanter, separated by ventral extension of sternite I, curved with straight anterior margins forming an acute angle. Meracanthus triangular with curved apex, ochraceous with piceous base, extending over anterior margin of operculum.

Abdomen. Abdominal tergites 1 and 2 piceous, tergites 3–8 piceous with castaneous mark on posterior dorsolateral and lateral areas and ochraceous posterior margins, amount of castaneous area in tergites 5–7 greater than in tergites 3–4, tergite 8 with greatest amount of castaneous and additional piceous spot next to lateral margin, tergites covered with long and short silvery pile. Timbal cover absent, slight arching in middle opening to timbal cavity of tergite 2, timbal completely exposed, timbal with six ribs, not extending below wing base. Male sternites partly translucent, sternites and epipleurites ochraceous except piceous sternite I, medial and lateral sternite II. transverse fascia on anterior midline of sternite III, sternites III–VII testaceous anteriorly and ochraceous posteriorly with castaneous lateral suture, castaneous spot on anteromedial epipleurites, castaneous surrounded by reddish in some epipleurites, sternite VII an elongated triangle with semicircular apex, sternite VIII elongated, testaceous radiating castaneous pile, denser posteriorly, U-shaped when viewed from posterior. Sternites and epipleurites with short silvery pile, sternite I with dense, long silvery pile along midline.

Genitalia. Male pygofer piceous dorsally with testaceous lateral surfaces, distal shoulder undeveloped, dorsal beak absent, pygofer rounded on dorsal terminus. Upper pygofer lobe lobate, wider at base, with long silvery pile radiating, denser at posterior base, connection to dorsal pygofer straight, pygofer basal lobes elongated, flattened, adpressed to pygofer, with rectangular apex. Anal styles dark castaneous, anal tube ochraceous dorsally, dark castaneous ventrally. Median uncus lobe dark castaneous, very short, flattened, roughly semicircular when viewed from above. Claspers well developed, castaneous, base with parallel sides meeting along midline under median uncus lobe, bent at obtuse angle at distal uncus, tapering and diverging to separate points, recurving towards base at apex. Aedeagus tubular, castaneous, restrained by claspers.

Female currently unknown.

Measurements (mm). N = 1 male. Length of body: 13.4; length of fore wing: 12.8; width of fore wing: 5.5; length of head: 2.6; width of head including eyes: 4.4; width of pronotum including suprahumeral plates: 4.6; width of mesonotum: 4.2.

Diagnosis. This new species can be distinguished from I. nolukhanyoensis n. gen., n. sp. by the medial operculum margin being roughly square and the lack of a triangular mark on midline of the pronotum near the anterior margin in that species. Ingcainyenzane umgeniensis n. gen., n. sp. can be distinguished by the timbal extending below the wing base, male sternite VIII is longer than the pygofer, and the short pygofer upper lobe of this new species.

Distribution. The new species was collected in the Grahamstown grassland thicket (AT38) ( Dayaram et al. 2019) in Makhanda (Grahamstown).

Notes on the biology of the species. We collected the species in the Grahamstown grassland thicket (AT38) ( Dayaram et al. 2019) with males calling from various grasses. We also collected Xosopsaltria thunbergi Metcalf, 1955 and Stagira simplex ( Germar, 1834) in the same habitat.

Figures

FIGURE 1. Ingcainyenzane irhiniensis n. sp.: A, paratype male habitus; B, paratype male dorsum; C, paratype male timbal; D, paratype male operculum; E, paratype male lateral view of genitalia; F, paratype male posterior view of genitalia; G, paratype male fore femur. Scale bar: A, 1 cm; B, 2 mm; C–G, 1 mm.