Bambusiphaga yingjiangensis, Hong-Xing, Li, Yang, Lin & Chen, Xiang-Sheng, 2018

Hong-Xing, Li, Yang, Lin & Chen, Xiang-Sheng, 2018, Two new species of the bamboo-feeding planthopper genus Bambusiphaga Huang & Ding from China (Hemiptera, Fulgoromorpha, Delphacidae), ZooKeys 735, pp. 83-96 : 87-89

Bambusiphaga yingjiangensis sp. n. Figs 1-9, 10-21

Type material.

Holotype: ♂, China: Yunnan Province, Yingjiang County (97°56'E, 24°41'N), on bamboo, 17 Aug. 2015, X.-S. Chen and L. Yang; paratypes, 5♂♂, 23♀♀, same data as holotype.

Etymology.

This new species is named after the type locality, Yingjiang, Yunnan Province in China.

Measurements.

Body length (from apex of vertex to tip of forewings): male 3.2-3.4 mm (N = 6); female 3.6-3.9 mm (N = 23); forewings length: male 2.5-2.7 mm (N = 6); female 3.2-3.5 mm (N = 23).

Diagnosis.

The salient features of the new species include the following: pronotum and mesonotum with blackish brown markings (Figs 3-4); forewings with a large irregular pale brown stripe along transverse vein hence bending along posterior margin to apex (Fig. 8); aedeagus with phallobase, apical 1/4 with three branches (Figs 17-18); genital styles with apical forked (Figs 15-16).

Description.

Coloration. General color light yellow with dark brown markings (Figs 1-2). Vertex, frons, genae, clypeus and antennae light yellow (Figs 1-7). Eyes reddish brown, ocelli red (Figs 5, 7). Pronotum (Figs 3-4) light yellow to yellowish white, outside of each lateral carina with a large dark brown marking. Mesonotum (Figs 3-4) light yellow, outside of each lateral carina with two large dark brown markings, middle area with two small bilateral dark brown markings at apical 1/3, the scutellum with apex dark brown. Forewings (Fig. 8) hyaline, with a large irregular pale brown stripe along transverse vein hence bending along posterior margin to apex, another large pale brown transverse marking from vein Rs+M1 to apex of vein Sc2. Hindwings (Fig. 9) with a pale brown longitudinal stripe along apical margin.

Head and thorax. Vertex with anterior margin broadly rounded, lateral and submedian carinae distinct, ratio width at base to width at apex 1.4, ratio of length to width at base 0.5 (Figs 3-4). Frons with ratio of length at midline to width at widest part 2.2, widest at apex, median carina forked at base (Figs 5-6). Base of postclypeus as wide apex of frons (Figs 5-6). Antennae with basal segment long equal to wide, shorter than second segment (0.4: 1), two segments together reaching to frontoclypeal suture (Figs 5-6). Pronotum with ratio length in midline to length of vertex 1.7 (Figs 3-4). Mesonotum 2.5 times as long as vertex and pronotum combined in middle line (Figs 3-4). Forewings (Fig. 8) longer in middle line than broad at widest part (2.6: 1), apical margin rounded.

Male genitalia. Pygofer (Figs 12-13) without medioventral process, opening longer than wide in posterior view (Fig. 12), dorsal margin shorter than ventral margin in lateral view (Fig. 13). Aedeagus (Figs 17-18) with phallobase process small and simple, arising from base of aedeagus, with basal 1/2 thick, apical 1/2 thin, S-shaped; phallus complex, apical 1/4 with three branches-the left one curved, directed basad, the middle one small and straight, and the right one, longest slightly curved and directed ventrad; gonopore located at apical 1/4 of phallus, node-like. Genital styles (Figs 15-16) long, with two processes forked at apical 1/3 (Fig. 16), with apex in profile triangular, a large tooth-like located at middle of subapex, directed basad (Fig. 15). Anal segment (Figs 10-11) short, ring-like, without processes, ventral margin convex medially in posterior view (Fig. 11).

Female genitalia. Female pygofer (Fig. 19) with gonocoxa VIII moderately large. Ovipositor (Fig. 19) overpassing the pygofer. Gonangulum large, apex blunt, connected gonocoxa VIII. Gonapophyses IX (Fig. 21) curved basally, straight and narrowing apically, dorsal margin with apical 1/2 serrated, ventral margin with three small teeth near the tip.

Host plant.

Bamboo.

Distribution.

Southwest China (Yunnan) (Fig. 40).

Remarks.

This new species resembles B. nigropunctata Huang & Ding, 1979, but differs from the latter by: lateral areas of pronotum and mesonotum with several dark brown markings (without dark brown marking in nigropunctata ); genital styles forked apically (genital styles not forked apically in nigropunctata ); aedeagus with three branches subapically (aedeagus with two branches apically in nigropunctata ).

This new species is also similar to B. taiwanensis (Muir, 1917) and can be distinguished by: lateral areas of pronotum and mesonotum with several dark brown markings (without dark brown marking in taiwanensis ); genital styles forked apically (genital styles not forked apically in taiwanensis ); aedeagus with three branches without tooth (aedeagus with several small teeth on dorsal and lateral sides of the main branch in taiwanensis ).

Based on the characters of male genitalia, this species should belong to the nigropunctata group.