Scolebythidae are a family within the Chrysidoidea characterized by their peculiar structure of the mesosoma, with the propleura exposed dorsally and the protrochanters inserted laterally on the procoxae. The family is represented by only nine extant species, which are found in tropical and subtropical forests around the world. Some of these species show evidence of an idiobiont ectoparasitoidism behavior on wood-boring beetle larvae of the families Cerambycidae and Ptinidae. Here, we describe Pachycephalopenesia eximia n. gen. n. sp. from the Early Cretaceous (Barremian) amber-bearing outcrop of Beqaa Kafra, in North Lebanon. This new genus is characterized by the presence of a striking protuberance on the frons between the compound eyes and extending from the antennal sockets to the ocelli, which is unique in the family so far. This finding proves that the morphological disparity in Scolebythidae is higher than previously thought. An updated checklist of the fossil scolebythid species and a key to the species from the Lebanese amber are included. (c) 2025 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. All rights are reserved, including those for text and data mining, AI training, and similar technologies.