Duplexissus punctatulus, 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 : 380-382

Duplexissus punctatulus sp. nov.

( Figs 12–22 )

Diagnosis. This new species is similar to Eusarima delira Yang, 1994 , but differs by: 1) Dorsal margin of gonostylus strongly convex, elevated on apical 1/3 ( Figs 18, 20 ), but very slightly convex in E. delira , nearly straight ( Chan & Yang, 1994, fig. 47E); 2) Capitulum of gonostylus short and broad ( Figs 18, 20 ), but long and narrow in E. delira ( Chan & Yang, 1994, fig. 47E); 3) Phallic complex with two pairs of long processes directed to cephalad, one of it dentated ( Fig. 21 ), but in E. delira , phallic complex with a pair of long process directed to cephalad and a pair of long process directed to caudal, all the processes without teeth ( Chan & Yang, 1994, fig. 47H).

Etymology. The name “ punctatulus ” refers to the numerous yellowish punctuate markings on the frons.

Description. Length: male (including forewings) (N=4): 4.3–4.5 mm.

Coloration. Vertex tawny, margins brown; with two inconspicuous brownish circular markings near base ( Figs 12, 14 ). Compound eyes dark brown, supported by tawny callus ( Figs 12, 14 ). Frons with brownish and light yellowish color mixed on the disc, median area brown, scattered with numerous small light yellow spots; sublateral carinae light yellow, lateral areas with around 11 yellow tubercles outside of sublateral carinae on each side, basal part of frons light yellow ( Fig. 15 ); anterior and lateral margins elevated and black, median carina brown extending from apex near to base, sublateral carinae light yellow from apex extending near base ( Fig. 15 ). Antennae brown ( Fig. 15 ). Postclypeus mostly black with apical area light yellow ( Fig. 15 ). Gena brown, in lateral view with small yellowish transverse fascia below compound eyes ( Fig. 13 ). Pronotum tawny, anterior and posterior margins brown; median carina light yellow and two small incisions besides the midline; disc with around five small yellow tubercles on each side of lateral area ( Figs 12, 14 ). Mesonotum tawny in median area, lateral areas dark brown, median and lateral carinae tawny ( Figs 12, 14 ). Forewings tawny, longitudinal veins tawny, transverse veins tawny; scattered with some irregular dark brown markings on the forewing ( Figs 13, 16 ). Hind wings brown ( Fig. 17 ). Legs light yellow, scattered with dark brown markings ( Fig. 15 ).

Head and thorax. Vertex 1.8 times wider in midline than long in midline, lateral margins parallel ( Figs 12, 14 ). Frons 1.1 times wider at widest part than long in midline, 1.4 times wider at widest part than apical margin ( Fig. 15 ); lateral margins gradually broadening from apex to basal 1/5, broadest at basal 1/5 ( Fig. 15 ). Pronotum 2.6 times wider at posterior margin than long in midline, 1.4 times longer in midline than vertex ( Figs 12, 14 ); anterior margin sharply angularly convex ( Figs 12, 14 ). Mesonotum with anterior margin 1.7 times wider than long in midline, 1.6 times longer in midline than pronotum, median carina and sublateral carinae developed from anterior margin to the base ( Figs 12, 14 ). Forewings 2.5 times longer at longest part than widest part, costal area relatively narrow, the area before middle of MP and CuA veins with less transverse veins ( Figs 13, 16 ); CuA almost forking the same level with MP ( Figs 13, 16 ), MP1+2 bifurcate at apical 1/6, MP3+4 unforked ( Fig.13 ) or forking at apical 1/9 ( Fig. 16 ), CuA1 and CuA2 unforked ( Fig. 16 ). Metatibiotarsal formula: (2)–6/9/2.

Male genitalia. Anal tube in lateral view with apical half broader ( Fig. 18 ); in dorsal view long cylindrical, 2.4 times longer in midline than widest part, widest slightly below middle, apical margin shallowly roundly convex, lateral margins inclined outward in apical 2/3 then narrowing to base in basal 1/3 ( Fig. 19 ); anal opening located at basal 1/3 of anal tube ( Fig. 19 ). Pygofer in lateral view with dorsal margin slightly sloping posterior, posterior margin slightly convex ( Fig. 18 ); tectiductus large and broad ( Fig. 18 ). Gonostylus in lateral view widest at middle; dorsal margin sloping anterior at basal 2/3 and apical 1/3 straight, ventral margin with caudo-ventral angle deeply convex, posterior margin concave at middle ( Figs 18, 20 ). Capitulum of gonostylus finger-shaped, antero-lateral margin with auriform process near base ( Figs 18, 20 ). Periandrium dorsal lobe in lateral view with apex triangular and tip pointed, ventral margin obviously oblique ( Fig. 21 ); bearing a pair of dentated processes originated from apical 1/4, this pair of processes with anterior part (adp) long, directed to cephalad, reaching basal 1/6 of periandrium and posterior part (pdp) short extending along the ventral margin of periandrium dorsal lobe and reaching the tip of the periandrium dorsal lobe ( Fig. 21 ); anterior part of dentated processes (adp) in ventral view slightly convex to outwardly at middle ( Fig. 22 ). Periandrium lateral lobe a little longer than dorsal lobe, apex rounded in lateral view, ventral margin strongly sclerotized ( Fig. 21 ); in ventral view apical margin rounded with median bifurcate ( Fig. 22 ). Periandrium ventral lobe almost the same length with dorsal lobe, apex pointed in lateral view ( Fig. 21 ), in ventral view with apical margin fan-shaped ( Fig. 22 ). Aedeagus with pair of long spinous processes (ap) originated from apical 1/4 extending along the ventral margin of periandrium reaching the basal 1/4 of periandrium ( Fig. 21 ), in ventral view this pair of processes directed downward ( Fig. 22 ).

Type materials. Holotype: ♂, China, Yunnan Province, Xishuangbanna, Mengla county, Menglun , N 21º 57′ 9.53′′, E 101º 12′ 3.05′′, 781 m, 13 viii 2011, coll. Guo Zheng ( IZCAS).

Paratypes: 3♂♂, same data as holotype ( IZCAS) .

Note. This species refers to the taxon “ Eusarima sp. 3” on the phylogeny tree in Wang et al. (2016). The Genbank accession numbers of the whole 18S, 28S (D3–D5), 28S (D6–D7), COXI and Cytb are available from Wang et al. (2016).

Figures

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.

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.