Elginus extrinsecus, 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: 14

publication ID

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

persistent identifier

http://treatment.plazi.org/id/03BD0C4B-FFB4-D174-FF46-FD81FDAD2C63

treatment provided by

Felipe

scientific name

Elginus extrinsecus
status

sp.n.

Elginus extrinsecus   sp.n.

( Figs 17–20 View FIGURES 17–24 , 60 View FIGURES 51–77 , 87 View FIGURES 78–104 , 114 View FIGURES 105–130 , 139 View FIGURES 131–156 , 164 View FIGURES 157–179 , 189 View FIGURES 180–205 , 215 View FIGURES 206–232 , 242 View FIGURES 233–258 )

Diagnosis. Aedeagal shaft with apex produced into relatively long apical spine-like process, dorsal gonopore at mid-length. Plates with rounded, laterally diverging median margins.

Etymology. Latin, meaning ‘on the outside’, referring to its marginal location in the Savanna Biome.

Colour. Male & female. Pale ochraceous ground colour, dark spots on vertex, pronotum with paired longitudinal fuscous stripes, tegmina with cells fuscous, except costa ( Figs 17, 18 View FIGURES 17–24 ). Colouration of nymph as in Fig. 19 View FIGURES 17–24 . Ventral view of sternite VII of female as in Fig. 20 View FIGURES 17–24 .

Dimensions. Male (n = 5). Lengths: apex of vertex to apex of tegmina 3.7–4.0 mm, apex of vertex to apex of abdomen 2.6–3.4 mm; vertex medially 0.4–0.5 mm; vertex laterally next to eye 0.3 mm; pronotum medially 0.4 mm; scutellum medially 0.3 mm. Maximum widths: head 1.0 mm; pronotum 0.8 mm; scutellum 0.4–0.5 mm. Ocellus: diameter 28 µm; ocellocular distance 46–66 µm.

Genital capsule. Male. Aedeagal shaft with narrow, rounded apical process, about of equal length to basal part of shaft; shaft basally about three times thicker than apical process; shaft long, 2.1 times as long as dorsal apodeme; gonopore at mid-length, dorsal ( Figs 60 View FIGURES 51–77 , 87 View FIGURES 78–104 ). Connective as in Fig. 114 View FIGURES 105–130 . Plate short, apex narrowly rounded; median margins uniformly curved laterad ( Fig. 139 View FIGURES 131–156 ). Pygofer lobe apex angulate, apex bluntly pointed ( Figs 164 View FIGURES 157–179 , 189 View FIGURES 180–205 ). Style apophysis short, wide base with preapical lobe rounded; extending twothirds into plate; ventral teeth apical; apophysis 0.4 times as long as median arm ( Fig. 215 View FIGURES 206–232 ).

Dimensions. Female (n = 7). Lengths: apex of vertex to apex of tegmina 3.8–4.0 mm, apex of vertex to apex of abdomen 3.1–3.7 mm; vertex medially 0.4–0.5 mm; vertex laterally next to eye 0.3–0.4 mm; pronotum medially 0.4 mm; scutellum medially 0.3–0.4 mm. Maximum widths: head 1.0– 1.1 mm; pronotum 0.8–0.9 mm; scutellum 0.4–0.6 mm. Ocellus: diameter 28 µm; ocellocular distance 53–67 µm.

Genital capsule. Female. Sternite VII apical margin with narrow V-shaped notch, flanked by rounded lobes ( Figs 20 View FIGURES 17–24 , 242 View FIGURES 233–258 ). Third valvula with two, narrow macrosetae. Second valvula smooth.

Material examined. Holotype male. South Africa, Northern Cape. 5 km north-east of Hoopstad, 27°47ʹS 25°58ʹE, 1279 m, 9.iii.2005, M. Stiller, DVac grass, Themeda triandra   ( Poaceae   ) common ( SANC). Paratypes (5♂, 12♀). Limpopo. 1♀, Langjan Nature Reserve, 22°52ʹS 29°14ʹE, 12.iii.1990. Northern Cape. 2♂, 4♀, ibid. holotype; 1♂, 3♀, 5 km W of Hotazel on Route R31, 27°13ʹS 22°54ʹE, 1047 m, 7.iii.2005, DVac dry grass, in isolated clumps; 1♂, 3♀, road between Kuruman and Reivilo, 27°35ʹS 23°50ʹE, 1502 m, 8.iii.2005, DVac grazed grass & forbs. North West. 1♂, 1♀, Bloemhof Dam Nature Reserve, 27°34ʹ37ʺS 25°52ʹ18ʺE 1235m 18.xii.2008, sweeping Elionurus muticus   ( Poaceae   ) dominated grassland; all M. Stiller ( BMNH, SANC).

Remarks. The pygofer lobes of the male of this species resemble those of E. theroni   and E. furcillatus   . The medial divergence of the plates resembles that of E. vulgaris   . The aedeagus also resembles that of E. vulgaris   , but the latter has a shorter apical process and has a ventral gonopore. Elginus extrinsecus   has the longest wings of all species, and this might be attributed to a habitat that is probably more temporal than that of many of the other species. The characteristic shape the sternite VII of the females makes it possible to identify the female from Langjan. This locality is very far to the north east of the localities where it was slightly more abundant. All of the records fall within four vegetation units of the Savanna Biome, except Bloemhof that is in the Grassland Biome.

SANC

Agricultural Research Council-Plant Protection Research Institute

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Cicadellidae

Genus

Elginus