Bucculatrix transversata is a moth in the Bucculatricidae family. It is found in North America, where it has been recorded from California. The wingspan is about 7 mm. The forewings are bright brown, except along the wing margins where the scales are white with black tips. The hindwings are grey. Adults have been recorded on wing in July. The larvae feed on Ambrosia psilostachya. They feed on the upper side of the leaf, consuming irregular patches of leaf tissue. The larvae can be found in October. Pupation takes place at the end of October.