Malaxa chongzuoensis Lv & Chen, 2025

Malaxa chongzuoensis Lv & Chen sp. nov.

Figs 2 View Figures 2–5 , 3 View Figures 2–5 , 6–15 View Figures 6–15 , 26 View Figure 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 GoogleMaps . Paratypes: China • 1 ♂, 4 ♀♀; same collection data as for holotype; IEGU GoogleMaps .

Diagnosis.

The salient features of the new species include: vertex (Figs 2 View Figures 2–5 , 6 View Figures 6–15 ) with apical half brownish-black; frons and genae (Figs 3 View Figures 2–5 , 8 View Figures 6–15 ) black; mesonotum (Figs 2 View Figures 2–5 , 6 View Figures 6–15 ) blackish-brown at middle, rest tawny to reddish-brown; forewings (Fig. 7 View Figures 6–15 ) with a reversed hyaline V-shaped marking; pygofer (Fig. 15 View Figures 6–15 ) in ventral view medioventral processes asymmetrical; outer process of gonostyles (Fig. 12 View Figures 6–15 ) snakelike in lateral view; dorsal margin of phallobase (Fig. 11 View Figures 6–15 ) 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 View Figures 2–5 , 3 View Figures 2–5 ). Vertex (Figs 2 View Figures 2–5 , 6 View Figures 6–15 ) with apical half brownish-black, basal half yellowish-brown. Frons (Fig. 8 View Figures 6–15 ) and genae (Figs 3 View Figures 2–5 , 8 View Figures 6–15 ) black. Clypeus (Fig. 8 View Figures 6–15 ) with basal half brownish-black. Eyes (Figs 6 View Figures 6–15 , 8 View Figures 6–15 ) reddish-brown. Pronotum (Figs 2 View Figures 2–5 , 6 View Figures 6–15 ) brown to black except lateral sides yellow. Mesonotum (Figs 2 View Figures 2–5 , 6 View Figures 6–15 ) blackish-brown at middle, rest tawny to reddish-brown. Outer part of tegulae (Figs 2 View Figures 2–5 , 6 View Figures 6–15 ) black brown, inner part yellowish-white. Forewings (Fig. 7 View Figures 6–15 ) 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 View Figures 6–15 ) 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 View Figures 6–15 ) longer in middle line than wide at widest portion (about 1.28: 1), widest at apex, median carina simple. Postclypeus (Fig. 8 View Figures 6–15 ) wide at base as wide as frons at apex. Antennae (Figs 6 View Figures 6–15 , 8 View Figures 6–15 ) very long, cylindrical, surpassing apex of clypeus, scape longer than wide, shorter than pedicel (0.46: 1). Pronotum (Fig. 6 View Figures 6–15 ) with lateral carinae not attaining hind margin, longer than vertex in midline (0.75: 1). Mesonotum (Fig. 6 View Figures 6–15 ) with lateral carinae not attaining hind margin, longer than 1.67 times pronotum and vertex combined. Forewings (Fig. 7 View Figures 6–15 ) slender, longer than maximal width (3.02: 1).

Male genitalia. Pygofer in lateral view (Fig. 9 View Figures 6–15 ) ventral margin longer than dorsal margin, in posterior view (Fig. 10 View Figures 6–15 ) with opening longer than wide, in ventral view (Fig. 15 View Figures 6–15 ) medioventral processes asymmetrical, concave medially, left process shorter. Gonostyles (Figs 12 View Figures 6–15 , 13 View Figures 6–15 ) 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 View Figures 6–15 ) 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 View Figures 6–15 , 14 View Figures 6–15 ) small, ring-like.

Host plant.

Indocalamus tessellatus (Munro) P. C. Keng ( Poales : Poaceae : Bambusoideae) (Fig. 26 View Figure 26 ).

Distribution.

China (Guangxi) (Fig. 1 View Figure 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 View Figures 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 ).