Geelus drietanddraad, 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 : 328-330

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Geelus drietanddraad


Geelus drietanddraad sp.n.

( Figs 10F, 10G View FIGURE 10 , 14 View FIGURE 14 A–I)

Diagnosis. Aedeagal shaft elongate, subapically with paired tooth and single ventral subapical tooth, base compress, apex rounded. Female sternite 7 with elongate, recessed rectangular ligula, in rounded, wide notch.

Etymology. Afrikaans nouns in apposition, drie, three, tand, tooth, and draad, wire, for the arrangement of the paired and single tooth near the apex of the aedeagal shaft. Gender masculine.

Male. Measurements. n=8. Length from apex of crown to apex of tegmina 4.24–4.56 mm. Crown median length 0.40–0.43 mm. Crown length next to eye 0.33–0.36 mm. Pronotum length 0.45–0.48 mm. Head width across eyes 1.38–1.45 mm. Pronotum width 1.30–1.37 mm. Ocellus diameter 39.1–48.4 μm; interocular distance 63.6– 72.9 µm. Apical angle of crown 118.8°±2.4°.

Pygofer lobe. Process orientation, ventrad; process denticulation, edentate; process origin mediodorsal; process curvature, curved; anterior apodeme short, lateral. Pygofer lobe apex extended beyond apex of subgenital plate ( Figs 14C, 14E View FIGURE 14 ).

Anal tube. Tubular ( Fig. 14C View FIGURE 14 ).

Subgenital plate. Number of macrosetae, 4; medioposterior angle, right-angle; length: width 0.7–0.9; position of macrosetae on subgenital plate, distal half ( Fig. 14F View FIGURE 14 ).

Valve. Shape obtuse triangular, anterior margin concave ( Fig. 14F View FIGURE 14 ).

Style. Apophysis with subapical, ventral tooth; apophysis width relative to width across preapical lobe, about half width across preapical lobe; ratio length to width of apophysis 2.5–2.9 ( Fig. 14D View FIGURE 14 ).

Connective. Stem length relative to arm length, one third length of arms; stem width relative to width across arms, similar width ( Fig. 14G View FIGURE 14 ).

Aedeagus. Shaft thick; apex of shaft narrowly rounded, partially membranous; denticulation of shaft, small paired subapical lateral tooth, single, submedial, ventral tooth; curvature of shaft sublinear; gonopore apicoventrally; dorsal apodeme, in lateral view, elongate, acutely angled to shaft, preatrium short, rounded ( Figs 14A, 14B View FIGURE 14 ).

Female. Measurements. n=4. Length from apex of crown to apex of tegmina 4.47–4.80 mm. Crown median length 0.42–0.45 mm. Crown length next to eye 0.34–0.37 mm. Pronotum length 0.48 mm. Head width across eyes 1.45–1.50 mm. Pronotum width 1.38–1.40 mm. Ocellus diameter 42.0 μm; interocular distance 70.0 µm. Apical angle of crown 118.9°±1.5°.

Sternite 7. Shape of posterior margin, short recessed, transverse, concave ligula ( Fig. 14I View FIGURE 14 ).

Valvifer 1. Symmetrical or ventral margin produced narrowly ( Fig. 14H View FIGURE 14 ).

Material examined. Holotype male. South Africa, Northern Cape Province, CCDL26931 , Kamiesberg Garies , -30.462, 18.132, x.1976, J.G. Theron ( SANC) GoogleMaps . Paratypes. 10♂, 4♀, ibid. holotype ( SANC) GoogleMaps .

Remarks. The three teeth on the aedeagal shaft, i.e. paired subapical lateral and single ventral, submedial tooth, is only mirrored in G. haakdraad , that has similar lateral paired teeth, but a large dorsal, single disk-like structure. Geelus slangdraad and G. drietanddraad have overlapping localities, but are readily distinguished by the aedeagal shaft, i.e. in the former it is sinuous, thin and immaculate; in the latter it is sublinear, thick and with three teeth. The color of this species ( Figs 10F, G View FIGURE 10 , male and female respectively) similar to other species, with amorphous brown markings in some cells of tegmina, and light markings in anterior margin of pronotum.


Agricultural Research Council-Plant Protection Research Institute