Salamandroidea is a suborder of salamanders, the advanced salamanders. The members of the suborder are found worldwide except for Antarctica, Southern Sahara, and Oceania.
All members use internal fertilization.[1] The female is fertilized by a spermatophore, a sperm-containing cap put by the male in her cloaca. The sperm is stored in on the roof of the cloaca until it is needed at the time of egg laying.[2]
The earliest known salamandroid fossils are from the Tiaojishan Formation. They are dated to the late Jurassic period about 157 million years ago.[3]
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