A new genus and species of orussoid wasps, Cretorussus vilhelmseni gen. et sp. nov., is described based on new material from the mid-Cretaceous Burmese amber. Its wing venation and body characters lead us to emend the diagnosis of the family Burmorussidae. Cretorussus vilhelmseni gen. et sp. nov. is considered to be a specialized parasitic wasp of wood-living hosts because of the orussid-like ocellar crown, antennae attached well above clypeus, and antennal grooves absent. Interestingly, the third tarsomere carries a prominent lanceolate lobe, serving as part of the host detection. We propose a summary of the orussoid fossil diversity. Lastly, we discuss the implications of several characters of Burmorussidae that are involved in host detection.

一个新的属和种 orussoid 黄蜂，Cretorussus vilhelmseni gen。等 sp. 11 月，根据来自中白垩世缅甸琥珀的新材料进行描述。它的翅脉和身体特征使我们修正了对 Burmorussidae 科的诊断。Cretorussus vilhelmseni gen。等 sp. 十一月 被认为是木生活宿主的一种特殊寄生蜂，因为它有类似 orussid 的眼孔冠，触角附着在 clypeus 上方，并且没有触角凹槽。有趣的是，第三个 tarsomere 带有突出的披针形叶，作为宿主检测的一部分。我们提出了一个关于 orussoid 化石多样性的总结。最后，我们讨论了参与宿主检测的 Burmorussidae 的几个特征的含义。