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

The species of the genus Ductina lived during the Devonian in Europe and South-East Asia.

All phacopids were probably marine bottom-dwellers. D. vietnamica has been found with several open water species (Nandan Formation in Guanxi, China), indicating deep and dark waters, probably poor in oxygen near the bottom where Ductina lived.It has also been found as part of a species rich community characteristic of a shallow coral sea.