Taxonomic additions to the genus †Megacoxa Brazidec et al., 2024 (Hymenoptera: Megalyridae) from Kachin amber

The extinct genus Megacoxa was recently described from Kachin amber and currently includes six formally recognized species. Despite the recent addition of three new species, additional, yet-undescribed specimens continue to be discovered in both institutional and private collections, awaiting formal description. The vast quantity of material extracted from the Kachin biota provides a practically inexhaustible source of new species. As with many insect families preserved in mid-Cretaceous Kachin amber, the diversity and number of megalyrid wasps remain significantly underestimated. In this study, I illustrate a new specimen of Megacoxa chandrahrasa Brazidec et al., 2024. I also describe a new species, Megacoxa miscea sp. nov., which exhibits a combination of characters found in M. janzeni and M. synchrotron. Furthermore, I present an updated identification key for Megacoxa species, incorporating this newly described species.