A new species of the fossil lace bug genus Burmacader (Hemiptera: Heteroptera: Tingidae) from mid-Cretaceous Kachin amber of northern Myanmar, with implications of male genital structures

The fossil lace bug genus Burmacader Heiss and Guilbert, 2013 (Hemiptera: Heteroptera: Tingidae) is known solely from mid-Cretaceous Kachin amber of northern Myanmar. Its phylogenetic position may represent an extinct lineage sister to the megadiverse Tinginae + Cantacaderinae clade. Here, a new species of Burmacader is described under the name B. bicoloripennis sp. nov. as the fourth member of the genus from the same amber deposit. This new species is readily distinguished from the other three Burmacader species by the smaller body and the structures of the pronotum and hemelytron. The male genitalia of a fossil lace bug were observed for the first time in the new species. Furthermore, the segmental oligomery of the antenna in the fossil lace bug is reported for the first time. An identification key for all described species of Burmacader is provided. Our new finding sheds light on the structural similarity of the male genitalia between fossil and extant lace bugs and the hidden paleodiversity of this genus in the Late Mesozoic, indicating that Burmacader had already diversified by the mid-Cretaceous. (c) 2021 Elsevier Ltd. All rights reserved.