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Revision of the Orasema festiva species group (Hymenoptera: Chalcidoidea: Eucharitidae)

Roger A. Burks, Jason Mottern, John M. Heraty


The Neotropical Orasema festiva species group is revised, retaining O. festiva (Fabricius) and O. delicatula (Walker) as valid species, and describing four new species: O. alvarengai n. sp., O. caesariata n. sp., O. erwini n. sp., and O. reburra n. sp. The festiva-group is characterized by features that are unusual or unique in Orasema, including the presence of 8–11 labral digits, a smooth face, and a lateral petiolar carina. The egg of O. caesariata and the first-instar larva of O. delicatula are newly described and found to be similar to other species of Orasema.


parasitoid, Neotropical, Formicidae, Hymenoptera

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