Universal Chalcidoidea Database

Distribution references

Records of Pteromalus cioni (Thomson, 1878) in Bulgaria:

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Markova, G. 1997, Biotic factors affecting Steronychus fraxini Deg. (Coleoptera: Curculionidae) populations in Longoza forest. Acta Entomologica Bulgarica 3(3/4):89-92    
Tsankov, G.; Markova, G. 1992, Parasitoids of Steronychus fraxini De Geer in Longoza Forest. Nauka za Gorata 29:56-61