Duplexissus, Wang & Zhang & Bourgoin, 2019

Wang, Menglin, Zhang, Yalin & Bourgoin, Thierry, 2019, On the tribe Sarimini with two new genera from south of China (Hemiptera, Fulgoromorpha, Issidae), Zootaxa 4706 (2), pp. 375-383 : 378-380

Duplexissus gen. nov.

Type species: Duplexissus punctatulus sp. n., here designated.

Diagnosis. This new genus is very similar to Eusarima Yang, 1994 in general appearances, but differs by: phallic complex with two pairs of long processes directed to cephalad, one of it dentated ( Fig. 21 ), while phallic complex with a pair of long process directed to cephalad and a pair of relatively short process without teeth directed to caudal in Eusarima ( Chan & Yang, 1994, fig. 45H).

This new genus also resembles to Sinesarima Yang, 1994 , but differs by: 1) Forewing with ScP+RA extremely long ( Fig. 16 ), but ScP+RA very short in Sinesarima ( Chan & Yang, 1994, fig. 40C); 2) Frons with median carina and sublateral carinae all long, from the apex extending to near base ( Fig. 15 ), but much shorter in Sinesarima , median carina extending less than middle, sublateral carinae only present in apical 1/4 ( Chan & Yang, 1994, fig. 40B).

This new genus is also similar to Yangissus Chen, Zhang & Chang, 2014 , but differs by: 1) ScP+RA on forewing extremely long, reaching about apical 1/6 ( Fig. 16 ), but much shorter in Yangissus , only reaching to middle of forewing ( Chen et al., 2014, fig. 2-82F); 2) Vertex with apical margin angularly convex ( Fig. 14 ), but roundly convex in Yangissus ( Chen et al., 2014, fig. 2-82C); 3) Posterior margin of pygofer smooth, without posterior spine ( Fig. 18 ), but with an obvious and sharp posterior spine near the apex on posterior margin ( Chen et al., 2014, fig. 2- 82I).

Etymology. The name refers to the phallic complex with two pairs of processes in the male genitalia. The gen- der is masculine.

Description. Head with compound eyes slightly wider than pronotum ( Figs 12, 14 ). Compound eyes axis in dorsal view converging ( Figs 12, 14 ). Vertex rectangular, broader than long, margins elevated, anterior margin slightly angularly convex, posterior margin anterior angularly concave at middle, median carina weakly present ( Figs 12, 14 ) or absent on disc. Frons in widest part a little wider than long in midline, broaden below level of antennae, the lateral angles rounded ( Fig. 15 ); all margins elevated, dorsal margin slightly concave at middle, lateral margins gradually broadening from apex to the level below the antennae; median carina present from apex extending to near base with apical half elevated and basal part unconspicuous ( Fig. 15 ), sublateral carinae weakly present from apex extending to near base ( Fig. 15 ). Frons with apical and lateral areas distributed with some large tubercles ( Fig. 15 ). Frontoclypeal suture very slightly convex, almost straight ( Fig. 15 ). Clypeus smooth ( Fig. 15 ). Rostrum reaching hind coxae, the apical segment slightly shorter than subapical segment. Gena in lateral view oblique ( Fig. 13 ). Antenna with scape extremely short, pedicel rounded ( Fig. 15 ). Pronotum triangular, a little longer than vertex, margins elevated, anterior margin angularly protruded, posterior margin straight, with a small incision on each side of midline, median carina weakly present, disc with few small tubercles on each side of lateral area ( Figs 12, 14 ). Mesonotum longer than pronotum in midline, anterior margin straight, tricarinated on the disc ( Figs 12, 14 ). Forewings obviously longer than broad, longitudinally elevated; costal area narrow, ScP+RA and RP in a common stem at base, ScP+RA and RP all extremely long, respectively reaching to the apical 1/6 and the outer margin of forewing ( Figs 13, 16 ); MP forking at the middle into a forked MP1+2 and a forked or unforked MP3+4; CuA first forking almost in the same level with MP ( Figs 13, 16 ). Clavus closed, Pcu and A1 fused at middle of clavus ( Figs 12, 16 ). Hind wings developed, of Sarimini type with 3 well-developed lobes, Pcu-A1 lobe as wide as ScP-R-MP-Cu lobe, Pcu and A1 anastomosing on a long distance, Pcu unbranched, A2 lobe developed, slightly wider than Pcu-A1 lobe, A2 vein unbranched ( Fig. 17 ). Metatibia with two lateral spines on apical half.

Male genitalia. Anal tube in lateral view long and broad ( Fig. 18 ). Pygofer in lateral view rectangular, posterior margin slightly convex ( Fig. 18 ). Gonostylus trapezoid in lateral view, dorsal margin convex and elevated at apical 1/3, ventral margin with caudo-ventral angle deeply convex, posterior margin sinuate ( Figs 18, 20 ). Capitulum of gonostylus short and broad, antero-lateral margin with a process near base ( Figs 18, 20 ). Periandrium U-shaped, divided into dorsal, lateral and ventral lobes in the apical part, dorsal lobe with a pair of dentated processes originated from apical 1/4 of each side ( Fig. 21 ). Aedeagus with pair of processes originated from apical 1/4 directed to cephalad in lateral view ( Fig. 21 ).

Distribution. China (Yunnan province).

Figures

FIGURES 18–22. Duplexissus punctatulus sp. n., male 18. Genitalia, lateral view; 19. Anal tube, dorsal view; 20. Gonostylus, lateral view; 21. Phallic complex, lateral view; 22. Phallic complex, ventral view. Abbreviations: adp: anterior part of dentated processes on periandrium dorsal lobe; pdp: posterior part of dentated processes on periandrium dorsal lobe; ap: processes on aedeagus.

FIGURES 12–17. Duplexissus punctatulus sp. n., male 12. Habitus, dorsal view; 13. Habitus, lateral view; 14. Head and thorax, dorsal view; 15. Habitus, frontal view; 16. Forewing; 17. Hind wing. Venation terminologies on Figs 16, 17 as in the text.