Ingcainyenzane, 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 : 580-581

Genus Ingcainyenzane n. gen. Sanborn and Villet

Type species. Ingcainyenzane irhiniensis n. gen., n. sp. (Makhanda (Grahamstown), 33º 17.74’S 26º 31.60’E, Eastern Cape, South Africa) .

Species included. The genus is represented currently only by three species, Ingcainyenzane nolukhanyoensis n. gen., n. sp., Ingcainyenzane irhiniensis n. gen., n. sp. and Ingcainyenzane umgeniensis n. gen., n. sp.

Etymology. The name is a combination of ingca- (Xhosa, ingca, grass) and -inyenzane (Xhosa, inyenzane, cicada) in reference to the species of the genus living in grasses in the local language. The genus is feminine.

Description. Small sized cicada (about 10.1–13.8 mm body length). Head slightly wider than mesonotum, eyes wider than anterior pronotal collar but not as wide as pronotal collar lateral angle, vertex at area of ocelli not as long as frons, supra-antennal plate meets postclypeus at right angle, postclypeus wider than supra-antennal plate, postclypeus inflated, semicircular extension beyond supra-antennal plates when viewed from dorsal side, without central sulcus, rostrum reaching trochanters of middle legs. Pronotum shorter than mesonotum, trapezoidal with anterior margin narrower than lateral margins of pronotal collar, lateral angles of pronotal collar expanded, lateral part of pronotal collar bent ventrally, mesonotum not covering dorsal metanotum, metanotum extends laterally beyond wing groove, cruciform elevation smoothly arched posteriorly. Fore wings and hind wing hyaline, basal cell longer than broad, fore wings and hind wing with eight and five apical cells respectively, fore wing distal apical cell 2 reaching abdomen apex when fore wing at rest, fore wing apical shorter than ulnar cells except apical cells 3, 4 and 6, fore wings about 2.3X longer than broad. Fore wing cubitus anterior straight at base beginning to curve at about two-thirds length, length of the fused median and cubitus anterior veins extending from arculus greater than length of basal cell, radius anterior and radius posterior arise from opposite ends of the node, radial crossvein short forming oblique angles in radius anterior 2 and radius posterior, radiomedial crossvein very slightly curved. Fore femora with three prominent, obliquely angled spines, primary spine longest, secondary spine intermediate in length, and tertiary spine shortest with a small apical spine extending from or distal to base of tertiary spine, angle between spine and femur decreasing in distal spines, tarsi three-segmented. Male operculum with smoothly curved lateral and posterior margins, domed near base, lateral margin reflexed towards base of timbal, extending to middle of sternite II, medial margins separated, meracanthus triangular with curved apex, extending over anterior margin of operculum. Abdomen longer than distance between apex of head and posterior of cruciform elevation, lateral margins straight, expanding laterally to tergite 3 where abdomen begins narrowing posteriorly to genitalia, male sternites partly translucent, epipleurites folded toward dorsal surface producing a channel on lateral margins of the male abdomen, deeper in the posterior abdomen. Timbal cover absent, timbal completely exposed, slight arching in middle opening to timbal cavity of tergite 2, timbal extending to or below wing base, tympana concealed by opercula. Male sternite VIII U-shaped when viewed from posterior. Pygofer distal shoulder not developed, dorsal beak absent, pygofer upper lobe lobate, pygofer basal lobe elongated, flattened, adpressed to pygofer, uncus lobe short, semicircular when viewed from above, claspers well developed, broad at base, meeting along midline, diverging anterolaterad, curving and narrowing to recurving distal terminus, male aedeagus a simple tubular structure with pseudoparameres restrained by claspers.

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

Diagnosis. Ingcainyenzane n. gen. can be distinguished from all other known African Cicadettini except Stellenboschia by the combination of eight apical cells in the fore wings and five apical cells in the hind wings. Species of Buyisa have seven and five apical cells in the fore and hind wings. Species of Afromelampsalta and Pinheya have eight and six apical cells in the fore and hind wings with one species of Afromelampsalta having four hind wing apical cells. The single species of Stellenboschia can be distinguished by the short, broad (twice as long as broad), and rounded fore wings with a strongly curved, bow-like costal margin beginning at the base of the fore wing while the fore wings are about 2.3X longer than broad, with a straight costal margin and more typical fore wing shape in the new genus. Molecular data suggest it is closely related to Buyisa ( Marshall et al. 2015a) .

Distribution. Species of the genus have been collected in Eastern Cape and KwaZulu-Natal, South Africa.