Abstract

A new genus and species of the extinct lacewing family Mesochrysopidae, Burmotachinymphes bilobata gen. et sp. nov., is described from the mid-Cretaceous of northern Myanmar. This new genus can be easily distinguished from most known mesochrysopids by the RP+MA diverged from RA at an angle of ＞30° and strongly zigzagged along entire stem, and by the pectinate branches of MP2. Systematic position of Burmotachinymphes gen. nov. and the potential function of its unique pretarsal structure, i.e., the bilobed arolium with a pair of claw-like processes, are discussed. Additionally, a checklist of known mesochrysopid species and a revised diagnosis of Tachinymphinae are provided.