Cydia crassicornis is a moth of the family Tortricidae. It was first described by Lord Walsingham in 1907. It is endemic to the island of Hawaii.[1]
It is known from a single male and is possibly extinct.[2]
. Elwood Zimmerman . 1978 . Insects of Hawaii . 9 Microlepidoptera . The University Press of Hawaii, Honolulu. 10125/7338 .