Abstract:  Miodentosaurus brevis was first established on the basis of the skull and mandible of a fairly preserved skeleton from the Triassic Falang Formation, Guanling area, GuizhouProvince. The description of the postcranial skeleton reveals that M. brevis is also distinct in the morphology of its girdle elements, such as the coracoid with a small embayment just posterior to the glenoid, interclavicle becoming much narrower posteriorly than anteriorly, and the ilium having a dorsal blade with a expanded distal end. With a further preparation, some of the skull anatomies are redescribed. Based on new information from both skull and the postcranial skeleton, the diagnosis of the taxa is revised. A phylogenetic analysis suggests thatM. brevis is an askeptosauroid, closely related to Askeptosaurus from Switzerland and Italy on the basis of two unequivocal synapomorphies, a retroarticular process broader than long and a reduced deltopectoral crest in the humerus.