Elginus acutus, Stiller, M., 2009

Stiller, M., 2009, Revision of Elginus Theron (Hemiptera: Cicadellidae: Deltocephalinae) with the description of two new genera and comments on the grassland leafhopper fauna in South Africa, Zootaxa 2135 (1), pp. 1-56: 7

publication ID

http://doi.org/ 10.11646/zootaxa.2135.1.1

persistent identifier

http://treatment.plazi.org/id/03BD0C4B-FFBF-D17C-FF46-FD03FD292A19

treatment provided by

Felipe

scientific name

Elginus acutus
status

sp.n.

Elginus acutus   sp.n.

( Figs 51 View FIGURES 51–77 , 78 View FIGURES 78–104 , 105 View FIGURES 105–130 , 131 View FIGURES 131–156 , 157 View FIGURES 157–179 , 180 View FIGURES 180–205 , 206 View FIGURES 206–232 )

Diagnosis. Aedeagus with shaft tapering uniformly to narrow point, dorsal apodeme reduced. Style with apex of apophysis blunt, bearing up to five teeth, without subapical ventral teeth.

Etymology. Latin, sharpened, tapered, for shape of aedeagal shaft.

Dimensions. Male (n = 4). Lengths: apex of vertex to apex of tegmina 2.1–2.5 mm, apex of vertex to apex of abdomen 2.1–3.1 mm; vertex medially 0.4 mm; vertex laterally next to eye 0.3 mm; pronotum medially 0.3 mm. Maximum widths: head 0.8 mm; pronotum 0.7 mm. Ocellus: diameter 13–29 µm; ocellocular distance 39–53 µm.

Genital capsule. Male. Aedeagal shaft long, 2.1 times as long as dorsal apodeme; tubular, C-shaped, tapering towards apex; gonopore subapical, anteriad ( Figs 51 View FIGURES 51–77 , 78 View FIGURES 78–104 ). Connective elongate ( Fig. 105 View FIGURES 105–130 ). Plate elongate, apex rounded, base fused with valve, as long as pygofer ( Fig. 131 View FIGURES 131–156 ). Pygofer lobe apex truncate ( Figs 157 View FIGURES 157–179 , 180 View FIGURES 180–205 ). Style apophysis 0.9 times as long as anterior lateral lobe, straight, apex rounded, 2–3 apical teeth; reaching one-third from apex of plate ( Fig. 206 View FIGURES 206–232 ).

Female. Unknown.

Material examined. Holotype male. South Africa, Gauteng. Tweefontein Farm SW, 25°54ʹ56.6ʺS 27°47ʹ31.8ʺE, 1459 m, 8.iii.2007, M. Stiller, DVac moribund, dry grass ( SANC) GoogleMaps   . Paratypes (3♂). Gauteng   . 2♂, Uiktomst Farm 499JQ, north Krugersdorp , 25°54ʹ36.8ʺS 27°47ʹ16.2ʺE, 1514 m, 22.iv.2002, R. Koko, yellow pan trap GoogleMaps   ; 1♂, ibid. holotype ( SANC) GoogleMaps   .

Remarks. This species is most similar to E. levilobus   , with regard to plate and valve fusion, connective shape and style shape. Differences are the tapering aedeagal shaft, anteriad gonopore and reduced dorsal apodeme. In E. levilobus   the shaft is tubular with only the apex pointed, gonopore caudad and the dorsal apodeme biramous. Elginus acutus   , E. levilobus   and E. saltus   depict similarities in the apophysis of the style, and to a lesser degree in the structure of the aedeagus, suggesting a close relationship. Five sites were sampled at Tweefontein with the DVac, all less than 4 km apart, in an apparently uniform habitat with some grazing by cattle. Only two specimens were found at one of these sites. At two sites three specimens of E. levilobus   were found. These localities all fall within the Carletonville Dolomite Grassland that expands further east and west and is found mainly on Dolomite ( Mucina & Rutherford, 2006). This vegetation unit has been sampled at other locations to the east and west at various times.

SANC

Agricultural Research Council-Plant Protection Research Institute

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Cicadellidae

Genus

Elginus