Three new genera and five new species of Cecidomyiidae are described from the earliest Eocene amber of Oise (France). The new taxa belong to the Lestremiinae, the oldest representatives of the genus Lestremia (Lestremiini), L. eocenica n. sp. and L. deploegi n. sp., Neurolyga magnifica n. sp. (Micromyini), Proacoenonia olgae n. gen., n. sp. (Acoenoniini), and to the Porricondylinae Winnertziini, Electroxylomyia eocenica n. gen., n. sp. All these taxa are closely similar to their nearest recent relatives, showing a high morphological stability in these groups, maybe related to their biotopes in decaying vegetation.
Insecta, Diptera, Cecidomyiidae, Tertiary, Palaeogene, early Eocene, amber, France, new genera, new species