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A new fossil species of   Eulophidae  ,    Kressleinius   celans   ,  gen. et sp. nov. , is described from Eocene Baltic amber. It does not place into any extant genera within   Eulophidae   due to a lack of distinctive synapomorphies. The results of a morphology-based phylogenetic analysis placed    K.   celans    in   Tetrastichinae   because of features shared with several genera, including having 6 flagellomeres past the anelli, admarginal setae short, propleura diverging, and a newly described feature of the transepimeral sulcus. This represents the oldest known fossil for the largest family of   Chalcidoidea   in terms of described species.

Patching up the past one fossil at a time: A new genus and species of Eulophidae from Eocene Baltic Amber ( Hymenoptera , Chalcidoidea )