New evanioid wasps (Hymenoptera: Praeaulacidae, Aulacidae) from Cenomanian Burmese amber

Corentin Jouault (1) , André Nel (2) , Vincent Perrichot (1)

1 GR - Géosciences Rennes
2 ISYEB - Institut de Systématique, Evolution, Biodiversité

The Cenomanian amber from Kachin State of Myanmar contains a diversified fauna of fossil evanioid wasps. Two new genera are described and figured, as Rasnitsevania ferox gen. et sp. nov. in the family Praeaulacidae, and Electrofoenia jehani gen. et sp. nov. in Aulacidae. Characteristic features of Rasnitsevania gen. nov. include a large mesosoma, a two-segmented metasomal petiole with first segment long, trapezoidal, and the fore wing venation with a long cell 1-mcu and a cell 2rm shorter than 3rm. Electrofoenia is characterized by the pronotum transversely striate and the fore wing with vein 1Rs less than twice as long as 2Rs, 2Rs+M short, 2M longer than 3M, and 1cu-a basal to fork of 1M and 1cu. The Praeaulacidae and Aulacidae display an extensive fossil record suggesting that the Mesozoic Evanioidea were much more diverse than today. An updated list of the fossil record of the Praeaulacidae is provided.

Mots clés: Aulacidae; Evanioidea; Praeaulacidae; Hymenoptera; fossil record 24; Cenomanian

Domaines: Paléontologie

Corentin Jouault, André Nel, Vincent Perrichot. New evanioid wasps (Hymenoptera: Praeaulacidae, Aulacidae) from Cenomanian Burmese amber. Cretaceous Research, 2020, 110, pp.104407. ⟨10.1016/j.cretres.2020.104407⟩. ⟨insu-02462021⟩