| Named By: | Y.inN. Cheng, X.inC. Wu, & T. Sato in 2007 |
| Time Period: | Late Triassic, 235.0-221.5 Ma |
| Location: | China, Guizhou Province - Xiaowa Formation |
| Size: | From 2.5 to as much as 5.5 meters long |
| Diet: | Carnivore/Piscivore |
| Fossil(s): | Remains of at least one individual |
| Classification: | | Chordata | Reptilia | Thalattosauria | |
Miodentosaurus is a genus of thalattosaurian (a type of extinct marine reptile) from the Late Triassic of China. Being up to 2.5-5 m in length, it was perhaps the largest thalattosaur.