Neohemisphaerius clavatus 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 : 36-40

Neohemisphaerius clavatus Yang & Chen sp. nov. Figs 3, 4, 20-35, 36

Type material.

Holotype: ♂, China: Guizhou, Duyun, Doupengshan (107°07'E, 25°51'N), L.-J. Yang, 19 August 2017; paratypes 2♂♂, same data as holotype; 3♂♂, same data as holotype except J.-K. Long, 8 August 2016. GUGC and one paratype in BMNH.

Description.

Male body length: 4.53-4.76 mm (n = 5); male forewings 4.23-4.38 mm (n = 5); male hindwing 1.17-1.42 (n = 5).

Coloration (Figs 3, 4, 20-22). Head fulvous, margins of vertex and frons brown (Figs 20, 22). Clypeus with dark brown strip on each side of median carinae (Figs 21, 22). Rostrum brown (Figs 21, 22). Eyes dark brown, antennae brown (Fig. 21). Pronotum and mesonotum yellow brown, mesonotum with anterior margin dark brown in the middle (Fig. 20). Forewings yellowish and slightly pellucid, with three dark brown irregular stripes subparallel, slanted caudad, venation mostly fulvous (Figs 3, 4). Hindwing brownish hyaline. Legs brown. Abdomen yellowish.

Head and thorax (Figs 5-9). Vertex longer in middle than maximal width (0.37:1.00), quadrangular, anterior margin nearly straight, posterior margin angularly concave, margins elevated (Fig. 20). Frons rough, basally narrow, longer than maximal width in basal third (1.45:1.00), with median carinae, margins elevated (Figs 21-22). Clypeus with median carinae moderately convex, arcuate in lateral view (Figs 21-22). Pronotum longer than vertex in midline (1.63:1.00), slightly depressed, without carinae and pustules (Fig. 20). Mesonotum subtriangular, about 3 times longer than pronotum, anterior margin approximately straight (Fig. 20). Forewings about 1.70 times longer than maximal width, with claval suture developed through its whole, venation obscurely reticulate (Figs 3, 23). Hindwings rudimentary, shorter than half length of forewing, venation simple (Fig. 24). Hind tibiae with 2 lateral teeth. Metatibiotarsal formula of hind leg: 10 –4– 2.

Male genitalia (Figs 25-35). Anal tube pyriform, midline longer than broad (in dorsal view) (Fig. 25). Pygofer nearly rectangular (in lateral view), narrow, anterior and posterior margin subparallel (Fig. 27). Genital styles subtriangular (in lateral view), dorsal margin with triangular process, disc with fingerlike process below capitulum (Fig. 28). Capitulum with subapical tooth and lateral tooth (Figs 28, 29). Connective short and thick (Fig. 30). Phallobase asymmetrical, with process clavate, arched in basal third (in lateral view), directed basad, H-shaped (in dorsal view) (Figs 31, 32, 34a), process apically and phallobase basally with transparently membranous process with pair of strong hooks directed caudad (Figs 31-34b, c). Ventral lobe with pair of hooks asymmetrical in apical third, directed cephalad (Figs 31-34h, i); Lateral lobe bifurcate. Dorsal lobe with apical margin slightly notched medially (in dorsal view), with four differently sheet-shaped subapical processes (Figs 34-35d, e, f, g), the smallest near the left middle (Figs 34, 35g), with a short carinae left dorsally near its middle (Fig. 35j).

Etymology.

The name of new species is derived from the Latin words “clavate”, referring to the club-shaped process of the aedeagus in basal third (in lateral view).

Host plant.

Bambusa emeiensis .

Distribution.

Southwestern China (Guizhou).

Remarks.

This species resembles N. wugangensis , N. yangi and N. guangxiensis , but can be distinguished by the following characteristics: Frons rough (Fig. 22), disc flat, slightly depressed; clypeus with median carinae without a tubercles process in middle (Fig. 22); forewings yellowish brown, with three dark stripes subparallel (Figs 3, 4); anal tube with apical margin concave medially (in dorsal view) (Fig. 25); Phallobase asymmetrical, with process clavate in basal third (in lateral view), process directed basad, H-shaped (in dorsal view) (Figs 31, 32a, 34a).