Depressaria ultimella is a moth of the Depressariidae family. It is found in most of Europe, except Spain, Norway, Finland, Lithuania, Switzerland, Italy and most of the Balkan Peninsula. The wingspan is 17–21 mm. Adults are on wing from August to (after overwintering) the following spring. The larvae feed on Oenanthe, Sium, Berula and Apium nodiflorum. They initially feed inside the shoot of their host plant. Later, it moves to the main stem. Young larvae are transparent, tinted yellowish with a black head. Older larvae are transparent shiny light brown with an umber coloured head.