Abstract A new genus and species, Archmosaicus comitatus Zhang, Deng et Ren gen. et sp. nov., assigned to the family Micropterigidae, is described based on three well-preserved specimens from the mid-Cretaceous Burmese amber. It is established mainly based on antennal scape and pedicel greatly swollen, scape with a strong indentation on mesal surface, forewing with veins Sc and R deeply forked, and hind wing without free R. The minor differences on these three specimens could be attributable to either individual variation or sexual dimorphism.

中文翻译：

---

一种来自中白垩世缅甸琥珀的新颚蛾（鳞翅目：小翅目）

摘要 一个新属和种，Archmosaicus comitatus Zhang, Deng et Ren gen。等 sp. nov. 属于 Micropterigidae 科，根据来自中白垩世缅甸琥珀的三个保存完好的标本进行描述。它的建立主要基于触角花梗和花梗大大肿胀，花梗在中表面有强烈的凹痕，前翅有深分叉的脉 Sc 和 R，后翅没有游离 R。这三个标本的细微差异可归因于任一个体变异或性别二态性。