The discovery, based on two specimens, constitute the first record of the living family Psychomyiidae in Burmese amber and the oldest known member of this family in the fossil record. Burmese amber is 100 million years old, from the Cretaceous Period, so this discovery adds to our understanding of the caddisfly fauna in that part of the world at that time.
Wichard, W., Ross, E. & Ross, A.J. (2011) Palerasnitsynus gen. n. (Trichoptera: Psychomyiidae) from Burmese amber. 130 : 323-330, doi: 10.3897/zookeys.130.1449