Elginus denticulatus, 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: 11-12

publication ID

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

persistent identifier

http://treatment.plazi.org/id/03BD0C4B-FFB3-D171-FF46-F8F0FD3F2B67

treatment provided by

Felipe

scientific name

Elginus denticulatus
status

sp.n.

Elginus denticulatus   sp.n.

( Figs 9 View FIGURES 9–16 , 57 View FIGURES 51–77 , 84 View FIGURES 78–104 , 111 View FIGURES 105–130 , 136 View FIGURES 131–156 , 161 View FIGURES 157–179 , 186 View FIGURES 180–205 , 212 View FIGURES 206–232 , 238 View FIGURES 233–258 , 261 View FIGURES 259–273 )

Diagnosis. Plate apex rounded with dorsal tooth. Aedeagal shaft twisted with its apex curved dorsally.

Etymology. Latin, tooth, for the dorsal tooth on the apical margin of the plate.

Colour. Male. Markings on vertex absent or indistinct. Slight longitudinal stripes dorsally ( Fig. 9 View FIGURES 9–16 ).

Dimensions. Male (n = 7). Lengths: apex of vertex to apex of tegmina 3.3–3.8 mm, apex of vertex to apex of abdomen 3.5 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 0.4–0.5 mm. Ocellus: diameter 26–32 µm; ocellocular distance 39–53 µm.

Abdominal apodemes. Male. Fig. 261 View FIGURES 259–273 .

Genital capsule. Male. Aedeagal shaft long, 2.4 times as long as dorsal apodeme; in lateral view twisted at mid-length; in dorsal view gradually curved left or right; gonopore lateral (right side) ( Figs. 57 View FIGURES 51–77 , 84 View FIGURES 78–104 ). Connective as in Fig. 111 View FIGURES 105–130 . Plate apex rounded, apex with dorsal tooth; setation variable (4–6 macrosetae), sometimes irregular row ( Fig. 136 View FIGURES 131–156 ). Pygofer lobe broadly rounded ( Figs 161 View FIGURES 157–179 , 186 View FIGURES 180–205 ). Style apophysis slightly curved, almost reaching apex of plate, 0.6 times as long as median arm ( Fig. 212 View FIGURES 206–232 ).

Dimensions. Female (n =4). Lengths: apex of vertex to apex of tegmina 3.0– 3.8 mm, apex of vertex to apex of abdomen 3.0 mm; vertex medially 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 0.9–1.1 mm; pronotum 0.8–0.9 mm; scutellum 0.4–0.6 mm. Ocellus: diameter 25–39 µm; ocellocular distance 41–54 µm.

Genital capsule. Female. Sternite VII usually with wide, shallow, rounded V-shaped notch ( Fig. 238 View FIGURES 233–258 ). Third valvula with two longer setae (39.1–41.7 µm long, 6.5–7.2 µm wide at base). Second valvula with fine serration.

Material examined. Holotype male. South Africa, KwaZulu-Natal. Cathedral Peak, 28°59ʹS 29°14ʹE, 8.xi.1999, sweeping moribund grass, M. Stiller ( SANC). Paratypes (9♂, 6♀). KwaZulu-Natal. 1♂, Dundee, 28°10ʹS 30°14ʹE. 18.xii.1978. J.G. Theron; 1♂, Cathedral Peak forestry area, 28°55ʹS 29°14ʹE, 10.xi.1981, I.M. Millar; 1♀, ibid. holotype; 1♀, Royal Natal National Park, 28°40ʹS 28°56ʹE, 13.xi.1999, sweeping moribund grass; 2♂, 1♀, Mike’s Pass, 28°58ʹ 29°14ʹE, 8.xi.1999, sweeping unburned, moribund grassland; 1♂, Cathkin Peak area, 29°00ʹS 29°27ʹE, 10.xi.1997, Themeda triandra   ( Poaceae   ); 1♂, Champagne Castle Hotel vicinity, 29°04ʹS 29°25ʹE, 16–24.xi.2002; 2♂, Orange River Catchment, 28°53ʹ40.22ʺS 29°01ʹ08.25ʺE, 2880 m, 16.iv.2006, sweeping grass & forbs; 1♂, 3♀, Breakfast Stream, Monk’s Cowl Nature Reserve, 29°03ʹS 29°23ʹE, 9.i.2007, M. Stiller, sweeping, short grass and forbs; 1♀, Hlathikulu Neck, Monk’s Cowl Nature Reserve, 29°02ʹS 29°21ʹE, 9.i.2007, sweeping, grass and forbs; all M. Stiller ( BMNH, SANC).

Remarks. The male genitalia are almost identical to that of E. tortuosus   , although their distributions differ distinctly, and the latter lacks the dorsal tooth on the plate. The sternite VII of the female of E. tortuosus   is also distinct. Elginus malotiensis   has a similar distribution, but lacks a tooth on the apical margin of the plate. Its style apophysis, however, projects beyond the plate and has an angulate posterior margin. Elginus oriens   is the only other species with a dorsal tooth on the plate apex, but it has the style apophysis projecting beyond its short, truncate margin, and it has a different aedeagal configuration with a shorter shaft. Elginus denticulatus   appears to be rare, and mainly occurs at high altitude grasslands of the Drakensberg. The record from Dundee suggests a wider distribution, where the latter is bordered by a number of savanna and grassland vegetation units ( Mucina and Rutherford, 2006). Elginus oriens   probably occurs at lower altitudes in KwaZulu-Natal and further south into the Transkei of the Eastern Cape.

SANC

Agricultural Research Council-Plant Protection Research Institute

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Cicadellidae

Genus

Elginus