Pteraspididae is an extinct family of heterostracanvertebrates. It is an Early Devonian-aged family that contains the stereotypical, torpedo-shaped pteraspidids, such as the type genus, Pteraspis, and its close relatives Errivaspis and Rhinopteraspis, that are popularly thought to have actively swam about in the water column. The elongated rostralplate is thought to help with their hydrodynamic ability. Various genera are found in various marine and estuarine strata of Early Devonian Europe and North America.
On the recent discovery of Pteraspidian fish in the upper Silurian rocks of North America. Edward Waller Claypole, Quart. Journ. Geol. Soc. 1885, volume 41, pages 48–64, doi:10.1144/GSL.JGS.1885.041.01-04.10
Revised classification of Pteraspididae with description of new forms from Wyoming. Robert Howland Denison, Fieldiana. Geology; v. 20, no. 1, doi:10.5962/bhl.title.3330
