Ganseriella pankowskiorum Fedotova et Perkovsky, gen. et sp. n. has been described from the Late Cretaceous Burmese amber. The new genus is closely related to the genus Chastomera Skuse, 1888 stat. resurr., which was considered a synonym of Haplusia Karsch, 1877. Earlier, only Winnertzia burmitica (Cockerell) (Winnertziini) was described from Burmese amber. The new species is the first described Cretaceous representative of the tribe Diallactiini from Asia. Three species of fossil Diallactiini were described earlier: Cretohaplusia ortunoi Arillo et Nel, Palaeocolpodia eocenica Meunier and Diallactia bifurcata (Fedotova, 2004). The genera and species compositions of Cretaceous gall midges and fossil Diallactiini are reviewed.