New fossil Vitimotauliidae (Insecta: Trichoptera) from the Jehol Biota of Liaoning Province, China

A new genus Sinomodus gen. nov. with three new species of Vitimotauliidae are described and illustrated from Jehol Biota, the Yixian Formation in western Liaoning Province, northeastern China. Based on these well-preserved specimens, diagnosis of this family is revised, key to genera of Vitimotauliidae and key to species of Sinomodus gen. nov. are given. The age of Sinomodus gen. nov. and the distribution of Family Vitimotauliidae are proposed. The variability of the wing venation of this family is discussed for the first time.