Alienopterixinae subfam. n. (with Alienopterix Mlynský et al. in Vrsanský et al. (2018), Nadveruzenie gen. n., Vzrkadlenie Vrsanský in Sendi et al. (2020) and Enervipraeala Luo, Xu et Jarzembowski, 2020) is proposed to house alienopterids with fully developed tegmina (symplesiomorphy with all Umenocoleidae) and a compact uniform pronotum (plesiomorphy). At least seven distinct morphological species in this complex are preserved in burmite. Alienopterix smidovae Hinkelman, sp. n./ Alienopterix mlynskyi Sendi, sp. n. possess autapomorphies, such as the absence of coloration and bunky organised in transverse rows, complex pronotum and red eye coloration respectively. Both species exhibit grooved forewing structure similar to unrelated Melyroidea Shelford, 1912 with metallic coloration. A male (unformalised) with short, symmetrical and multisegmented styli is identified for the first time. Bootstrap analysis of Umenocoleoidea now further diminishes differences between Umenocoleidae and Alienopteridae, revealia lack of structure and hierarchy in combined morphological data, while retaining structure when restricted to species from one locality. Nadveruzenie postava Vrsansky, Hinkelman et Sendi, gen. et sp. n. is described, autapomorphies include extremely thin cerci, fenestrate structure of forewings with structured fore margin and absent clavus, similar to living genus Aclavoidea Vidlicka et Vrsanský in Hinkelman et al. (2020). Diversity index within Umenocoleoidea (disregarding dominant Jantaropterix and Perspicuus pilosus Koubova in Koubova and Mlynský (2020) in burmite is near 1.0. Blattocoprolites alienopterixmlynskyi and Blattocoprolites jantaropterixellenbergeri Hinkelman, ichnospp. n., preserved and partially protruding coprolites, document defecation during burial.