Introrsa Dai and Zhang

Dai, Wu, Cui, Wei, Xiao, Bin & Zhang, Yalin, 2010, A new genus and species of Old World Opsiini (Hemiptera: Cicadellidae: Deltocephalinae), with a key to genera and species checklist for the tribe, Zootaxa 2607, pp. 55-68 : 58-59

Introrsa Dai and Zhang , gen. nov.

Type species: Introrsa yaoquensis sp. nov., here designated.

Large sized leafhoppers measuring 8.2–8.5 mm long. Body elongate, robust. Head including eyes as wide as pronotum. Crown longer medially than next to eyes but shorter than width between eyes; anterior margin roundly produced anteriorly in dorsal view. Transition of vertex and frontoclypeus rounded, with two black spot. Eyes fairly large. Ocelli situated on frontal margin of crown next to eye, separated from eye by distance equal to two times of own diameter ( Fig. 1 ). Frontoclypeus narrow, longer than width between eyes. Clypellus slightly expanded apically, apex slightly produced beyond gena ( Fig. 3 ). Pronotum with anterior margin roundly produced and posterior margin slightly concave. Scutellum almost as long as pronotum, with transverse suture slightly curved and depressed. Forewing elongate; appendix wide; inner subapical cell open; with 4 apical cells ( Fig. 2 ). Profemur row AM with one preapical macrosetae (AM1), intercalary row with one row of 21 fine setae, row AV setae short and stout. Hind femora with setal formula 2+2+1. Hind tibia nearly straight, armed with following stout setae (following Rakitov, 1998): PV 22, PD 14, AD 24.

Male pygophore slightly narrowed to apex, posterior margin blunt, with many macrosetae in caudal 0.33 ( Fig. 4 ). Subgenital plate rather triangular, longer than pygophore, lateral margin slightly convex in basal part and slightly concave in apical part, with lateral row of macrosetae ( Fig. 5 ). Connective Y–shaped, articulated with aedeagus, stem and arms well developed ( Fig. 6 ). Style robust, slightly longer than connective, with developed preapical lobe ( Figs. 6, 7 ). Aedeagus with pair of shafts divided near base, paired gonopore apical, each shaft with a long basal process at inner margin, dorsal apodeme developed ( Figs. 8, 9 ).

Remarks. This new genus resembles Opsius Fieber 1866 , but differs from the latter by the large and not wedge-shaped body, head as broad as pronotum, and aedeagus with socle not bulbous. The genus resembles species of Lampridius Distant externally, but may be distinguished by the large body, aedeagus with a basal process and pygofer without inner processes.

Etymology. The generic name refers to the mesal process of the aedeagal shaft. The gender is feminine.

Figures

FIGURE 3. Introrsa yaoquensis sp. nov. Face.

FIGURES 1 – 2. Introrsa yaoquensis sp. nov. 1. Habitus, dorsal view; 2. Habitus, lateral view.

FIGURES 4 – 9. Introrsa yaoquensis sp. nov. 4. Pygophore, lateral view; 5. Genital valve and subgenital plate, ventral view; 6. Connective and style; 7. Apical half of style, lateral view; 8. Aedeagus, lateral view; 9. Aedeagus, ventral view.