Pusulissus, Bourgoin & Wang, 2020

Bourgoin, Thierry & Wang, Menglin, 2020, Parahiraciini (Hemiptera, Fulgoromorpha, Issidae): one new genus, two new species and three new subtribes, ZooKeys 997, pp. 69-94 : 69

Pusulissus gen. nov. Figs 2-7 , 8-12 , 13-14 , 15-20 , 21-24 , 25-30 , 31-35 , 36-37 , 38-44

Type species.

Pusulissus phiaoacensis sp. nov.

Diagnosis.

This genus is similar to Tetricodes Fennah, 1956, from which it differs as follows: 1) The absence of the frontal black median tubercle on the disc of frons (Figs 5 , 28 ); 2) Median carina of frons well distinct, extending from the dorsal margin almost to the frontoclypeal suture (Figs 5 , 28 ), while it is only present in the dorsal part of the frons or invisible in Tetricodes ( Zhang and Chen 2009, fig. 21); 3) The forewing distinctly broadest in the basal 1/3 (Figs 6 , 29 ), while regularly convex in Tetricodes ( Zhang and Chen 2009, fig. 4).

This genus is also very similar to Thabena Stål, 1866, but differs by 1) Its vertex with anterior margin in dorsal view very slightly angularly convex (Fig. 4 ) or straight (Fig. 27 ), while roundly convex in Thabena ( Chen et al. 2014, figs 2-74C); 2) Frons much longer, more than 1.2 times longer in midline than widest part (Figs 5 , 28 ), but wider than long in Thabena , less than 0.9 times longer in midline than widest part ( Chen et al. 2014, fig. 2-74E).

Description.

Head with the compound eyes a little wider than pronotum (Figs 4 , 27 ). Vertex nearly rectangular, slightly wider than long, without median carina or median carina very weakly present; anterior margin very slightly protruded (Fig. 4 ) or almost straight (Fig. 27 ), lateral margins parallel, posterior margin angularly concave medially (Figs 4 , 27 ). Frons obviously longer than wide, apical and lateral margins carinated and elevated, dorsal margin deeply concave at middle, frons slightly narrower in the middle level of the compound eyes, then gradually broadened below the lower margin of the compound eyes (Figs 5 , 28 ); median carina obviously elevated from the dorsal margin extending to near base, but not reaching to frontoclypeal suture (Figs 5 , 28 ); disc with several tubercles in its dorsal part and lateral areas (Figs 5 , 28 ). Frontoclypeal suture straight (Fig. 5 ) or slightly convex (Fig. 28 ). Clypeus flattened, without median carina or median carina very weak, almost invisible (Figs 5 , 28 ). Rostrum long, reaching to hind coxae; third segment almost as long as second one. Genae in lateral view flattened and oblique, with a small protuberance near base (Figs 3 , 26 ). Pronotum triangular, anterior and posterior margins elevated, without carina (Figs 4 , 27 ), paranotal lobes developed. Mesonotum inverted triangular, a little longer than pronotum at midline, without carina (Figs 4 , 27 ). Forewings twice longer than broad, longitudinal veins obvious and elevated, transverse veins not elevated, but existing in the whole forewing, apical margin oblique, triangular-shaped (Figs 6 , 29 ). Vein ScP+R firstly separated near base after a short common stem, ScP+RA long, reaching apical 1/5 of costal margin, terminal of RP vein reaching to apical margin of forewing (Figs 6 , 29 ); MP vein firstly forked near basal 1/4, MP1+2 forked again at apical 1/4, MP3+4 forked again at middle, MP3 short, just reaching bifurcation of MP1 and MP2 or slightly beyond bifurcation, MP4 long, extending to apical margin of forewing; CuA simple, sinuate, extending to apex of forewing (Figs 6 , 29 ). Clavus closed, reaching to almost middle of forewing, Pcu and A1 fused at apical 1/3 of clavus (Figs 6 , 29 ). Hindwing with longitudinal veins well developed, with a set of numerous transverse veins, CuP-Pcu-A1 lobe distinctly wider than ScP-R-MP-Cu lobe, A2 lobe very narrow with A2 vein absent (Figs 7 , 30 ); MP and CuA not fused, Pcu and A1 also separated (Figs 7 , 30 ). Hind tibia with 2 lateral spines on apical half (Fig. 3 ). Metatibiotarsal formula: 2-(7-8)/(5-8)/2.

Male genitalia. Anal tube in lateral view relatively large and thick, with lateral lobes on apical half extended downwards (Figs 8 , 31 ). Pygofer subrectangular in lateral view (Figs 8 , 31 ). Gonostyli nearly triangular in profile, dorsal margin sinuate, posterior margin deeply concave to a groove in apical half then strongly convex posteriorly, caudo-ventral angle strongly convex and rounded (Figs 10 , 33 ). Capitulum broader than high, triangular, with a relatively long meniscate lateral process with both apical parts obtuse, apical process sharp (Figs 10 , 33 ). Periandrium symmetrical, with dorsal and ventral margins parallel, shallowly U-shaped, divided into dorso-lateral lobe (dll) and ventral lobe (vl), ventral lobe very slightly shorter than dorso-lateral one (Figs 11 , 13 , 34 , 36 ). Aedeagus (Ade) with a pair of lateral processes (Adep) originating from the middle, directed anteriorly and upcurved (Figs 11 , 13 , 34 , 36 ).

Female genitalia. Gonoplacs in lateral view nearly rectangular, dorsal margin straight, anterior and posterior margins nearly parallel to each to other, posterior margin with apical half membranous, ventral margin with the needle-shaped basal part (Figs 16 , 40 ); in dorsal view lateral margins convex outward, median area fused in apical half (Fig. 39 ). Gonapophysis IX in dorsal view widest a little beyond middle then gradually sharpening to apex (Figs 17 , 41 ); in lateral view broad, widest near middle, divided into upper and lower parts, both with sharp tips, bifurcate near apex (Figs 18 , 42 ); upper dorsal margin sinuate, flattened at basal 1/3 and middle part obviously convex upward then gradually sloping posteriorly (Figs 18 , 42 ); ventral lower margin with apical half sloping downwards (Figs 18 , 42 ). Gonospiculum bridge small (Figs 17 , 18 , 41 , 42 ). Anterior connective lamina of gonapophysis VIII with obscure teeth on apex and outer-lateral margin, inner-lateral margins without teeth (Figs 20 , 44 ). Endogonocoxal process membranous, slightly shorter than anterior connective lamina of gonapophysis VIII (Figs 20 , 44 ). Gonocoxa VIII connects with gonapophysis VIII by a rectangular shape (Figs 20 , 44 ).

Etymology.

The name is an arbitrary association from the Latin word “pusulosus” which means ‘pustulous’, referring to the tubercles or pustules present on the frons and “issus” referring to the family. The name is treated as masculine.

Figures

Figures 2 - 7. Pusulissus phiaoacensis sp. nov. 2 adult (holotype), dorsal view 3 adult (holotype), lateral view 4 head and thorax (holotype), dorsal view 5 adult (holotype), frontal view 6 forewing (paratype) 7 hindwing (paratype). Scale bars: 1 mm.

Figures 8 - 12. Pusulissus phiaoacensis sp. nov., male, holotype. 8 genitalia, lateral view 9 anal tube, dorsal view 10 gonostylus, lateral view 11 phallic complex, right lateral view 12 phallic complex, ventral view. Scale bars: 0.2 mm.

Figures 13 - 14. Pusulissus phiaoacensis sp. nov., male, holotype. 13 phallic complex, right lateral view 14 apex of phallic complex, posterior view. Abbreviations: dll: dorso-lateral lobe of periandrium; Ade: Aedeagus; vl: ventral lobe of periandrium; Adep: Aedeagus processes. Scale bars: 0.2 mm.

Figures 15 - 20. Pusulissus phiaoacensis sp. nov., female, paratype. 15 anal tube, dorsal view 16 gonoplac, lateral view 17 gonapophysis IX and gonospiculum bridge, dorsal view 18 gonapophysis IX and gonospiculum bridge, lateral view 19 sternite VII, ventral view 20 gonocoxa VIII and gonapophysis VIII, lateral view. Scale bars: 0.2 mm.

Figures 21 - 24. Habitus and habitat of Pusulissus phiaoacensis sp. nov. 21 - 23 habitus in nature (Photo G. Kunz) 24 habitat (Photo T. Bourgoin).

Figures 25 - 30. Pusulissus coronomensis sp. nov. 25 adult (holotype), dorsal view 26 adult (holotype), lateral view 27 head and thorax (holotype), dorsal view 28 adult (holotype), frontal view 29 forewing (paratype) 30 hindwing (paratype). Scale bars: 1 mm.

Figures 31 - 35. Pusulissus coronomensis sp. nov., male, holotype. 31 genitalia, lateral view 32 anal tube, dorsal view 33 gonostylus, lateral view 34 phallic complex, right lateral view 35 phallic complex, ventral view. Scale bars: 0.2 mm.

Figures 36 - 37. Pusulissus coronomensis sp. nov., male, holotype. 36 phallic complex, right lateral view 37 apex of phallic complex, posterior view. Abbreviations: dll: dorso-lateral lobe of periandrium; Ade: Aedeagus; vl: ventral lobe of periandrium; Adep: Aedeagus processes. Scale bars: 0.2 mm.

Figures 38 - 44. Pusulissus coronomensis sp. nov., female, paratype. 38 anal tube, dorsal view 39 gonoplacs, ventral view 40 gonoplacs, lateral view 41 gonapophysis IX and gonospiculum bridge, dorsal view 42 gonapophysis IX and gonospiculum bridge, lateral view 43 sternite VII, ventral view 44 gonocoxa VIII and gonapophysis VIII, lateral view. Scale bars: 0.2 mm.