Geelus stompdraad, Stiller, 2020

Stiller, Michael, 2020, A new leafhopper genus Geelus and 12 new species (Hemiptera, Cicadellidae Deltocephalinae) from Southern Africa, Zootaxa 4786 (3), pp. 301-344 : 322

Geelus stompdraad sp.n.

( Figs 10A, B , 11 A–I)

Diagnosis. Aedeagal shaft short, compressed, straight, posterior margin with 1–3 single teeth, apex with rim with posteriad paired tooth. Pygofer process smooth, sublinear, orientation posteroventrad. Female sternite 7 with median ligula recessed into sternite, ligula posterior margin sinuous.

Etymology. Afrikaans nouns in apposition, stomp, blunt and draad, wire, for the short, stocky aedeagal shaft. Gender masculine.

Male. Measurements. n=35. Length from apex of crown to apex of tegmina 4.64–5.10 mm. Crown median length 0.39–0.42 mm. Crown length next to eye 0.32–0.35 mm. Pronotum length 0.47–0.52 mm. Head width across eyes 1.38–1.48 mm. Pronotum width 1.31–1.39 mm. Ocellus diameter 40.8–57.6 μm; interocular distance 67.7– 85.9 µm. Apical angle of crown 120.6°±2.5°.

Pygofer lobe. Process orientation posteroventrad, curvate, smooth; origin dorsomedial at base of pygofer lobe; pygofer lobe about as wide at base as width of pygofer, lobe triangular, apex narrowly or broadly rounded; anterior apodeme short, lateral. Apex of pygofer lobe extended slightly beyond apex of subgenital plate, considered equidistant ( Figs 11F, 11H ).

Anal tube. Conical ( Fig. 11F ).

Subgenital plate. Number of macrosetae 3–4; medioposterior angle, round; length: width 1.1–1.2; position of macrosetae, in distal half. Medial margin distally sometimes shallowly excavated. ( Fig. 11E , drawing, right plate)

Valve. Shape obtuse triangular ( Fig. 11E ).

Style. Apophysis with subapical, lateral tooth; apical tooth ventral; apophysis width and width across preapical lobe similar; ratio length to width of apophysis 2.8–3.7 ( Fig. 11D ).

Connective. Stem length relative to arm length, one quarter length of arms; stem width relative to width across arms, half as wide as greatest width across arms ( Fig. 11C ).

Aedeagus. Shaft thick, compressed; rim at apex of shaft with paired subapical posterior teeth; denticulation of shaft, 2–4 single, medial teeth, posteriorly; shaft straight; dorsal apodeme, in lateral view, short, approximately 60° to shaft, preatrium approximately 120° to shaft ( Figs 11A, 11B ).

Female. Measurements. n=12. Length from apex of crown to apex of tegmina 4.50–5.25 mm. Crown median length 0.40–0.44 mm. Crown length next to eye 0.33–0.36 mm. Pronotum length 0.47–0.54 mm. Head width across eyes 1.36–1.55 mm. Pronotum width 1.26–1.47 mm. Ocellus diameter 38.9–56.8 μm; interocular distance 70.0–84.0 µm. Apical angle of crown 120.2°±2.8°.

Sternite 7. Shape of posterior margin with median ligula, within wide notch (as wide as posterior margin); ligula recessed, with sigmoid posterior margin ( Fig. 11I ).

Valvifer 1. Symmetrical or ventral margin produced narrowly ( Fig. 11G ).

Material examined. Holotype male. South Africa, Western Cape Province. CCDL08587, Nuwerus, -31.14, 18.35, 1.i.1971, J.G. Theron ( SANC). Paratypes. 36♂, 13♀. Western Cape Province, 33♂, 13♀, ibid. holotype; 1♂, CCDL 27837, Pearly Beach, -34.66, 19.49, 15.xii.1971, J.G. Theron. Northern Cape Province, 2♂, CCDL 18879, Doringriver waterfall north of Nieuwoudtville, -31.3167, 19.1167, 7.x.2002, M. Stiller, sweeping, Galenia africana , Aizoaceae ( BMNH, INHS, SANC).

Remarks. This species has the aedeagus with a compressed shaft on an enlarged preatrium and small dorsal apodeme, apical paired teeth and medial, single teeth on the posterior margin of the shaft, numbering 2–4. The single teeth on the medial margin of the shaft varied in number, size and position. The sternite 7 of the female resembles the sternite 7 of G. nektanddraad ( Figs 9 H–J), but has the ligula sinuous, with the ligula of G. nektanddraad acute, cup-shaped. Specimen color and shape of crown ( Figs 10A, B ) resembles that of other species.

Figures

FIGURE 9. Geelus nektanddraad gen.n. & sp.n., male and female genitalia, line drawings. A. Aedeagus, dorsally; B. Aedeagus, laterally; C. Style; D. Connective; E. Subgenital plate; F. Genital capsule, laterally; G. Genital capsule, dorsally; H. Sternite 7, Biesiesfontein specimen, on Zygophyllum; I. Sternite 7, Biesiesfontein specimen, on Sarcocaulon; J. Sternite 7, Biesiesfontein specimen, on Pteronia; K. Valvifer 1, laterally.

FIGURE 10. Geelus gen.n. species, adult habitus, males and females. A. Geelus stompdraad sp.n., male; B. Geelus stompdraad sp.n., female; C. Geelus platdraad sp.n., male; D. Geelus platdraad sp.n., female; E. Geelus slangdraad sp.n., male; F. Geelus drietanddraad sp.n., male; G. Geelus drietanddraad sp.n., female.

FIGURE 11. Geelus stompdraad gen.n. & sp.n., male and female genitalia, line drawings. A. Aedeagus, ventrally; B. Aedeagus, laterally; C. Connective; D. Style; E. Subgenital plate; F. Genital capsule, dorsally; G. Valvifer 1, laterally; H. Genital capsule, laterally; I. Sternite 7.