Pravistylus pelorophallus, Stiller, 2010

Stiller, M., 2010, Revision of the Southern African leafhopper genus Pravistylus (Hemiptera, Cicadellidae, Deltocephalinae) 2468, Zootaxa 2468 (1), pp. 1-81: 41-42

publication ID

http://doi.org/ 10.11646/zootaxa.2468.1.1

persistent identifier

http://treatment.plazi.org/id/03EFD356-FFF3-FFFB-6CFF-742F892BD2F2

treatment provided by

Felipe

scientific name

Pravistylus pelorophallus
status

sp. n.

Pravistylus pelorophallus   sp. n.

( Figs 1 aa; 2 u; 3 ai; 4 ag; 5 aa; 6 af & ag; 7 bp; 8 az & ba)

Diagnosis. Aedeagus, in lateral view, with shaft very long, thin, about 4 times as long as distance between apex of dorsal apodeme and preapical lobe ( Fig. 3 ai). Plate triangular, with apex digitate, 1.1–1.3 times as long as wide ( Fig. 2 u). Style with distal part far from base, with apophysis about two thirds as wide as the width across preapical lobe ( Fig. 5 aa).

Etymology. Greek, huge (peloros) for the oversized aedeagus (phallus), occupying much of the pygofer.

Male and female. Ochraceous, sometimes with paired fuscous markings on vertex and inner anteapical cell. Hind wing about 0.2 times as long as tegmina ( Figs 8 az & ba).

Male. Dimensions. (n = 5) Length: apex of vertex to apex of tegmina 2.9–3.1 mm; apex of vertex to apex of abdomen 2.7–3.0 mm; vertex medially 0.4 mm; vertex next to eye 0.3 mm; pronotum medially 0.3 mm. Width: head 0.9 mm; pronotum 0.8–0.9 mm. Ocellar diameter 23.5–29.7 µm; ocellocular distance 42.0 µm.

Genital capsule. Pygofer, in lateral view, with ventral posterior margin somewhat convex, membranous, posterior margin sclerotized and wedge-shaped membranous region submarginally; dorsal posterior margin lobate ( Fig. 1 aa). Pygofer lobe equidistantly triangular, bluntly rounded; about half as wide as pygofer ( Fig. 1 aa). Plate triangular, apex digitate, slightly deflected laterally; medial margins subparallel, close together ( Fig. 2 u); plate 1.1–1.3 times as long as wide. Aedeagal shaft, in lateral view, arising medially from atrium; preatrium long, narrow; dorsal apodeme narrow; shaft very long, thin, about 4 times as long as length of dorsal apodeme to preatrium; shaft base C-shaped, close to dorsal apodeme, with apical quarter straightened; gonopore apical, oblique, ventral ( Figs 3 ai, 4 ag). Style distal part far from anterior medial arm, apophysis about two thirds as wide as width across preapical lobe, apex of apophysis acutely angled, teeth along posteroventral margin ( Fig. 5 aa). Connective stem slightly narrower than the width across the arms ( Fig. 6 af); in lateral view, curved ( Fig. 6 ag).

Female. Dimensions. (n = 8) Length: apex of vertex to apex of tegmina 3.0– 3.2 mm; apex of vertex to apex of abdomen 3.1–3.6 mm; vertex medially 0.5 mm; vertex next to eye 0.3 mm; pronotum medially 0.3– 0.4 mm. Width: head 0.9–1.0 mm; pronotum 0.8–0.9 mm. Ocellar diameter 19.2–29.8 µm; ocellocular distance 35.3–45.2 µm.

Genitalia. Sternite 7 base rectangular, hind margin ligulate (width at apex 0.5 times ligula length), base triangular, apex rectangular, notch wide, shallow (length of ligula about as long as length of base) ( Fig. 7 bp).

Material examined. Holotype male. South Africa, KwaZulu-Natal. Lower Loteni east, 29°33ʹS, 29°44ʹE, 1492 m, 26.xii.2004, M. Stiller, sweeping grass, regrowth after fire ( SANC) GoogleMaps   . Paratypes. 4♂, 8♀.

KwaZulu-Natal. 4♂, 8♀, same data as holotype ( BMNH, SANC) GoogleMaps   .

Remarks. The unique feature of P. pelorophallus   is the very long, thin, tubular aedeagus ( Fig. 3 ai), that occupies much of the pygofer ( Fig. 1 aa), and to a lesser extent, the shape of the pygofer and pygofer lobe ( Fig.1 aa). A number of species have similar plate shapes, such as P. oxyphysis   ( Figs 2 o & p), P. interdiscus   ( Figs 2 r & s), P. serratus   sp. n. ( Fig. 2 v), P. caenophallus   ( Fig. 2 y) and P. odontopygeus   ( Fig. 2 x). The length to width ratio of the plate of all of these latter species is larger, ranging from 1.4–1.9 times as long as wide. The plate of P. pelorophallus   is 1.1–1.3 times as long as wide. All of these latter species have the apex of the plate curved medially or posteriorly, and never laterally. Also in all of these latter species the style and especially the aedeagus is different. The style in P. pelorophallus   is as in Fig. 5 aa, and in P. oxyphysis   as in Figs 5 y & z, in P. interdiscus   as in Fig. 5 r, in P. serratus   as in Fig. 5 i, in P. caenophallus   as in Fig. 5 ac and in P. odontopygeus   as in Fig. 5 x. The aedeagus in P. pelorophallus   is as in Figs 3 ai & 4 ag, and in P. oxyphysis   as in Figs 3 ac & 4 aa, in P. interdiscus   as in Figs 3 aa & 4 y, in P. serratus   as in Figs 3 ae & 4 ac, in P. caenophallus   as in Figs 3 ak & 4ai and in P. odontopygeus   as in Figs 3 ah & 4 af.

SANC

Agricultural Research Council-Plant Protection Research Institute