Gnathochorisis leleji Humala, 2021

Varga, Oleksandr, 2025, First records of the genera Gnathochorisis Förster, 1869 and Symplecis Förster, 1869 (Hymenoptera, Ichneumonidae, Orthocentrinae) from Vietnam, Zootaxa 5647 (6), pp. 571-583 : 573-574

Gnathochorisis leleji Humala, 2021

( Fig. 2 )

Material examined. 1 ♀, VIETNAM: Viet Try, nr Thanh Son, Thuong Cuu , 20°59’N, 105°8’N, 350–400 m, Malaise traps, 11–16.x.1999, leg. R . de Vries , RMHN’99, RMNH .INS.1722321 ( RMNH); 1 ♀, Dak Lak, Chu Yang Sin N.P., Krong K’Mar , 740–900 m, Malaise traps, 02–10.vi.2007, leg. C. v. Achterberg & R . de Vries , RMHN’07, RMNH . INS.1722322 ( RMNH).

Diagnosis (based on Vietnamese specimens). Gnathochorisis leleji is characterized by the combination of the following characters: face brown to black, clypeus yellow; antenna with 22 flagellomere, first flagellomere 4.3–4.4 × as long as wide ( Fig. 2B ); mesosoma black; metapleuron largely smooth ( Fig. 2A ); propodeum with area superomedia transverse, 0.6 × as long as wide; fore wing with vein 3rs-m absent; second tergite smooth and longitudinally wrinkled, 0.8–0.9 × as long as apical width; ovipositor 0.8 × as long as hind tibia and 1.0 × as long as first tergite ( Fig. 2A ).

Remark. Vietnamese specimens of Gnathochorisis leleji are generally similar to those described from Malaysia, but differ by the slightly wider area superomedia of the propodeum and longer ovipositor, however both characters seem to be variable. Additional female specimen examined (but not listed in the material section) has somewhat shorter first flagellomere (4.0 × as long as wide), more rugulose posteriorly metapleuron ( Fig. 2C ) and second tergite of metasoma narrowly banded with yellow apically ( Fig. 2D ). The taxonomic status of this specimen remains uncertain until more similar specimens be examined.

Distribution. Malaysia ( Humala 2021), first record from Vietnam.

Figures

FIGURE 2. Gnathochorisis spp., female. A–B—G. leleji; C–D—? G. leleji; A–С—lateral view of habitus; B—frontal view of face; D—dorsal view of metasomal tergites 1–2. Scale bars: 0.5 mm (A, C) and 0.1 mm (B, D).