Hurdia is an extinct genus of hurdiid radiodont that lived 505 million years ago during the Cambrian Period.

[3] However, anatomy of Aegirocassis clarified that Hurdia had both ventral and dorsal flaps, and gills were on trunk segments.

[5] Hurdia had cosmopolitan distribution; two described species has been recovered from the Burgess Shale in British Columbia, Canada.

In 1996, then-curator of the Royal Ontario Museum Desmond H. Collins erected the taxon Radiodonta to encompass Anomalocaris and its close relatives, and included both Hurdia and Proboscicaris in the group.

[10] He presented his ideas in informal articles,[12][13] and it was not until 2009, after three years of painstaking research, that the complete organism was reconstructed.