A blood sucking biting midge from Upper Cretaceous Burmese amber with a key to the determination of fossil species in the relictual genus Leptoconops Skuse (Diptera: Ceratopogonidae)

Leptoconops ellenbergeri Szadziewski sp. nov., a new blood sucking biting midge from Upper Cretaceous Burmese amber is described and illustrated. A key for the determination of 18 named fossil species of Leptoconops reported from Lower and Upper Cretaceous and Eocene ambers is provided. Fossil records show that Leptoconops is an old relictual pantropical genus that was distributed worldwide in the Cretaceous, and also indicate that in the tropical ecosystems of Burmese amber forests sea shore environments (coastal or estuarine) were present.