Seazzadactylus is a basal pterosaur genus that lived during the late Triassic (Norian stage, about 219-214 million years ago)[1] in the area of present-day Italy.

In 1997, amateur paleontologist Umberto Venier discovered the skeleton of a pterosaur in a boulder laying in the bed of the Seazza brook, just before it joins the Tagliamento river, near Preone in the Dolomites.

Venier brought the find to the Museo Friulano di Storia Naturale at Udine.

After partial preparation paleontologist Fabio Marco Dalla Vecchia announced the discovery in the scientific literature in 2000.

The holotype, MFSN 21545, was found in a layer of the Dolomia di Forni Formation dating from the middle to upper Norian.

A cladistic analysis showed it was part of a yet-unnamed clade also containing Arcticodactylus, Austriadraco, Carniadactylus, Raeticodactylus and Caviramus.