Ceratogergithus brachyspinus Yang & Chen

Yang, Liang-Jing, Yang, Lin, Chang, Zhi-Min & Chen, Xiang-Sheng, 2019, Two new species of the tribe Hemisphaeriini (Hemiptera, Fulgoromorpha, Issidae) from southwestern China, ZooKeys 861, pp. 29-41 : 33

Ceratogergithus brachyspinus Yang & Chen sp. nov. Figs 1, 2, 5-18

Type material.

Holotype: ♂, China: Yunnan, Daweishan National Nature Reserve (103°20'E, 23°07'N), 8 May 2016, L.-J. Yang. Paratypes: 1♂, same data as holotype; 1♂, same data as holotype, except 19 August, 2017, Y.-J. Sui. All in GUGC.

Description.

Male body length (from apex of vertex to tip of forewing): 5.16-5.31 mm (n = 3); male forewing 4.43-4.58 mm (n = 3); male hindwing 3.30-3.47 mm (n = 3).

Coloration (Figs 1, 2, 5-7). Vertex straw-yellow to pale green, all margins brownish (Fig. 5). Frons with brick-red markings, margins brownish (Fig. 7). Clypeus dark brown. Eyes reddish brown to greenish-brown (Figs 6, 7). Pronotum straw-yellow, margins brown (Fig. 5). Mesonotum (Fig. 5) fulvous, with fuscous subtriangular marking. Forewing fulvous, with three white markings irregular, costal margin white from middle to subapical part (Figs 1, 2, 8). Hindwing brownish and hyaline.

Head and thorax (Figs 5-9). Vertex shorter in middle than width at base (0.41: 1.00), transverse, anterior margin weakly convex, posterior margin angularly concave, disc depressed and all margins elevated (Figs 1, 5). Frons longer along midline than maximal width (1.53: 1.00) (Fig. 7), smooth, without median carina or pustules, apical margin nearly straight, margins carinate, disc slightly elevated (in frontal view) (Fig. 7) and arcuate (in lateral view) (Fig. 6). Clypeus with median carina obvious, postclypeus distinctly elevated (Figs 6, 7). Ocelli absent. Pronotum longer than vertex (1.56: 1.00), slightly depressed, margins elevated (Fig. 5). Mesonotum subtriangular, longer than pronotum (3.23:1.00) (Fig. 5), without median and lateral carinae, anterior margin nearly transverse (Fig. 5). Forewings about 2 times longer than maximal width (Figs 1, 2), with claval suture developed through its whole length, without “shoulder” basally, venation obscure. Hindwing 0.70 times as long as forewings (Figs 8, 9), reaching pygofer; venation reticulate (Fig. 9). Hind tibiae with two lateral teeth. Metatibiotarsal formula: 7 –8– 2.

Male genitalia (Figs 10-19). Anal tube 1.35 times as long as wide (in dorsal view) (Fig. 10), enlarged apically, apical margin deeply notched medially, bent ventrad (in lateral view) (Fig. 11). Pygofer symmetrical, posterior margin with large horn-shaped process in apical fourth (Fig. 12). Genital style subquadrate (in lateral view), moderately long, depressed in base near ventral margin, caudo-ventral angle rounded (Fig. 12). Capitulum with neck and small lateral tooth directed cephalad and big lateral tooth on posterior margin, directed laterad (Figs 12, 13). Connective cup-shaped (Figs 14, 15). Penis twisted medially (Figs 16, 17). Phallobase asymmetrical, with basal tooth process directed caudad (Figs 16, 17a), with pair of short lateral hooks in basal third, directed basad (Figs 16, 17b, e); dorso-lateral lobes of phallobase membranous in apical two-fifth (Figs 16, 19), with two differently shaped processes of different length directed apically: one process slender and short, arising in apical fourth (Figs 16-19c), other one arising in basal third, extended ventrad, with subapical process horn-shaped (Figs 17-19d). Ventral lobe of phallobase apically convex (in ventral view), shorter than dorso-lateral lobes (Fig. 18).

Etymology.

The specific name is derived from the Latin words “brachys” and “spina”, referring to the short lateral hooks on the basal third of the phallobase.

Host plant.

Unknown.

Distribution.

Southwestern China (Yunnan).

Remarks.

This species can be distinguished from all the other species of genus Ceratogergithus by the following characteristics: Frons with brick-red markings (Fig. 7); clypeus with distinct median carina, postclypeus distinctly elevated (Figs 6, 7); forewing fulvous, with three white irregular markings, with claval suture developed, basally depressed (Figs 1, 2).