Eusarimissus hezhouensis, 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 hezhouensis sp. nov.

Diagnosis.

This new species looks similar to the species Eusarima (Eusarima) triphylla (Che, Zhang & Wang, 2012) known also from Guangxi Province, but it differs by: 1) the early bifurcation of CuA before MP (Fig. 4 ), while almost at the same level in E. (E.) triphylla ( Che et al. 2012, figs 3, 6); 2) the male anal tube widest slightly below middle in dorsal view (Fig. 7 ), while widest in apical 1/2 in the latter species ( Che et al. 2012, fig. 9); 3) the female anal tube shorter, 1.6 times longer in the length at middle than widest part in dorsal view (Fig. 12 ), while 2.4 times in E. (E.) triphylla ( Che et al. 2012, fig. 13); 4) the apical margin of female sternite VII shallowly concave (Fig. 17 ), while roundly convex medially in E. (E.) triphylla ( Che et al. 2012, fig. 14); 5) the single Pcu of the hind wing, while triforked in E. (E.) triphylla ( Che et al. 2012, fig. 7).

Type materials.

Holotype: ♂, China: Guangxi Province, Hezhou, Qichong Nature Reserve, 24°13'6"N, 110°48'34"E, 180 m, 7.viii.2018, coll. Feilong Yang & Kun Zhao. Paratypes: 2♂♂, 1♀, same data as holotype.

Description.

Length: male (including forewings) (N = 3): 6.1-6.3 mm; female (including forewings) (N = 1): 6.4 mm.

Coloration. Vertex almost dark brown, the midline slightly yellow; anterior margin yellow; posterior margin yellow with some black (Fig. 1 ). Compound eyes silvery white (Figs 1-3 ). Frons brown, anterior area from apical margin to the middle level of compound eyes darker; median and sublateral carinae tawny (Fig. 3 ). Antennae brown (Fig. 3 ). Clypeus dark brown with some yellow (Fig. 3 ). Rostrum tawny. Gena tawny (Fig. 2 ). Pronotum dark brown, with yellow midline, some specimens with a yellow ovate marking at middle, the disc scattered with 6-8 yellow tiny nodules on each side; anterior margin yellow, posterior margin black (Fig. 1 ). Mesonotum mostly dark brown, midline broad yellow, sublateral carinae yellow; the basal median area with four large black spots, the triangular intersection of the anterior and posterior margins yellow (Fig. 1 ). Forewings dark brown, longitudinal veins black, with irregular pale-yellow transverse veins (Figs 1 , 2 , 4 ). Hind wing pale brown, darker apically (Fig. 5 ). Legs all tawny (Figs 2 , 3 ).

Head and thorax. Vertex 1.3 times wider than long in midline, posterior margin with the protruded level little shallower than anterior margin (Fig. 1 ). Frons 0.8 times longer in middle than broad at widest part, 1.4 times wider at the widest part than apical margin (Fig. 3 ); sublateral carinae obviously elevated from apex extending to basal 1/6, not reaching the clypeus (Fig. 3 ). Pronotum with posterior margin 2.6 times wider than long in midline (Fig. 1 ). Mesonotum with anterior margin 1.7 times wider than long in midline (Fig. 1 ). Forewings 2.6 times longer in longest part than widest part, MP vein firstly forked at apical 1/3, MP1+2 forked again at apical 1/5 (Fig. 2 ) or unforked (Fig. 4 ), MP3+4 bifurcate at apical 1/6 (Fig. 4 ) or unforked (Fig. 2 ); CuA forked near middle, before the first fork of MP, CuA1 simple and sinuate, CuA2 simple and straight (Figs 2 , 4 ). Metatibiotarsal formula: 2-6/8/2.

Male genitalia. Anal tube slender in lateral view, broad in basal 1/3 then gradually narrowing to the apex (Fig. 6 ); in dorsal view anal tube long cylindrical, broadest below middle, the length in midline 2.7 times longer than the widest part, dorsal margin almost straight (Fig. 7 ); anal opening located below middle (Fig. 7 ); epiproct exceeding to the middle of anal tube (Fig. 7 ). Pygofer with the highest length in midline 2.0 times longer than the width at middle (Fig. 6 ); dorso-apical angle obtuse and oblique (Fig. 6 ). Gonostylus in lateral view with dorsal margin oblique and almost straight, posterior margin slightly concaved at middle, ventral margin deeply convex in the apex with caudo-ventral angle rounded (Figs 6 , 8 ). Capitulum of gonostylus spiniform, with a small auriform process near base (Figs 6 , 8 ). Periandrium tubular, dorsal lobe with ventral margin expanded (edl) near middle, fused with lateral lobes at basal 1/3 (Figs 9 , 10 ); in ventral view dorsal lobe slightly broaden near the apex, lateral lobes bifurcate at middle near the apex, ventral lobe with dorsal margin slightly concave at middle (Fig. 11 ); ventral lobe (vl) only reaching the apical 1/3 of periandrium. Aedeagus symmetrical, with a pair of hooked processes (ap) derived from apical 1/3 extending along the ventral margin of periandrium reaching to the basal 1/3 (Figs 9 , 10 ), in ventral view this pair of processes slightly curved inward (Fig. 11 ).

Female genitalia. Anal tube in dorsal view conical, 1.6 times longer in midline than widest part (Fig. 12 ); apical margin sharp, lateral margins gradually broadening from apex to basal 1/3 (Fig. 12 ); anal opening situated at basal 1/3 (Fig. 12 ). Gonoplacs in dorsal view with outer lateral margins roundly convex, the apical part and median part membranous (Fig. 13 ); in lateral view rectangular, 1. 6 times longer in longest part than widest part, the apical margin rounded (Fig. 14 ). Gonapophysis IX in lateral view broad, dorsal margin elevated and convex at middle, basal 1/3 with a needle-like process (Fig. 15 ). Gonapophysis IX in dorsal view widest near middle, basal half broader than apical half, outer area concave inward near apical 1/3 (Fig. 16 ). Anterior connective lamina of gonapophysis VIII with three teeth at apex and three teeth on the outer lateral margin, inner lateral margin without teeth (Fig. 18 ). Endogonocoxal process reaching to the same level of apex of anterior connective lamina (Fig. 18 ). Gonocoxa VIII long rectangular, perpendicular the gonapophysis VIII (Fig. 18 ). Apical margin of sternite VII mostly straight, with middle part very shallowly incised and two prominent dorso-lateral angles in ventral view (Fig. 17 ).

Etymology.

The name refers to the type locality of the species.

Phylogeny.

The molecular sequences obtained were registered in GenBank with the following accession numbers: MN955873 (18S, primers: 3F-Bi + A2-9R), MN955872 (28S D3-D5, primers: Ai-D4D5r), MN955852 (28S D6-D7, primers: EE-MM), MN954323 (COXI). Cytb sequence was failed to obtain. Molecular analysis based on available sequences of the 18S rRNA, 28S rRNA, COXI and Cytb genes confirms the morphological data positioning the new taxon in Sarimini . The species takes place as sister to a non-described but already sequenced Sarimini species Eusarima sp. 4 in Wang et al. (2016), both being sister taxa to Longieusarima lunulia Wang, Bourgoin & Zhang, 2017 (Fig. 19 ). Barcoding part of COXI gene of Eusarimissus hezhouensis sp. nov. differs by 107 bp and 115 bp from Eusarima sp. 4 and L. lunulia Wang, Bourgoin & Zhang, 2017 respectively over the total length of 681 bp.

Figures

Figure 19. Maximum likelihood tree of Sarimini species based on combined sequences (18 S, 28 S, COXI, Cytb) with Darwallia as outgroup. At each node, values denote ML bootstrap support. The name ' Gen. nov. ', ' Eusarima sp. 1 ', ' sp. 2 ', and ' sp. 4 ' refer to the same taxa as in Wang et al. (2016).

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.