Dilacreon (Eluzalmon) erectus Chen & Zhi 2023, sp. nov.

Dilacreon (Eluzalmon) erectus sp. nov.

(Figs 16‒18)

Description. Body length: male 5.5 mm (n = 1), female 6.0 mm (n = 1).

Coloration. General color yellowish brown (Fig. 16A–E). Eyes brown, ocelli light yellow, semitransparent. Vertex generally yellowish brown with carinae lighter. Face generally yellowish brown; rostrum light brown. Pronotum with discal areas and mesonotum with area between lateral carinae yellowish brown, lateral areas brown. Forewing yellowish brown, semi-translucent, with the ventral margin yellowish white, outer margin dark brown, and small long light brown spots between the ends of longitudinal veins; stigma dark brown. Hind tibiae yellowish brown and abdominal sternites dark brown.

Head and thorax. Vertex (Figs 16C, 17A) broad, 2.3 times wider than long; anterior margin truncated, posterior margin archedly recessed. Frons (Figs 16D, 17B) widest slightly below the level of antennae, 1.1 times as long as wide; frontoclypeal suture nearly concave into an arch; middle carina complete; lateral carinae distinct and slightly elevated. Pronotum (Figs 16C, 17A) 2.6 times longer than vertex; median carina indistinct, posterior margin nearly at right angle. Mesonotum 1.7 times longer than pronotum and vertex combined. Forewing (Fig. 17C) 2.4 times longer than wide, with 10 apical and 6 subapical cells; fork Sc+RP basad of fork CuA 1 +CuA 2, first crossvein r-m slightly basad of fork MP, RP two branches, MP with five terminals: MP 11, MP 12, MP 2, MP 3, and MP 4, fork MP 1 +MP 2 basad of fork MP 3 +MP 4. Metatibiotarsal formula: 6/6/8, second segment of hind tarsus with three platellae.

Male genitalia. Pygofer (Fig. 17D, E) symmetrical, dorsal margin concave and U-shaped in ventral view; in lateral view, lateral lobes triangularly extended caudally, medioventral process triangular in ventral view. Anal segment (Fig. 17D, F) tubular, dorsal margin almost straight, apical half of ventral margin slightly convex, apical lobes finger-like in lateral view; 1.7 times longer than wide in dorsal view; anal style strap-shaped, not beyond anal segment. Gonostyli (Fig. 17D, E, G) symmetrical in ventral view; in inner lateral view, base of ventral margin slightly concave, dorsal margin bending inwards in a right-angle arc in the middle, apical part extended, apical margin round. Aedeagus (Fig. 17H–K) with total of four processes. On right side, base of periandrium with a longest spinous process, basal half straight and apical half slightly curved, apex ventrocephalically directed; basal half of ventral margin with 1 broad triangular spinous process, densely covered with denticles, apex ventrocaudally directed. Endosoma (=flagellum) moderately sclerotised, relatively long, generally curved dorsally. Base with a short spinous process, basal part slight broad, erect, apex dorsally directed; left side with a slender spinous process in the middle, slightly curved and ventrocephalically directed.

Female genitalia. Tergite IX (Fig. 18A, D) moderately sclerotised, with length almost equal to width in caudal view. Anal tube (Fig. 18A, C) short, nearly rectangular, 1.1 times longer than wide in dorsal view; dorsal and ventral margins nearly straight in lateral view, anal styles strap-shaped. Gonapophysis VIII (Fig. 18E) elongate, and slightly curved upwards. Gonapophysis IX (Fig. 18F) with one middle tooth, at a distance ratio, between middle tooth to apex and length of denticulate portion, of 1.8. Gonoplac (Fig. 18G) rod-like, 3.8 times longer than wide. Posterior vagina (Fig. 18H, I) elongate. The sclerites located only at the base. One nearly oval sclerite on the left and right sides of the ventral wall; two bean-shaped sclerites in the middle of the dorsal wall, and the larger one on the right; four small near-circular sclerites at the right base, arranged in an oblique row.

Type material. Holotype: ♂, CHINA: Gulinqing Town (22°48’N, 103°57’E), Maguan County, Yunnan Province, 1 June 2016, leg. Ying-Jian Wang; paratype: 1♀, same data as holotype.

Host plant. Unknown.

Distribution. China (Yunnan).

Remarks. Male genitalia of D. (E.) erectus sp. nov. are similar to those of D. (E.) salma Fennah, 1980, but differ in: (1) the dorsal base of endosoma with an erect spinous process (the latter without erect spinous process in the same position); (2) dorsal margin of periandrium without spinous process (the latter with two small spinous processes on dorsal margin of periandrium); (3) the apex of endosoma without spinous process (the apex of endosoma with a spinous process in D. (E.) salma).

Etymology. The specific name refers to the base of endosoma with a short erect spinous process.