Sinonissus hamulatus Chang & Chen

Chang, Zhi-Min, Yang, Lin, Long, Jian-Kun & Chen, Xiang-Sheng, 2019, Three new species of the planthopper genus Sinonissus Wang, Shi & Bourgoin, 2018 from southwest China (Hemiptera, Fulgoromorpha, Issidae), ZooKeys 870, pp. 117-135 : 117

Sinonissus hamulatus Chang & Chen sp. nov. Figs 5 , 6 , 32-41 , 42-50

Type material.

Holotype: ♂, China: Guizhou, Jiangkou County, Fanjingshan National Nature Reserve (27°54'N, 108°38'E, 500-1800 m), 1-3 June 2002, X-S Chen leg.; paratypes: 10♂♂ 10♀♀, same data as holotype.

Diagnosis.

This species is similar to S. brunetus , but it differs from the latter by anal tube with spoon-like protrusion in lateral view ( Fig. 36 ) (without spoon-like protrusion in S. brunetus ); dorsal lobe of phallobase with rod-like cystiform processes at apical part ( Fig. 40 ) (without rod-like process in S. brunetus ); aedeagus with short hooked process, tip of process directed to dorso-posterior ( Fig. 40 ) (tip of process directed to dorso-anterior in S. brunetus ).

Description.

Body length: male 3.61-3.98 mm, female 4.12-4.52 mm. Forewing: male 2.97-3.39 mm, female 3.46-3.80 mm.

Coloration. General color pale yellow to yellowish brown ( Figs 5 , 6 ). Vertex, pronotum and mesonotum ( Fig. 32 ) pale yellow. Eyes brown to black ( Fig. 33 ). Forewings ( Fig. 5 ) pale yellow or yellowish brown, longitudinal veins pale brown, transverse veins pale white. Legs yellow brown, with tips of spines on hind tibiae and tarsi black.

Head and thorax. Head ( Fig. 32 ) including eyes slightly narrower than pronotum (0.75: 1.00). Vertex ( Fig. 32 ) shorter in middle than the wide at base (1.00: 3.00). Frons ( Fig. 34 ) longer in middle than the widest breath (1.09: 1.00), median carina with the apical margin obscurely forked, nearly reaching to frontoclypeal suture. Clypeus triangular, with distinct median carina ( Fig. 34 ). Pronotum ( Fig. 32 ) with median carina obscure, lateral carina reaching to the posterior margin. Mesonotum ( Fig. 32 ) triangular, without median carina. Forewings ( Fig. 35 ) elongate, 1.82 times as long as maximum breadth. Hindwings absolutely reduced. Hind tibiae each with two lateral spines, spinal formula of hind leg 7 –9– 2.

Male genitalia. Anal tube ( Fig. 37 ) irregularly ligulate in dorsal view, the widest in apical 1/3, longer in midline than the width (1.85: 1.00), in lateral view anal tube with spoon-like protrusion ( Fig. 36 ). Anal style ( Fig. 37 ) sturdy and long, located at the base third of anal tube. Pygofer ( Fig. 36 ) with dorsal margin slightly narrow than ventral margin. Genital styles ( Fig. 38 ) relatively rectangular, dorsal margin slightly arched. Capitulum of genital styles relative long, irregularly triangular, neck obvious ( Fig. 39 ). Phallobase ( Figs 40 , 41 ) with dorsal lobe finger-like cystiform process near apical part ( Fig. 40 : a), with relatively curved rod-like process in apical 1/3 ( Fig. 40 : b) in lateral view; lateral lobe splitting into two stout branches, the apical margin truncated in ventral view; ventral lobe short, unobvious lobe-like process near middle, reaching to 3/4 of dorsal lobe in lateral view, with three unobvious small lobes in ventral view. Aedeagus with short hooked process in the middle in lateral view, directed to dorso-posterior ( Figs 40 : c, 41: c).

Female genitalia ( Figs 42-50 ). Anal tube ( Fig. 45 ) nearly oval, longer in middle than the widest breadth (1.70: 1.00), the apical margin arched, with unobvious membranous triangular protuberance, the widest at the basal 1/2. Anal style long, located at the basal fifth of anal tube ( Fig. 45 ). Anterior connective lamina of gonapophysis VIII with obviously sclerous triangular process in basal dorsal margin, with three lateral teeth bearing three keels in lateral group and three apical teeth ( Fig. 46 ). Posterior connective lamina of gonapophysis IX ( Figs 47 , 48 ) relatively broad, median field symmetrical, with nearly circular prominences, apical margin deeply incised in middle (medial dorsal process) ( Fig. 47 ); ventroposterior lobes bent at obtuse angle (posterior ventral lobes), with membranous triangular process at inner region near the apical part ( Fig. 48 ). Gonoplacs ( Fig. 49 ) without keels. Hind margin of sternum VII median distinctly concave in ventral view ( Fig. 50 ).

Etymology.

This new species is derived from the Latin word hamulatus , referring to the short hamular process of aedeagus.

Host plant.

Unknown.

Distribution.

China (Guizhou).

Remarks.

This new species is distinguished from other species of this genus by: 1) anal tube irregularly ligulate in dorsal view, with spoon-like protrusion in lateral view ( Fig. 37 ); 2) phallobase with dorsal lobe rod-like cystiform processes at apical part, ventral lobes with three not obvious small lobes in ventral view ( Fig. 40 ); 3) aedeagus with short hooked process in middle in lateral view ( Fig. 40 ); 4) female genitalia with posterior connective lamina of gonapophysis IX in median field with nearly circular process ( Fig. 47 ).

Figures

Figures 1 - 8. Habitus of Sinonissus species. 1, 2 Sinonissus brunetus Wang, Shi & Bourgoin, 2018 3, 4 Sinonissus daozhenensis Chang & Chen, sp. nov. 5, 6 Sinonissus hamulatus Chang & Chen, sp. nov. 7, 8 Sinonissus longicaudus Chang & Chen, sp. nov. Scale bars: 0.5 mm.

Figures 32 - 41. Sinonissus hamulatus Chang & Chen, sp. nov. 32 head and thorax, dorsal view 33 head and thorax, lateral view 34 head, ventral view 35 forewing 35 male genitalia, lateral view 37 anal segment, dorsal view 38 genital styles, lateral view 39 capitulum of genital styles, ventral view 40 phallobase and aedeagus, lateral view 41 phallobase and aedeagus, ventral view. Scale bars: 0.5 mm. Abbreviations: a, finger-like cystiform process; b, curved rod-like process; c, short hooked process.

Figures 42 - 50. Female genitalia. Sinonissus hamulatus Chang & Chen, sp. nov. 42 dorsal view 43 lateral view 44 ventral view 45 anal segment, dorsal view 46 anterior connective lamina of gonapophysis VIII, lateral view 47 posterior connective lamina of gonapophysis IX, dorsal view 48 posterior connective lamina of gonapophysis IX, lateral view 49 gonoplacs, lateral view 50 sternum VII, ventral view. Scale bars: 0.5 mm.