Diachasmimorpha is a genus of the Opiinae subfamily of braconid parasitoid wasps and was first described in 1913. It is a small genus relatively restricted to the subtropics but also includes species in the Nearctic and northern Neotropical Regions. The genus is most clearly defined by an apical sinuate ovipositor, which is a synapomorphic character and defines a monophyletic lineage.

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