Eusarimissus, Wang & Bourgoin, 2020

Wang, Menglin & Bourgoin, Thierry, 2020, A new genus of the tribe Sarimini (Fulgoromorpha, Issidae) from the Guangxi Province of China, ZooKeys 912, pp. 13-23 : 13

Eusarimissus gen. nov.

Type species.

Eusarimissus hezhouensis sp. nov., here designated.

Diagnosis.

This new taxon appears similar to Eusarima but differs by: 1) Vertex much longer, around 1.3 times wider than long in midline (Fig. 1 ), but around 1.6 times wider in Eusarima ( Chan and Yang 1994, fig. 45A); 2) MP vein forking late in apical 1/3, obviously after CuA (Fig. 4 ), while MP and CuA fork near middle, almost at the same level in Eusarima ( Chan and Yang 1994, fig. 45C); 3) A2 lobe on hind wing as wide as Pcu-A1 lobe (Fig. 5 ), while larger in Eusarima ( Chan and Yang 1994, fig. 45D); 4) dorsal lobe of periandrium without the posterolateral process (Fig. 9 ) in Eusarima ( Chan and Yang 1994, fig. 45H).

From Longieusarima , Eusarimissus is easily separated by its shorter and wider vertex, the longer sublateral carinae of frons widely surpassing the level of the ventral margin of the antenna, and the general schema of the tegmina with a longer ScP+RA vein and a late-forking MP vein, well after the forking of CuA. Male genitalia also easily differentiated these two genera by the long subapical aedeagus processes in Longieusarima , shorter and in the apical 3/4 in Eusarimissus .

Description.

Head with compound eyes a little wider than pronotum and mesonotum (Fig. 1 ). Vertex hexagonal, a little wider than long in midline, median carina weakly present or absent on the disc; margins elevated, anterior margin obviously angularly convex at middle, lateral margins nearly straight and parallel, posterior margin angularly concave (Fig. 1 ). Frons rounded, wider than long, margins elevated; apical margin nearly straight, lateral margins expanding outward below antennae with lateral angles rounded (Fig. 3 ); median carina apparently elevated from apex extending to frontoclypeal suture (Fig. 3 ); sublateral carinae obviously elevated from the apex near to the base, but not reaching to the frontoclypeal suture, with lateral ventral angles rounded (Fig. 3 ). Frons smooth, without any tubercles (Fig. 3 ). Frontoclypeal suture strongly angularly convex (Fig. 3 ). Antenna with scape extremely short, pedicel rounded (Fig. 3 ). Clypeus smooth, without median carina (Fig. 3 ). Rostrum reaching to midcoxae, apical segment almost the same length with subapical one. Gena in lateral view oblique (Fig. 2 ). Pronotum triangular, almost same length with vertex in midline; margins elevated, anterior margin angularly protruded, posterior margin straight; median carina very weakly present or absent, with several inconspicuous tubercles on the disc (Fig. 1 ). Mesonotum triangular, a little wider than pronotum in midline, tricarinated on the disc, anterior margin straight (Fig. 1 ). Forewings obviously longer than broad, longitudinal veins distinctly elevated (Figs 1 , 2 , 4 ); costal area narrow, ScP+R forked at the base, ScP+RA and RP veins parallel, both extremely long, respectively extending to the apical 4/5 of costal margin and the apical margin (Figs 2 , 4 ); MP straight, bifurcated into MP1+2 and MP3+4 at apical 1/3, forking again or not apically (Figs 2 , 4 ); CuA bifurcated well before MP, slightly before Pcu and A1's junction (Figs 1 , 2 , 4 ); clavus closed, CuP long, extending to the same level of ScP+RA, Pcu and A1 fused slightly beyond the middle of clavus (Fig. 4 ). Hind wings developed, of Sarimini type with 3-lobes (Fig. 5 ); Pcu-A1 lobe as wide as ScP-R-MP-Cu lobe, Pcu and A1 anastomosing at a medium distance, Pcu, A11 and A12 single (Fig. 5 ); A2 lobe developed, as wide as Pcu-A1 lobe, margin regularly slightly convex, A2 vein simple, non-branched (Fig. 5 ). Metatibia with two lateral spines on apical half (Fig. 2 ).

Male genitalia. Anal tube in lateral view long and narrow, reaching to the posterior margin of gonostyli, basal part expanded, ventral margin nearly straight (Fig. 6 ). Pygofer in lateral view rectangular, obviously longer than broad, dorsal margin nearly straight, posterior margin slightly convex and parallel to anterior margin (Fig. 6 ). Gonostyli equilateral triangular in side view (Figs 6 , 8 ). Capitulum of gonostylus short and spinous, with an auriform process near base (Figs 6 , 8 ). Periandrium symmetrical (Figs 9 , 10 ), with a dorsal lobe (dl), biforked lateral lobes (ll) and a ventral lobe (vl); dorsal and lateral lobes almost the same length, ventral lobe much shorter. Aedeagus with a pair of processes derived from the apical 3/4 (Figs 9 , 10 ).

Female genitalia. Gonoplacs in dorsal view fused at middle in basal 1/3 (Fig. 13 ); in lateral view long rectangular, longer than wide (Fig. 14 ). Gonapophysis IX in lateral view broad, dorsal margin sinuate, basal 1/3 with a needle-like process (Fig. 15 ); ventral margin concave (Fig. 15 ). Gonapophysis IX in dorsal view nearly triangular, the basal half broader than the apical half (Fig. 16 ). Gonospiculum bridge in lateral view rectangular with a short needle-like process at base (Fig. 15 ). Anterior connective lamina of gonapophysis VIII subtriangular, with teeth at apex and teeth on the outer lateral margin, inner lateral margin without teeth (Fig. 18 ). Endogonocoxal process membranous (Fig. 18 ). Gonocoxa VIII long rectangular, posterior and anterior margins parallel and concave (Fig. 18 ).

Etymology.

This name is an arbitrary association between the genera names " Eusarima " and " Issus " referring to the close relationship of this genus to Eusarima in the Issidae tribe Sarimini . The gender is masculine.

Distribution.

China (Guangxi Province).

Figures

Figures 1 - 5. Eusarimissus hezhouensis sp. nov. 1 adult (holotype), dorsal view 2 adult (holotype), lateral view 3 adult (holotype), frontal view 4 forewing (paratype) 5 hind wing (paratype).

Figures 6 - 11. Eusarimissus hezhouensis sp. nov., holotype. 6 male genitalia, lateral view 7 male anal tube, dorsal view 8 gonostylus, lateral view 9 phallic complex, right lateral view 10 phallic complex, left lateral view 11 phallic complex, ventral view. Abbreviations: dl: dorsal lobe of periandrium; ll: lateral lobe of periandrium; vl: ventral lobe of periandrium; edl: expansion on dorsal lobe of periandrium; ap: aedeagus processes.

Figures 12 - 18. Eusarimissus hezhouensis sp. nov., paratype. 12 female anal tube, dorsal view 13 gonoplacs, dorsal view 14 gonoplacs, lateral view 15 gonapophysis IX and gonospiculum bridge, lateral view 16 gonapophysis IX and gonospiculum bridge, dorsal view 17 sternite VII, ventral view 18 gonocoxa VIII and gonapophysis VIII, ventral view.