Cecidostiba is a genus of parasitoid wasps in the tribe Pteromalini. All species in the genus are parasitoids of gall wasps (Cynipidae) on Quercus, Castanea and Acer.
As of 2025, there are 9 described species in the genus.
Species in the genus are parasitoids of gall wasps (Cynipidae) on Quercus, Castanea and Acer, along with other similar genera in the same tribe.
This genus can be distinguished from other similar genera such as Hobbya and Caenacis based on the presence of punctures on the .
This genus contains the following species: