Abstract
An enigmatic chalcid wasp (Hymenoptera: Chalcidoidea) from Chile is described as a new genus and species, Lautaroderus malalcahuello gen. et sp. n. The taxon is classified in the family Eulophidae based on possession of a short, straight calcar and 4-segmented tarsi of female. However, a densely setose basal cell of fore wing, X-shaped pattern of facial grooves, and an incurved anterior margin of the clypeus are similar to representatives of the subfamily Tetracampinae of Tetracampidae. Although L. malalcahuello does not fit readily in the current concept of Eulophidae, it is assigned to this family though not further placed to subfamily or tribe. The proposed classification and possible relationships of the new taxon are discussed.
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