Angolaia Linnavuori & Al-Ne'amy, 1983: 92

Xu, Deliang & Zhang, Yalin, 2022, Taxonomy of the leafhopper genus Angolaia (Hemiptera: Cicadellidae Deltocephalinae: Selenocephalini) with description of a new species from Zambia, Zootaxa 5222 (5), pp. 489-494 : 490

Genus Angolaia Linnavuori & Al-Ne'amy, 1983: 92

Type species: Angolaia atrata Linnavuori & Al-Ne'amy, 1983 , by original designation.

Diagnosis. Crown produced and foliaceous, concave medially; anterior margin of head very thin, upturned, with two transverse ridges and a narrow sulcus; crown, pronotum, scutellum and forewing marked with dense black brown irrorations; male pygofer side lobes with ventroposterior margin extended into long horn-like process, without macrosetae; subgenital plate with lateral margin convex in dorsal view; style with apical process narrow and long, lateral lobe blunt or not prominent; connective U-shaped, arms widely separated, stem short; aedeagal shaft short and robust, simple, in lateral view connective and aedeagus forming right angle.

Description. This genus can be distinguished from other genera by the following characters: body small to medium sized with coloration yellow brown to dark brown; crown, pronotum, scutellum and forewing marked with dense black brown irrorations; face with black mottling; anterior margin with head rounded and produced, concave medially, median length longer than next to eyes, upturned in lateral view, very thin with two transverse ridges and a narrow sulcus; ocelli large, on anterior margin of head, closely adjacent to corresponding eye; face with frontoclypeus apically constricted, clypeal suture obscure; anteclypeus conspicuously expanded apically; gena shagreen; antennae short, antennal pits below mid-height of eyes in facial view, antennal ledge weak; head broader than pronotum; pronotum with lateral margin short; forewing with inner anteapical cell open, cross vein present between claval suture and A1 and between A1 and A2; fore femur with anteromedial (AM1) row setae present, intercalary (IC) row with fine long setae, anteroventral (AV) row with short macrosetae on ventral margin; protibia dorsal surface rounded with 1+5 dorsal setae; metafemur with apical setal formula 2+2+1.

Male genitalia: pygofer basolateral membranous cleft present, side lobes narrow and without macrosetae, ventroposterior margin extended into long horn-like process; subgenital plate with lateral margin convex in dorsal view; style with apical process long, lateral lobe blunt or not prominent; connective U-shaped, arms robust and widely separated, stem short; aedeagal shaft short and robust, tapering apically, socle developed, preatrium with lateral projections articulated with connective stem, dorsoatrium with lamellae, bifurcated; gonopore on ventral surface; anal tube wide basally, strongly constricted in middle, without appendages.

Female genitalia: pygofer with numerous macrosetae, ovipositor distinctly surpassing apex of pygofer; dorsal margin of first valvulae ( Fig. 2 , S) with sculpturing pattern strigate, with subapical irregular sculpturing on ventrolateral surface; second valvulae ( Fig. 2 , T) with a dorsal median blunt tooth, dorsal margin with small serrate teeth restricted to approximately apical one-third.

Distribution. Afrotropical region.

Remarks. This genus resembles the Sapoba group including Foso , Ifeia and Sapoba in having similar external characters: body robust; crown produced and foliaceous; anterior margin of head with two transverse ridges and a narrow sulcus, an additional third ridge either totally absent or present as faint trace on either side of anterior margin of crown or near adjacent eye; forewings with or without dark brown patches at subcostal vein; hind femur with apical setal formula 2+2+1. Angolaia can be distinguished from them by the following characters: anterior margin of head more thin and prolonged compared to Ifeia and Sapoba ; pygofer side lobes with ventroposterior margin extended into long horn-like process, without macrosetae; style with apical process narrow and long, lateral lobe blunt or not prominent; connective U-shaped; aedeagal shaft short and robust, simple, the lateral view of connective and aedeagus forms the right-angle. Foso has the pygofer side with dorsal margins heavily sclerified, lobes sharptipped, and ventroposterior margin without long horn-like process; the subgenital plate band-like, very short and broad, shorter than valve; the style with apical process incrassate; and the aedeagal shaft with a pair of long falcate basal appendages. Ifeia has the subgenital plate relatively short compared to Angolaia ; the style with apical process incrassate and lateral lobe distinct; the connective H or Y-shaped; and the aedeagal shaft long with a or more pair of apical or middle processes. Sapoba has the ventroposterior margin of the pygofer side and upper margin of side lobes with a pair of long falcate or claw-like processes, recurved dorsally or ventrally, with a group of macrosetae; the style with apical process claw-like and lateral lobe distinct, nearly right angled; the connective with the upper arms long and far from each other, linked to the aedeagus base by a membrane, and the ventral arms short and articulated with the style; and the aedeagal shaft very long, filiform, and strongly reversely recurved.

Figures

FIGURE 2. J–R, A. picea sp. nov., male; J–K, Pygofer side, lateral and dorsal view; L–M, Anal tube, lateral and dorsal view; N, Subgenital plate, dorsal view; O, Style, dorsal view; P–R, Aedeagus and connective, lateral, dorsal and ventral view; S–T, A. picea sp. nov., female, apex of first valvulae and second valvulae, lateral view.