Phlegethontia
（重定向自Dolichosoma）
![](/Images/godic/202501/09/Phlegethontia4015.jpg")
![Early restoration of P. longissima](/Images/godic/202501/09/Phlegethontia_longissima4015.jpg")
Phlegethontia is an extinct genus of lepospondyl amphibian from the Carboniferous and Permian periods of Europe and North America.
Phlegethontia was an aïstopod, a group of legless, burrowing, snake-like amphibians. It was about 1 metre (3.3 ft) long, and possessed a lightly built skull with many openings, unlike some earlier relatives.