See Gao & Shubin (2003): http://www.nature.com/nature/journal/v422/n6930/full/nature01491.html :
".. the earliest known record of crown-group urodeles (living salamanders and their closest relatives)."

According to Carroll & Zheng (2012), "Jeholotriton is known only from the Daohugou locality in Ningchen, south-eastern Inner Mongolia.
It may be close to the base of the modern Urodele radiation, and might provide evidence of their transition from putative ancestors in the Permo-Triassic."