sirenidae การใช้

The position of the Sirenidae is disputed; the position shown is considered by Naish to explain the data best.
The third suborder, Sirenoidea, contains the four species of sirens, which are in a single family, Sirenidae.
Other, more distantly related salamander families also contain fully or in part aquatic species, such as the mole salamanders, the Proteidae, or the Sirenidae.
Certain primitive salamanders in the families Sirenidae, Hynobiidae and Cryptobranchidae practice external fertilisation in a similar manner to frogs, with the female laying the eggs in water and the male releasing sperm onto the egg mass.
They are present on non-transforming salamander species, such as most members of the Proteidae family ( the olm and mudpuppies ) and the Sirenidae family, which naturally never metamorphose into an air-breathing form.