Irenangelus is a genus of kleptoparasitic spider wasps in the subfamily Ceropalinae of the family Pompilidae.

[3] Irenangelus is closely related to the more widespread genus Ceropales, with both forming a monophyletic subfamily, Ceropalinae, within the Pompilidae.

Current research suggests that Ceropalinae and other pompilids evolved from a common ectoparasitoid ancestor.

The kleptoparasitic behavior of I. lukosanus has been observed as it pursues its host pompilid, Platydialepis ryoheii, while the latter transports its prey, Heteropoda forcipata, to its nest.

The kleptoparasitic wasp pounces on the spider and extends its gaster, attempting to insert the tip into a slit of the prey's book lung.