Elginus semialatus, 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: 24-25

publication ID

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

persistent identifier

http://treatment.plazi.org/id/03BD0C4B-FFAE-D162-FF46-FA5CFC49296E

treatment provided by

Felipe

scientific name

Elginus semialatus
status

sp.n.

Elginus semialatus   sp.n.

( Figs 31–34 View FIGURES 25–32 View FIGURES 33–40 , 71, 72 View FIGURES 51–77 , 98, 99 View FIGURES 78–104 , 124, 125 View FIGURES 105–130 , 150, 151 View FIGURES 131–156 , 174 View FIGURES 157–179 , 199, 200 View FIGURES 180–205 , 226, 227 View FIGURES 206–232 , 253 View FIGURES 233–258 )

Diagnosis. Aedeagal shaft with apex curved laterally; subapical, paired or single, lateral wing-like process.

Etymology. Latin, for subapical wing-like process (alata) on aedeagal shaft, which is either only on one side (semi), or partially paired.

Colour. Male & nymph. As in Figs 31–33 View FIGURES 25–32 View FIGURES 33–40 .

Dimensions. Male (n = 23). Lengths: apex of vertex to apex of tegmina 2.6–2.8 mm, apex of vertex to apex of abdomen 2.3–2.5 mm; vertex medially 0.3–0.4 mm; vertex laterally next to eye 0.2–0.3 mm; pronotum medially 0.3 mm; scutellum medially 0.2–0.3 mm. Maximum widths: head 0.8–0.9 mm; pronotum 0.7 mm; scutellum 0.3–0.5 mm. Ocellus: diameter 24–32 µm; ocellocular distance 37–44 µm.

Genital capsule. Male. Aedeagal shaft straight, tubular; apex blunt, enlarged laterad; subapically with variable process: paired or single lateral triangular process; shaft short, 1.4 times as long as dorsal apodeme; gonopore dorsal, subapical ( Figs 71, 72 View FIGURES 51–77 , 98, 99 View FIGURES 78–104 ). Connective as in Figs 124, 125 View FIGURES 105–130 . Plate apex rounded; medial margins straight, contiguous or divergent ( Fig. 150, 151 View FIGURES 131–156 ). Pygofer broadly rounded, symmetrical ( Figs 174 View FIGURES 157–179 , 199, 200 View FIGURES 180–205 ). Style apophysis with wide base and apex, narrow projection at apex; extending one-third from apex of plate; apophysis 0.6 times as long as median arm ( Figs 226, 227 View FIGURES 206–232 ).

Dimensions. Female (n = 21). Lengths: apex of vertex to apex of tegmina 3.0– 3.2 mm, apex of vertex to apex of abdomen 3.1–3.4 mm; vertex medially 0.5 mm; vertex laterally next to eye 0.3 mm; pronotum medially 0.3–0.4 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 48–61 µm.

Genital capsule. Female. Sternite VII with shallow median indentation, flanked by irregular sclerotized areas ( Fig. 253 View FIGURES 233–258 ), in situ as in Fig. 34 View FIGURES 33–40 .

Material examined. Holotype male. South Africa, Eastern Cape. Rhodes, 30°51ʹ42.48ʺS 27°54ʹ35.4ʺE, 1965 m, 27.iv.2006, DVac roadside short grass, grazed Eragrostis sp.   ( Poaceae   ), dominant, M. Stiller ( SANC). Paratypes (35♂, 38♀). Eastern Cape. 1♂, Balloch Peak, 30°40ʹ16ʺS 27°42ʹ8ʺE, 2100 m, 28.iii.2005, sweeping Festuca sp.   ( Poaceae   ), no flower; 2♂, 6♀, 6 nymphs, Wildfell Farm, 30°40ʹ6ʺS 27°48ʹ30ʺE, 2180 m, 29.iii.2005, sweeping grazed grass; 2♀, Tele Falls catchment, 30°39ʹ19ʺS 27°50ʹ9ʺE, 2440 m, 29.iii.2005, sweeping two species of Merxmuellera sp.   ( Poaceae   ) in river course; 6♂, Halseton Krans, 30°42ʹ39ʺS 27°47ʹ39ʺE, 2200 m, 1.iv.2005, sweeping short grass; 26♂, 36♀, ibid. holotype; all M. Stiller ( BMNH, SANC).

Remarks. Two forms of the aedeagus are recognized: frequently shaft subapically with triangular process on one side, occasionally with a more deformed process on the opposite side ( Figs 71, 72 View FIGURES 51–77 ). The former variety has   the single process always on the same side and with the apical process always curved in the opposite direction. The males of no other species have lateral subapical processes. Females are more difficult to distinguish as the sternites of E. minutulus   ( Fig. 248 View FIGURES 233–258 ) and E. furcillatus   ( Fig. 244 View FIGURES 233–258 ) are similar, with locality possibly providing some guideline for their separation. For instance E. furcillatus   probably occurs in the Fynbos Biome, and E. minutulus   at lower altitudes near the Drakensberg. Elginus semialatus   occurs at high altitude on the western end of the Drakensberg and the Witteberg.

SANC

Agricultural Research Council-Plant Protection Research Institute

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Cicadellidae

Genus

Elginus