Sigalphinae, Haliday, 1833

Belokobylskij, Sergey A., Achterberg, Cornelis Van & Manukyan, Andranik R., 2025, New fossil genus and species from the subfamily Sigalphinae (Hymenoptera: Braconidae) in Eocene Baltic amber with remarks on the genus Acampsohelcon Tobias, 1987, Zootaxa 5722 (1), pp. 124-134 : 133

Key to the tribes and subtribes of the subfamily Sigalphinae

1. Metasoma attached to propodeum much higher than base of hind coxa ( Figs 4A, B ); propodeal bridge, sclerite separating the metasomal and coxal foramens on propodeum, present. Second radiomedial (submarginal) cell of fore wing short and relatively small ( Fig. 4G ). Discoidal (discal) cell of fore wing short and wide ( Fig. 4G ). Fossil (Baltic amber) ….. Acampsohelconini

– Metasoma attached to propodeum near level of base of hind coxa; propodeal bridge absent. Second radiomedial (submarginal) cell of fore wing long and relatively large. Discoidal (discal) cell of fore wing relatively long and narrow............... 2

2. Third metasomal tergite closed posteriorly and distinctly longer than second tergite. Second tergite deeply impressed anteriorly. Second and third tergites forming carapace covering posterior segments. Afrotropical, Nearctic, Oriental and Palaearctic regions.......................................................................... Sigalphini (Sigalphina)

– Third metasomal tergite open posteriorly, and medially not or only slightly longer than second tergite. Second tergite anteriorly at most with a pair of shallow depressions. Second and third tergites variable (forming or not forming carapace, and covering or not covering posterior segments)....................................................................... 4

Figures

FIGURE 4. Acampsohelcon rasnitzini Tobias, 1987 (female, holotype, PIN # 964/1239). (A) Body, left view. (B) Body, right view. (C) Head, dorso-anterior view. (D) Body, subdorsal view. (E) Head and mesosoma, dorsal view. (F) Head and mesosoma, lateral view. (G) Hind tarsus (H) Fore tarsus (I) Fore wing. (J) Metasoma and ovipositor, lateral view.