Geelus drietanddraad Stiller 2020, sp.n.
Creators: name: Stiller, Michael
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadellidae
Geelus
Geelus drietanddraad

description: Geelus drietanddraad sp.n.   
(Figs 10F, 10G, 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).   
 Anal tube. Tubular (Fig. 14C).   
 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).   
 Valve. Shape obtuse triangular, anterior margin concave (Fig. 14F).   
 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).   
 Connective. Stem length relative to arm length, one third length of arms; stem width relative to width across arms, similar width (Fig. 14G).   
 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).   
 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).   
 Valvifer 1. Symmetrical or ventral margin produced narrowly (Fig. 14H).   
 Material examined. Holotype male. South Africa, Northern Cape Province, CCDL26931, Kamiesberg Garies, -30.462, 18.132, x.1976, J.G. Theron (SANC). Paratypes. 10♂, 4♀, ibid. holotype (SANC).   
 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, 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.
description: Published as part of Stiller, Michael, 2020, A new leafhopper genus Geelus and 12 new species (Hemiptera, Cicadellidae Deltocephalinae) from Southern Africa, pp. 301-344 in Zootaxa 4786 (3) on pages 328-330, DOI: 10.11646/zootaxa.4786.3.1, http://zenodo.org/record/3876635