A new leafhopper genus Geelus and 12 new species (Hemiptera, Cicadellidae Deltocephalinae) from Southern Africa Author Stiller, Michael text Zootaxa 2020 2020-06-03 4786 3 301 344 journal article 10.11646/zootaxa.4786.3.1 1175-5326 3876635 94F4B2D8-3941-493A-B9AA-80553E22759C Geelus slangdraad sp.n. ( Figs 10E , 17 A–I) Diagnosis . Aedeagal shaft tubular, in lateral view sinuous, base right-angled to elongate dorsal apodeme. Pygofer lobe narrow, apex rounded, dorsomedial process curved posteroventrad. Female sternite 7 with rectangular, elongate, protruding ligula recessed shallowly in narrow notch. Etymology . Afrikaans nouns in apposition, slang, snake, serpentine and draad, wire, for the sinuous shape of the aedeagal shaft. Gender masculine. Male . Abdominal apodemes . Posterior view as in Fig. 17G . Measurements . n=8. Length from apex of crown to apex of tegmina 4.60–4.95 mm . Crown median length 0.41–0.45 mm . Crown length next to eye 0.33–0.36 mm . Pronotum length 0.46–0.49 mm . Head width across eyes 1.34–1.43 mm . Pronotum width 1.29–1.36 mm . Ocellus diameter 42.0 μm; interocular distance 64.0–73.0 µm. Api- cal angle of crown 116.7°±1.5°. Pygofer lobe . Process orientation, posteroventrad; process edentate; process origin, dorsomedial; process curved; pygofer lobe widely merged with pygofer, lobe triangular, apex broadly rounded; anterior apodeme short, dorsal. Pygofer lobe apex extended well beyond apex of subgenital plate ( Figs 17F, 17H ). Anal tube . Conical ( Fig. 17F ). Subgenital plate . Number of macrosetae, 4–6; medioposterior angle obtuse; length: width, 0.5–0.7; position of macrosetae, distal half ( Fig. 17E ). Valve . Shape obtuse triangular ( Fig. 17E ). Style . Apophysis with subapical, ventral tooth, close to apical ventral tooth, giving apex bilobate appearance; apophysis as wide as width across preapical lobe; ratio length to width of apophysis 1.6–2.0 ( Fig. 17D ). Connective . Stem length relative to arm length, one third length of arms; stem width relative to width across arms, of similar width ( Fig. 17C ). Aedeagus . Shaft thin, tubular; apex of shaft square, shaft edentate; shaft sinuous in lateral view; dorsal apodeme, in lateral view, elongate, rectangular, right angled to base of shaft, preatrium short ( Figs 17A, 17B ). Female . Measurements . n=3. Length from apex of crown to apex of tegmina 4.92–5.15 mm . Crown median length 0.45–0.47 mm . Crown length next to eye 0.37–0.39 mm . Pronotum length 0.49–0.51 mm . Head width across eyes 1.46–1.50 mm . Pronotum width 1.41–1.44 mm . Ocellus diameter 30.7–43.9 μm; interocular distance 72.7–85.9 µm . Apical angle of crown 116.6°±1.4°. Sternite 7 . Shape of posterior margin triangular, elongate, rectangular ligula apically; ligula with narrow, shallow notch posteromedially; ligula recessed about half its length into apex of sternite, distal half protruding ( Fig. 17I ). Valvifer 1 . In lateral view, ventral margin produced narrowly; dorsally, merged broadly (similar to that of G. kinkeldraad , Fig. 6K ). Material examined . Holotype male. South Africa , Northern Cape Province , CCDL08592 , Garies, -30.56, 17.98, 8.ix.2016 , J.G. Theron ( SANC ) . Paratypes . 6♂ , 3♀ . Northern Cape Province , 4♂ , 3♀ , ibid. holotype ; 2♂ , CCDL08593 , Klipvlei , -30.50, 17.83, xi.1931 , South African Museum expedition ( SANC ) . Remarks . All available specimens were dissected. The aedeagus of this species is thin, with the elongate dorsal apodeme, as in G. dundraad , G. platdraad , G. vurkdraad and G. driehoekdraad , but the shaft is sinuous. Unique in this species is the short apophysis of the style, with two ventral teeth, giving the apophysis a bilobate appearance. The subgenital plate is short as in G. haakdraad , and shorter than in other species of Geelus , but with a single row of macrosetae, whereas G. haakdraad has many rows. Female sternite 7 is unique with the protruding, modified ligula, unlike that of other species of Geelus with a ligula that is recessed into a wide notch. Habitus in Fig. 10E is similar to other species of Geelus .