| Named By: | Jordan in 1849 |
| Time Period: | Permian |
| Location: | Germany. North America |
| Size: | Approximately 50 - 60 centimetres long |
| Diet: | Carnivore |
| Fossil(s): | Almost complete specimens |
| Classification: | | Chordata | Chondrichthyes | Elasmobranchii | Xenacanthida | Xenacanthidae | |
Triodus is an extinct genus of xenacanthidan shark that lived in the Permian. It was a freshwater shark, and fossils have been found in Germany.