Lauriana Ren & Qin

Ren, Feng-Juan, Zheng, Li-Fang, Huang, Yi-Xin & Qin, Dao-Zheng, 2014, Lauriana Ren & Qin, a new genus of the tribe Tropidocephalini (Hemiptera: Fulgoromorpha: Delphacidae) from China, Zootaxa 3784 (1) : -

Lauriana Ren & Qin gen. nov.

( Figs 1–18 )

Type species. Lauriana senticosa Ren & Qin sp. nov., here designated.

Description. Slender, brown delphacids. Head including eyes distinctly narrower than pronotum ( Figs 1, 3 ). Vertex quadrate, slightly longer in midline than broad at base, anterior margin of vertex sinuate, slightly projecting in front of eyes, submedian carinae originating near middle of lateral carinae, converging and uniting at apex of vertex, Yshaped carina with stem obscure ( Figs 1, 3 ). Fastigium in lateral view rounded ( Fig. 2 ). Median carina of frons simple ( Fig. 4 ). Antennae cylindrical, very long, almost reaching apex of anteclypeus, scape shorter than pedicle ( Figs 1–4 ). Rostrum reaching metacoxae. Pronotum nearly as long as vertex in middle line, lateral carinae not reaching posterior margin ( Figs 1, 3 ). Mesonotum medially longer than vertex and pronotum together ( Figs 1, 3 ). Forewing elongate, much longer than abdomen, apical margin rounded, crossveins in middle ( Figs 1, 2 , 18 ). Spination of apex of hind leg 5 (3+2) (tibia), 6 (4+2) (basitarsus) and 4 (2nd tarsomere) ( Fig. 5 ). Post-tibial spur thick, concave on inner surface, without teeth on interior margin but with a small apical tooth ( Fig. 5 ).

Male genitalia. Pygofer in lateral view much taller than wide, dorsocaudally rounded, in caudal view much longer than wide, lateroventral margin asymmetrical, with single process on midventral margin ( Figs 6, 7 , 9–11 ). Suspensorium absent ( Figs 8 , 9, 12 ). Aedeagus attached to ventral margin of anal segment; phallobase asymmetrical, bearing a slender process arising near base; phallus tubular, n-shaped, apical part membranous with spines and numerous teeth ( Figs 6, 8 , 9, 12–15 ). Parameres long, diverging proximally and converging distally ( Figs 8 , 16 ). Diaphragm of pygofer open medially, basal transverse roundly produced medially, apicad of which to caudoventral margin of pygofer deeply sunk for containing apex of aedeagus ( Figs 6, 7 , 9, 11 ). Anal segment of male small, ring-like, without processes ( Figs 6–8 , 9, 12, 17 ).

Etymology. The generic name is an arbitrary combination of letters, and is regarded as feminine.

Remarks. This new genus is characterized by its long antennae ( Figs 1–4 ), submedian carinae uniting at apex of vertex ( Figs 1, 3 ), tegmina with crossveins in middle ( Fig. 18 ), and by the following characters of the male genitalia: lateroventral margin of male pygofer asymmetrical ( Figs 7 , 11 ), with single process on midventral margin ( Figs 6, 7 , 9–11 ); pygofer deeply sunk from the basal transverse of diaphragm to the caudoventral margin ( Figs 6, 7 , 9, 11 ); apical part of the phallus membranous ( Figs 6, 8 , 9, 12–15 ) and male anal segment without processes ( Figs 6–9, 12, 17 ).

Lauriana is similar to Malaxa Melichar, 1914 and Malaxella Ding & Hu, 1986 in having quadrate vertex, long antennae and male pygofer having ventral processes. However, the new genus differs from both genera in the anal segment without process (with process at left laterodistal angle in Malaxella and Malaxa ). The new genus differs from Malaxella in frons with lateral carinae widest at apex (widest at eyes in Malaxella ), the tegmina having crossveins in middle (situated at apical 1/3–2/ 5 in Malaxella ), lateral carinae of vertex convergent anteriad (distinctly expanded anteriad in Malaxella ) and the parameres symmetrical (asymmetrical in Malaxella ). It differs from Malaxa in the submedian carinae of vertex percurrent and uniting at apex (uniting before apex of vertex in Malaxa ) and the opening of pygofer asymmetrical (symmetrical in Malaxa ).

Figures

FIGURES 1 – 8. Lauriana senticosa Ren & Qin, sp. nov. 1. male adult, dorsal view; 2. male adult, left lateral view; 3. head and thorax, dorsal view; 4. frons and clypeus; 5. hind leg; 6. male genitalia, left lateral view; 7. male genitalia, posterior view; 8. anal segment, aedeagal complex, connective and paramere, left lateral view. Scale bars = 1 mm (Figs 1, 2); 0.2 mm (Figs 3 – 8).

FIGURES 9 – 18. Lauriana senticosa Ren & Qin, sp. nov. 9. male genitalia, left lateral view; 10. pygofer, ventral view; 11. pygofer, posterior view; 12. anal segment, aedeagal complex, connective and paramere, left lateral view; 13. aedeagus, left lateral view; 14. aedeagus, right lateral view; 15. distal limb of phallus, left lateral view; 16. parameres, posterior view; 17. anal segment, posterior view; 18. forewing. Scale bars = 0.2 mm (Figs 9 – 14, 16, 17); 0.1 mm (Fig. 15); 0.5 mm (Fig. 18).