Radiodonta

Radiodonta Temporal range: Cambrian Series 2–Early Devonian PreꞒ Ꞓ O S D C P T J K Pg N
Left to right, top to bottom: Amplectobelua symbrachiata, Anomalocaris canadensis, Aegirocassis benmoulai, Peytoia nathorsti, Lyrarapax unguispinus, Cambroraster falcatus, and Hurdia victoria
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	†Dinocaridida
Order:	†Radiodonta Collins, 1996
Families
†Anomalocarididae †Amplectobeluidae †Tamisiocarididae †Hurdiidae Genera with uncertain classification †Caryosyntrips? †Cucumericrus? †Houcaris †Innovatiocaris †Laminacaris †Paranomalocaris †Shucaris †Zhenghecaris?
Synonyms
Anomalocarida

Radiodonta is an extinct order of stem-group arthropods that was successful worldwide during the Cambrian period. Radiodonts are distinguished by their distinctive frontal appendages, which are morphologically diverse and were used for a variety of functions. Radiodonts were among the earliest large predators, but they also included sediment sifters and filter feeders.^[1] Some of the most famous species of radiodonts are the Cambrian taxa Anomalocaris canadensis, Hurdia victoria, Peytoia nathorsti, Titanokorys gainesi, Cambroraster falcatus and Amplectobelua symbrachiata. The later surviving members include the subfamily Aegirocassisinae from the Early Ordovician of Morocco and the Early Devonian member Schinderhannes bartelsi from Germany.