In recent years, as more and more fossil species of berothids from Myanmar have been reported, the species and morphological diversity of Berothidae continues to increase. Herein, one new species of Berothidae, Aggregataberotha paucipunctata sp. nov., and one new genus, Sejunctaberotha gen. nov., with three new species (Sejunctaberotha sphaerica gen. et sp. nov., Sejunctaberotha tenuis gen. et sp. nov. and Sejunctaberotha transversa gen. et sp. nov.) are described from mid-Cretaceous Myanmar amber. A. paucipunctata sp. nov. is assigned to Aggregataberotha Wang, Huang & Wang, 2022, based on the characteristics of the similar female terminalia and wing venation, but can be different from A. punctate regarding the pale pterostigma and a few detailed features of wing venation. Additionally, representatives of Sejunctaberotha gen. nov. are remarkably different from the representatives of the other genera within Berothidae in the configuration of wing venation. For example, Sejunctaberotha gen. nov. has simple subcostal veinlets, obviously free Sc and RA at the apex present both in fore- and hindwings, a single ra-rp crossvein connecting the RA with RP3, a single rp-m crossvein locating before the origin of the MP, a simple CuP and no gradate veins. Interestingly, in one of the specimens of Sejunctaberotha gen. nov., a pair of spherical bulges was found at the end of the antennae. The new genus Sejunctaberotha gen. nov. suggests that Berothidae had a higher potential diversification during the Mesozoic Era.

Two new genera and two new species of kalligrammatids, Electrogramma transformatum gen. et sp. nov. and Lasiogramma ooideum gen. et sp. nov., are described from the Late Cretaceous Myanmar amber. Electrogramma gen. nov. differs from other genera by its relatively large wing size; with a set of interlinked veinlets between costal crossveins, multiple rows of cells in base of CuP and AA; CuA distal forked while CuP pectinately branched near wing base in hind wing. And Lasiogramma gen. nov. is distinguished from other genera by its forewing RP1‒RP3 originating independently from R; costal crossveins absent; RP1 simple; nygma and eye-spot absent. A list of named kalligrammatids is also provided.

One new genus (Ocrognethoda gen. nov.) and three new species of webspinners (Ocrognethoda olivea gen. et sp. nov., Gnethoda lata sp. nov. and Parasorellembia hamata sp. nov.) are described from the Upper Cretaceous of Myanmar amber. Ocrognethoda olivea gen. et sp. nov. and Gnethoda lata sp. nov. are attributed to the family Clothodidae due to their simplified and symmetrical male terminalia, in which the tenth tergum is undivided. Parasorellembia hamata sp. nov. is classified in the family Scelembiidae by a specialized abdominal apex: fused cerci, a broad right hemitergite of the tenth abdominal tergite, and ocelli presence. Moreover, based on the discovery of new genus and species, the male terminalia of Clothodidae and Sorellembiinae are briefly discussed.

One new genus and species of Ithonidae, Cretithone zhangi gen. et sp. nov., is described from the mid-Cretaceous Kachin amber. Cretithone gen. nov. is distinguished from other fossil ithonids by the combination of the following characteristics: exceptionally broad costal space; proximal branches of RP fused into a single vein and then fused with M; medial branches of RP fused with each other; simple basal M, with marginal forks; CuA divided into two main branches, the anterior branch with posteriorly directed subbranches and the posterior branch with anteriorly directed subbranches; and most proximal branches of CuP fused with adjacent branches. The new genus and species has been assigned to the Principiala genus-group by the fusion of the proximal branches of RP and the peculiar configuration of M and CuA. Variations in the forewing characteristics among the fossil ithonids are briefly discussed.

Two new genera and three new species of webspinners, Electroclothoda aroliata gen. et sp. nov., Cretembia longimandibula gen. et sp. nov. and Parasorellembia grandiocula sp. nov., are described from the Upper Cretaceous of Myanmar amber. Electroclothoda aroliata gen. et sp. nov. is classified in the Clothodidae by having symmetrical male terminalia and an undivided tenth abdominal tergum. Cretembia longimandibula gen. et sp. nov. and Parasorellembia grandiocula sp. nov. are attributed to the Scelembiidae based on their distinctive terminalia: asymmetrical male terminalia, slender left cercus and robust, hook-shaped right cercus. Furthermore, a more detailed interpretation of terminalia architecture in Scelembiidae is provided.