Symplecis, Forster, 1869

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 : 575

Key to females of the Oriental species of Symplecis

1. Second tergite and anterior 0.8 of third tergite of metasoma granulate and mat ( Fig. 3H ). Face dark contrasting with yellow clypeus ( Fig. 3B )..................................................................... S. granulosus sp. nov.

- Second tergite of metasoma longitudinally wrinkled and shiny; third tergite unsculptured ( Figs 4H ,). Face and clypeus concolor, yellow to dark brown ( Figs 4B , 5B , 6B ).................................................................... 2

2. First flagellomere 7.5 × as long as wide. Hind wing with nervellus intercepted. Face and mesopleuron reddish brown................................................................................................. S. petiolata

- First flagellomere at most 6.3 × as long as wide ( Fig. 4G ) and then mesopleuron black ( Fig. 4D ) and hind wing with nervellus not intercepted ( Fig. 4F )................................................................................. 3

3. Face, clypeus and pronotum yellow ( Figs 6B, E ). Mesoscutum evenly pubescent ( Fig. 6G ). Propodeum with area superomedia enclosed by the carinae ( Fig. 6H )......................................................................... 4

- Face and clypeus dark brown to black ( Figs 4B , 5B ). Pronotum orange ( Figs 4D , 5D ). Mesoscutum partly to entirely glabrous ( Figs 4C , 5E ). Propodeum with area superomedia not enclosed by the carinae ( Figs 4E , 5F ).......................... 5

4. Mesopleuron and partly mesoscutum orange. Propodeum with area superomedia about as long as wide. Hind wing with nervellus not intercepted................................................................. S. anaeratabettensis

- Mesopleuron and mesoscutum black ( Figs 6E, G ). Propodeum with area superomedia 1.2–1.3 × as long as wide ( Fig. 6H ). Hind wing with nervellus intercepted ( Fig. 6I )................................................. S. vietnamensis sp. nov.

5. Mesoscutum pubescent centrally, glabrous laterally ( Fig. 4C )................................. S. hoangliensis sp. nov.

- Mesoscutum largely glabrous except of the anterior margin ( Fig. 5E )................................ S. nudus sp. nov.

Figures

FIGURE 3. Symplecis granulosus sp. nov., holotype female. A—lateral view of habitus; B—frontal view of face; C—dorsal view of head and mesoscutum; D—lateral view of head and mesosoma; E—dorsal view of propodeum; F—lateral view of wings; G—frontal view of flagellomeres 1–2; H—dorsal view of metasomal tergites 1–3. Scale bars: 0.5 mm (A) and 0.1 mm (B–H).

FIGURE 4. Symplecis hoangliensis sp. nov., holotype female. A—lateral view of habitus; B—frontal view of face; C—dorsal view of head and mesoscutum; D—lateral view of head and mesosoma; E—dorsal view of propodeum; F—lateral view of wings; G—frontal view of flagellomeres 1–2; H—dorsal view of metasomal tergites 1–3. Scale bars: 0.5 mm (A) and 0.1 mm (B–H).

FIGURE 5. Symplecis nudus sp. nov., holotype female. A—lateral view of habitus; B—frontal view of face; C—dorsal view of head; D—lateral view of head and mesosoma; E—dorsal view of mesoscutum; F—dorsal view of propodeum; G—lateral view of wings; H—frontal view of flagellomeres 1–2; I—dorsal view of metasomal tergites 1–3. Scale bars: 0.5 mm (A) and 0.1 mm (B–I).

FIGURE 6. Symplecis vietnamensis sp. nov. A–B, E–G, I–K—holotype female; H—paratype female; C–D—paratype male. A, D—lateral view of habitus; B–C—frontal view of face; E—lateral view of head and mesosoma; F—dorsal view of head; G—dorsal view of mesoscutum; H—dorsal view of propodeum; I—lateral view of wings; J—frontal view of flagellomeres 1–2; K—dorsal view of metasomal tergites 1–3. Scale bars: 0.5 mm (A, D) and 0.1 mm (B–C, E–K).