A new fossil genus of Bibionidae (Diptera: Bibionomorpha), Burmahesperinus gen. nov., from the mid-Cretaceous Burmese amber, is described and illustrated (type species Burmahesperinus antennatus sp. nov., the other two species included are B. conicus sp. nov. and B. pedicellatus sp. nov.). The new genus is tentatively placed in a new subfamily, Burmahesperininae subfam. nov. of the family Bibionidae. Its possible phylogenetic position is briefly discussed. The new genus, as well as the subfamily, possesses the wing venation similar to the recent genus Hesperinus Walker, 1848, in combination with Brachycera-like modification of both the male and female antenna and the overall habitus typical of fungus gnats (Sciaroidea).

Department of Biology and Ecology Faculty of Science University of Ostrava Chittussiho 10 71000 Ostrava Czech Republic

Department of Teacher Education NLA University College Bergen P O Box 74 Sandviken 5812 Bergen Norway

Institute of Systematics and Evolution of Animals Polish Academy of Sciences Sławkowska 17 31 016 Kraków Poland

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