Pravistylus odontopygeus, Stiller, 2010

Stiller, M., 2010, Revision of the Southern African leafhopper genus Pravistylus (Hemiptera, Cicadellidae, Deltocephalinae) 2468, Zootaxa 2468 (1), pp. 1-81: 37-38

publication ID

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

persistent identifier

http://treatment.plazi.org/id/03EFD356-FFFF-FFF7-6CFF-71708E66D609

treatment provided by

Felipe

scientific name

Pravistylus odontopygeus
status

sp. n.

Pravistylus odontopygeus   sp. n.

( Figs 1 y; 2 x; 3 ah; 4 af; 5 x; 6 ad; 7 bl; 8 at)

Diagnosis. Plate apex rectangular, apex uniformly merged into lateral margin, both plate apices usually of equal length ( Fig. 2 x). Pygofer lobe ventrobasally with short, sclerotized tooth, arising from medial surface ( Fig. 1 y). Aedeagus, in lateral view, with shaft narrow, uniformly C-shaped ( Fig. 3 ah). Female sternite 7 as in Fig. 7 bl.

Etymology. Greek, for the short tooth (odontos) on the pygofer (pyge) lobe.

Male and female. Ochraceous, sometimes with paired fuscous markings on vertex and inner anteapical cell ( Fig. 8 at).

Male. Dimensions. (n = 5) Length: apex of vertex to apex of tegmina 2.5 mm; apex of vertex to apex of abdomen 2.5–2.6 mm; vertex medially 0.4 mm; vertex next to eye 0.3 mm; pronotum medially 0.3 mm. Width: head 0.8–0.9 mm; pronotum 0.8 mm. Ocellar diameter 28.0 µm; ocellocular distance 24.5–37.1 µm.

Genital capsule. Pygofer, in lateral view, with ventroposterior margin broadly rounded ( Fig. 1 y), ventral part with membranous region invaded by long, narrow, sclerotized process ( Fig. 1 y). Pygofer lobe acutely triangular, sclerotized, with denticulate microsculpture; ventroposterior margin with short, sclerotized, ventral tooth ( Fig. 1 y); base of lobe about one third as wide as width of pygofer. Plate apex truncate, rectangular, apices usually of similar length; lateral margins straight, merging uniformly with apex; 7–10 macrosetae, usually uniseriate ( Fig. 2 x); plate 1.5–1.7 times as long as wide. Aedeagal shaft, in lateral view, arising ventrally from atrium; preatrium reduced; entire shaft uniformly C-shaped ( Fig. 3 ah); dorsal apodeme elongate, curved towards apex of shaft; gonopore elongate, lateroventral ( Fig. 4 af). Style distal part far from anterior medial lobe; apex of apophysis acute; apophysis acutely angled to preapical lobe, preapical lobe acute; apophysis with 3–4 ventral teeth ( Fig. 5 x). Connective, in dorsal view, with stem apex triangular, wider than stem base ( Fig. 6 ad).

Female. Dimensions. (n = 3) Length: apex of vertex to apex of tegmina 2.6–2.8 mm; apex of vertex to apex of abdomen 3.0– 3.1 mm; vertex medially 0.5 mm; vertex next to eye 0.3 mm; pronotum medially 0.3 mm. Width: head 0.9 mm; pronotum 0.8 mm. Ocellar diameter 26.3–34.4 µm; ocellocular distance 24.6–40.7 µm.

Genitalia. Sternite 7 with base rectangular; hind margin ligula wide, triangular; apex deeply notched ( Fig. 7 bl).

Material examined. Holotype male. South Africa, KwaZulu-Natal. Bushman’s Neck Nature Reserve , 29°53ʹS, 29°11ʹE, 6.iv.1994, M. Stiller, sweeping grass ( SANC) GoogleMaps   . Paratypes. 3♂, 14♀. South Africa, Kwa- Zulu-Natal   . 1♂, 3♀, same data as holotype GoogleMaps   ; Lesotho. 2♂, 11♀, Sehlabathebe Nature Reserve , 29°53ʹS, 29°04ʹE, 1.iv.1994, M. Stiller, sweeping, grass ( BMNH, SANC) GoogleMaps   .

Remarks. A combination of characters distinguish P. odontopygeus   from a number of similar species. The tooth on the ventral margin of the pygofer lobe ( Fig. 1 y), the uniformly C-shaped aedeagal shaft and dorsal apodeme ( Fig. 3 ah), and the shape of the female sternite 7 ( Fig. 7 bl) are distinguishing features of P. odontopygeus   . Species with a similar shape of the plate are P. caenophallus   ( Fig. 2 y) and P. trunculidiscus   sp. n. ( Fig. 2 j). The modified aedeagus ( Fig. 3 ak) and the absence of the tooth on the pygofer lobe ( Fig. 1 d) of P. odontopygeus   distinguish it from P. caenophallus   . Of use in distinguishing P. caenophallus   and P. odontopygeus   is the position and number of macrosetae on the plate. In P. caenophallus   the macrosetae are grouped subapically or somewhat medially ( Fig. 2 y), whereas in P. odontopygeus   the macrosetae extend across most of the lateral margin ( Fig. 2 x). In P. trunculidiscus   the style has the distal part close to the anterior medial arm ( Fig. 5 j) and the aedeagal shaft is U-shaped ( Fig. 3 z), but has a similar arrangement of macrosetae, although the apex of the plate is abruptly merged with the lateral margin ( Fig. 2 j). Specimens of P. odontopygeus   and P. indistinctidiscus   both occur at Bushman’s Neck and Sehlabathebe. Differentiation between these two species is based on the plate shape, ratio of plate length to width and the shape of the pygofer in lateral view. In P. indistinctidiscus   the plate ( Figs 2 ag & ah) is 1.0–1.4 times as long as wide and the pygofer is as in Fig. 1 m. In P. odontopygeus   the plate ( Fig. 2 x) is 1.5–1.7 times as long as wide and the pygofer is as in Fig. 1 y. However the following structures of P. indistinctidiscus   and P. odontopygeus   share some similarities: style ( Figs 5 q & x, respectively), aedeagus ( Figs 3 af & ah, respectively) and partially sternite 7 of the female ( Figs 7 x –aa & bl, respectively).

SANC

Agricultural Research Council-Plant Protection Research Institute