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.