Malaxa chongzuoensis Lv & Chen 2025, sp. nov.
Creators: name: Lv, Sha-Sha
name: Li, Hong-Xing
name: Yang, Lin
name: Zhang, Yu-Bo
name: Chen, Xiang-Sheng
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Delphacidae
Malaxa
Malaxa chongzuoensis

description: Malaxa chongzuoensis Lv & Chen sp. nov.
Figs 2, 3, 6–15, 26
Type material.
Holotype: China • ♂; Guangxi Zhuang Autonomous Region, Chongzuo City, Longzhou County, Zhubu Township, Nonggang Village; 22 ° 39 ' N, 106 ° 57 ' E; sweeping, 16 August 2024; Sha-Sha Lv and Xiang-Sheng Chen leg.; IEGU. Paratypes: China • 1 ♂, 4 ♀♀; same collection data as for holotype; IEGU.
Diagnosis.
The salient features of the new species include: vertex (Figs 2, 6) with apical half brownish-black; frons and genae (Figs 3, 8) black; mesonotum (Figs 2, 6) blackish-brown at middle, rest tawny to reddish-brown; forewings (Fig. 7) with a reversed hyaline V-shaped marking; pygofer (Fig. 15) in ventral view medioventral processes asymmetrical; outer process of gonostyles (Fig. 12) snakelike in lateral view; dorsal margin of phallobase (Fig. 11) with a slender horned process at apical 1 / 3.
Description.
Measurements. Total length: male 3.5–3.7 mm (N = 2), female 4.1–4.5 mm (N = 4).
Coloration. General color pale yellowish-brown (Figs 2, 3). Vertex (Figs 2, 6) with apical half brownish-black, basal half yellowish-brown. Frons (Fig. 8) and genae (Figs 3, 8) black. Clypeus (Fig. 8) with basal half brownish-black. Eyes (Figs 6, 8) reddish-brown. Pronotum (Figs 2, 6) brown to black except lateral sides yellow. Mesonotum (Figs 2, 6) blackish-brown at middle, rest tawny to reddish-brown. Outer part of tegulae (Figs 2, 6) black brown, inner part yellowish-white. Forewings (Fig. 7) greyish-white, hyaline, veins gray to light yellowish-brown, basal 1 / 4 light yellowish-brown except areas around bifurcation of Pcu and A 1, basal 1 / 4 to middle part with an arched dark brown stripe, forming a reverse hyaline V-shaped marking, along ScP, ir, RP and area between MP 1 and MP 2 dark brown.
Head and thorax. Vertex (Fig. 6) slightly longer than wide at base (1.07: 1), width at apex narrower than at base (0.83: 1), submedian carinae uniting slightly beyond middle, apex produced in front of eyes, apical margin straight, greatest length of basal compartment shorter than wide at base of vertex (0.67: 1). Frons (Fig. 8) longer in middle line than wide at widest portion (about 1.28: 1), widest at apex, median carina simple. Postclypeus (Fig. 8) wide at base as wide as frons at apex. Antennae (Figs 6, 8) very long, cylindrical, surpassing apex of clypeus, scape longer than wide, shorter than pedicel (0.46: 1). Pronotum (Fig. 6) with lateral carinae not attaining hind margin, longer than vertex in midline (0.75: 1). Mesonotum (Fig. 6) with lateral carinae not attaining hind margin, longer than 1.67 times pronotum and vertex combined. Forewings (Fig. 7) slender, longer than maximal width (3.02: 1).
Male genitalia. Pygofer in lateral view (Fig. 9) ventral margin longer than dorsal margin, in posterior view (Fig. 10) with opening longer than wide, in ventral view (Fig. 15) medioventral processes asymmetrical, concave medially, left process shorter. Gonostyles (Figs 12, 13) long, in lateral view apical half bifurcated into two processes, outer process slender and curved, snakelike, tapering to apex, inner process short and thick, rounded at apex; in posterior view C-shaped. Male genitalia (Fig. 11) with phallobase, aedeagus tubular, vaulted ventrally, tapering to apex; phallobase wide, curved ventrally, tapering to apex, dorsal margin with a slender horned process at apical 1 / 3. Anal segment (Figs 9, 14) small, ring-like.
Host plant.
Indocalamus tessellatus (Munro) P. C. Keng (Poales: Poaceae: Bambusoideae) (Fig. 26).
Distribution.
China (Guangxi) (Fig. 1).
Etymology.
The new species is named after the city in which it was collected (Chongzuo) with the Latin adjectival suffix ‘ - ensis ’ meaning ‘ from’.
Remarks.
This species (Figs 6–15) is similar to M. hamuliferum Li, Yang & Chen, 2019 (Li et al. 2019: figs 5–14), but differs from the latter in: (1) forewings with basal 1 / 2 bearing a reversed hyaline V-shaped marking (forewings with basal 1 / 2 bearing a hyaline V-shaped marking in M. hamuliferum); (2) dorsal margin of phallobase with a long horned process (dorsal margin of phallobase without a long horned process in M. hamuliferum); and (3) aedeagus shorter than phallobase (aedeagus longer than phallobase in M. hamuliferum).
description: Published as part of Lv, Sha-Sha, Li, Hong-Xing, Yang, Lin, Zhang, Yu-Bo & Chen, Xiang-Sheng, 2025, Two new species of the genus Malaxa Melichar, 1914 from China (Hemiptera, Fulgoromorpha, Delphacidae, Tropidocephalini), pp. 275-287 in ZooKeys 1229 on pages 275-287, DOI: 10.3897/zookeys.1229.143177