Ductina is a genus of extinct, small to average sized, eyeless phacopid trilobite, that lived during the Devonian.

The body of Ductina is small to average (up to 5 centimetres (2.0 in)), 1¼ to 2 times as long as wide, blunted oval.

[1] The natural fracture lines (sutures) of the cephalon coincide with its margin (unique with the Phacopidae), so there are no free cheeks (or librigenae).

[4] Fossils of D. ductifrons have been found in the Famennian[5] of the United Kingdom, Germany (Eskesberg, Nehden,[3] Varresbeck,[4] Archived 2012-04-26 at the Wayback Machine all near Wupperthal), Poland (near Psiarnia, in the Southern part of the Holy Cross Mountains 50°53′N 20°55′E / 50.883°N 20.917°E / 50.883; 20.917),[6] and the Western Urals in Russia.

[3] It has also been found as part of a species rich community characteristic of a shallow coral sea.