Siredon

Si`re´don


n.1.(Zool.) The larval form of any salamander while it still has external gills; especially, one of those which, like the axolotl (Amblystoma Mexicanum), sometimes lay eggs while in this larval state, but which under more favorable conditions lose their gills and become normal salamanders. See also Axolotl.
References in periodicals archive ?
In nature, this seems to be a rare alternative to sexual reproduction, only used by several clam families, a Saharan cypress tree, the Mexican axolotl Siredon mexicanum (reviewed in McKone & Halpern, 2003; Tulecke, 1965), some interspecific hybrids between Sicilian stick insects of the genus Bacillus (Mantovani & Scali, 1992), and in the particular case of a Drosophila mutant (Komma & Endow, 1995).