Elginus theroni, 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: 25-26

publication ID

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

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scientific name

Elginus theroni


Elginus theroni   sp.n.

( Figs 35, 36 View FIGURES 33–40 , 73 View FIGURES 51–77 , 100 View FIGURES 78–104 , 126 View FIGURES 105–130 , 152 View FIGURES 131–156 , 175 View FIGURES 157–179 , 201 View FIGURES 180–205 , 228 View FIGURES 206–232 , 254 View FIGURES 233–258 , 270 View FIGURES 259–273 )

Diagnosis. Aedeagal shaft short with long, lateral gonopore, triangular dorsal apodeme. Style apophysis short. Plate with basal and medial margins fused, anterior margins fused to valve.

Etymology. Named for the collector.

Colour. Male & female. As in Figs 35, 36 View FIGURES 33–40 .

Dimensions. Male (n = 40). Lengths: apex of vertex to apex of tegmina 2.5–2.8 mm, apex of vertex to apex of abdomen 2.5–2.8 mm; vertex medially 0.4 mm; vertex laterally next to eye 0.3 mm; pronotum medially 0.3 mm; scutellum medially 0.2–0.3 mm. Maximum widths: head 0.8–0.9 mm; pronotum 0.7–0.8 mm; scutellum 0.3–0.4 mm. Ocellus: diameter 23–31 µm; ocellocular distance 40–52 µm.

Abdominal apodemes. Male. Fig. 270 View FIGURES 259–273 .

Genital capsule. Male. Aedeagal shaft tubular; short, 1.3 times as long as dorsal apodeme; in lateral view curved dorsally; gonopore lateral, extending from apex to one-third length of shaft; dorsal apodeme triangular ( Figs 73 View FIGURES 51–77 , 100 View FIGURES 78–104 ). Connective with stem about as long as arms ( Fig. 126 View FIGURES 105–130 ). Plate apex pointed; margins fused basally, fused to valve; apex separated by about 15°; setation basal, uniseriate, variable (1–4) ( Fig. 152 View FIGURES 131–156 ). Pygofer lobe narrowly rounded ( Figs 175 View FIGURES 157–179 , 201 View FIGURES 180–205 ). Style apophysis curved, acute; near base of plate; apophysis 0.5 times as long as median arm ( Fig. 228 View FIGURES 206–232 ).

Dimensions. Female (n = 16). Lengths: apex of vertex to apex of tegmina 2.6–3.0 mm, apex of vertex to apex of abdomen 2.8–3.1 mm; vertex medially 0.4 mm; vertex laterally next to eye 0.3 mm; pronotum medially 0.3 mm; scutellum medially 0.3 mm. Maximum widths: head 0.9–1.0 mm; pronotum 0.7–0.8 mm; scutellum 0.4–0.5 mm. Ocellus: diameter 21–31 µm; ocellocular distance 42–56 µm.

Genital capsule. Female. Sternite VII with median rounded, bell-shaped or somewhat truncated process ( Fig. 254 View FIGURES 233–258 ). Third valvula with 3–4 macrosetae, 24.5–29.4 µm long. Second valvula with fine denticulation.

Material examined. Holotype male. South Africa, Western Cape. Theewaterskloof Dam, 33°59ʹS 19°11ʹE, 327 m, 16.xii.2004, M. Stiller, DVac Merxmuellera stricta   ( Poaceae   ), wetland at edge of dam, mountain fynbos ( SANC). Paratypes (27♂, 13♀). Gauteng. 1♂, Ezemvelo, 25°42ʹS 28°55ʹE 1402 m, 14.xii.2005, M. Stiller, sweeping Xerophyta retinervis   ( Velloziaceae   ) regrowth after fire. Western Cape. 1♂, Slagboom, 33°14ʹS 19°17ʹE, 13.xii.1931; 1♂, 2♀, Ceres, 33°22ʹS 19°18ʹE, 25.xi.1971, 6.i.1973; 1♂, Grabouw, 34°09ʹS 19°00ʹE, 6.i.1971; 1♂, Paarl, 33°46ʹS 18°58ʹE, 13.viii.1971; 1♂, Rawsonville, 33°41ʹS 19°19ʹE, 16.i.1971; 2♂, Koelenhof, 33°53ʹS 18°48ʹE, 15.xi.1974; 1♂, Klipheuwel, 33°34ʹS 18°42ʹE, 100 m, 24.xi.1974; 2♂, Jonkershoek Nature Reserve, 33°58ʹS 18°55ʹE, 5.xii.1977; 1♂, Robinson’s Pass, 33°53ʹS 22°01ʹE, 700m; 2♂, Gydo Pass, 33°08ʹS 19°20ʹE, 2.ii.1981; all J.G. Theron; 6♂, 7♀, Slagboom Farm Agter Witsenberg, 33°14ʹS 19°16ʹE, 882 m, 13.xii.2004, DVac wetland grass and sedges ( Merxmuellera stricta   ( Poaceae   ) common); 3♂, Wemmershoek Dam north Franschhoek, 33°51ʹS 19°30ʹE, 201 m, 14.xii.2004, DVac Themeda triandra   ( Poaceae   ) common in cleared pine plantation, burned 2003; 7♂, 7♀, ibid. holotype; 1♀, Hawekwa Mountain Du Toit’s Kloof Pass, 33°41ʹ48ʺS 19°06ʹ36ʺE, 1500m, 28.xii.2005; all M. Stiller ( AMNH, BMNH, SANC).

Remarks. The single male from Gauteng, Ezemvelo, is probably not an incorrect record, but suggests under collecting, but also that the distribution could extend beyond the Fynbos Biome. A similar situation exists in a new species of Pravistylus   where the species is common in the Fynbos biome, but is known from scattered records in the Eastern Cape and one long series from the Drakensberg in KwaZulu-Natal. Related species with a relatively short shaft that occur in the fynbos are E. bispinus   , E. furcillatus   and E. saltus   . A number of species with a similar ratio for shaft and dorsal apodeme lengths are also found in the Grassland Biome. Elginus bispinus   and E. saltus   have long style apophyses, with that of E. furcillatus   almost as short as that of E. theroni   . The aedeagal shaft of E. furcillatus   and E. bispinus   , however, has the apex modified by the presence of spines. Superficially this species is most easily confused with Vilargus pumilicans Theron   and some new species of Pravistylus   , but can be recognized by internal and external male and female genitalia.


Agricultural Research Council-Plant Protection Research Institute


American Museum of Natural History