Traquairaspidiformes is an order of extinct heterostracan agnathan fish known from the Silurian and Early Devonian periods.

Fossils are predominantly known from Late Silurian fluvial deposits from Wales and England: some species were also found in strata representing shallow water marine environment in Canada and North America.

Intact specimens of Weigeltaspis suggest a living animal similar to psammosteids like Drepanaspis.

[2] The armor of Phialaspis symmondsi (once considered as species of Traquairaspis[3]) is shaped like a jet plane or paper airplane, with pointed wing-like crests and a dorsal crest near the posterior end of the armor.

The body of "Yukonaspis," Traquairaspis angusta, is greatly elongated, based on the holotype, a ventral plate.