Triassurus is an extinct genus of amphibian, and the oldest member of Caudata (salamanders and close relalatives).

It is known from the Middle to Upper Triassic (Ladinian-Carnian) aged Madygen Formation in Kyrgyzstan.

Holotype specimen had tiny skull just 3.8 mm (0.15 in) long, but it was probably a larva: the neural arches of the vertebrae were still paired and no vertebral centers show any degree of ossification.

Some vertebral characteristics, in reality, would lead not only to primitive salamanders such as Hynobius but also to the larval forms of frogs and to the temnospondyls.

[1] In 2020 Triassurus was definitely determined to a caudatan, based on four apomorphies shared with salamanders: "parasphenoid shape and dorsal surface, with a V-shaped anterior depression, an unpaired posteromedial crest, and a radial arrangement of furrows; parietal not plate-like and rectangular but L-shaped; squamosal forming a straight transverse strut with slightly expanded lateral end and well-expanded medial end, without squamosal embayment; and straight scapula with expanded ends".