Lagynodes acuticornis (Kieffer, 1906)

Wang, Xu, Li, Fang, Zhao, Wen-Jing, Huang, Yi-Xin, Xiang, Chun-Hui, Chen, Hua-Yan & Zhu, Chao-Dong, 2025, Five new species and three new country records of Megaspilidae from Xizang Autonomous Region, China (Hymenoptera, Ceraphronoidea), ZooKeys 1260, pp. 279-312 : 279-312

Lagynodes acuticornis (Kieffer, 1906)

Fig. 15

Plastomicrops acuticornis Kieffer, 1906: 145 .

Lagynodes rautheri Wolff, 1918: 593 .

Plastomicrops unicolor : Szelényi, 1936: 63.

Lagynodes acuticornis : Dessart, 1966: 37.

Lagynodes ( Plastomicrops) acuticornis : Dessart, 1979: 262.

Material examined. •

2 ♀♀ ( AHNU), China: Xizang, Jilong, Rikaze , 21 Feb. – 20 May. 2021, D. Wu leg., XZ-10 , XZS-11 .

Diagnosis.

This species can be separated from other Lagynodes species by the following characters: F 9 acutely pointed distally, F 9 longest. F 2 shortest; antennae setae short; head trapezoidal in anterior view, facial pit absent, facial sulcus absent. Preoccipital furrow absent; anterior preoccipital carina absent, scrobes absent, intertorular carina present, median process on intertorular carina absent; head with dense hairs; neck short; pronotum cylindrical, posterior margin concave; metamesosoma almost absent.

Description.

Female. Body length: 0.8–0.9 mm.

Coloration (Fig. 15 C ). Head, mesosoma, and metasoma brown. Antennae brown. Mouthparts brown; eyes black. Legs brown. Body pubescence white.

Antennae (Fig. 15 C ). Scape ~ 6 × longer than wide, pedicel small and almost droplet-shaped, F 9 terminal sharp. Female scape length vs pedicel length: 3.6–3.7. Scape length vs F 1 length: 2.5–2.6. F 1 length vs F 2 length: 1.0–1.2. F 9 longest. F 2 shortest. Setae short.

Head (Fig. 15 A, D ). Head width longer than mesosoma width, head width vs mesosoma width 1.1–1.2. HH: HL = 0.7–0.8. HW: IOS = 1.4–1.5. HW: HH = 1.3–1.4. Ocellar absent. Head trapezoidal in anterior view. Facial pit absent. Preoccipital lunula absent. Preoccipital furrow absent. Preoccipital carina absent. Scrobes absent. Intertorular carina present. Median process on intertorular carina absent. Head with dense hairs.

Mesosoma (Fig. 15 A ). Mesosoma narrow, 1.2 × longer than wide; length / width / height = 230 / 180 / 130 µm; densely pubescent, alutaceous in sculpture; neck short; pronotum cylindrical, posterior margin concave; metamesosoma almost absent.

Wings. Absent.

Metasoma (Fig. 15 B ). Metasoma 1.6 × longer than wide; length / width / height = 470 / 300 / 190 µm. Syntergum smooth, reaching 2 / 3 of metasomal. Syntergum with five distinct gastral carinae, reaching 2 / 5 of syntergum length. Syntergal translucent patch absent.

Distribution.

China ( Xizang) – new record to China, Belgium, Canada, Finland, France, Germany, Mexico, Italy, Switzerland, Sweden, Turkey, United States, Ukraine.

Remarks.

This species is similar to L. occipitalis Kieffer, 1906 , but can be distinguished by the length of preoccipital and eyes. Lagynodes occipitalis has a preoccipital> 2 × as long as the eyes; the metanotum and head are smooth. Lagynodes acuticornis has a preoccipital <2 × as long as the eyes; the metanotum is rough.

Figures

Figure 15. Lagynodes acuticornis (Kieffer, 1906), female. A. Dorsal habitus; B. Metasoma, dorsal view; C. Lateral habitus; D. Head, anterior view.