A well-preserved minute litter bug in mid-Cretaceous Kachin amber from northern Myanmar (Heteroptera, Dipsocoromorpha)

Although Dipsocoromorpha are one of the most ancient lineages of true bugs, their hitherto known fossil record was extremely scarce. Herein, Kachinia cretacea gen. et sp. nov., ascribed to Schizopteridae: Hypselosomatinae, is described based on a female adult in mid-Cretaceous Kachin amber from northern Myanmar. The new taxon shares some primitive traits with other Mesozoic schizopterids, but also derived a series of autapomorphic characteristics. The two Mesozoic schizopterid genera Hexaphlebia and Lumatibialis, which have not been assigned to subfamily level, are tentatively treated as early representatives of Hypselosomatinae based on their complex tegminal venation similar to that of the genus Hypselosoma. Additionally, a key to all known fossil species of Schizopteridae is provided on the basis of tegminal features. Our findings further confirm Schizopteridae as one of the basal clades of Dipsocoromorpha, being highly diversified and widespread by the late Mesozoic. (C) 2018 Elsevier Ltd. All rights reserved.