Phlegethontia

Phlegethontia is an extinct genus of aïstopod tetrapodomorphs from the Carboniferous and Permian periods of Europe and North America.^[1]

Early restoration of P. longissima

Phlegethontia Temporal range: Late Carboniferous to Early Permian
Life restoration of P. longissima
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Order:	†Aistopoda
Family:	†Phlegethontiidae
Genus:	†Phlegethontia Cope, 1871
Species
P. linearis Cope, 1871 (type) P. longissima (Fritsch, 1875)
Synonyms
Aornerpeton Lund, 1978

It was about 1 metre (3.3 ft) long, and possessed a lightly built skull with many openings, unlike some earlier relatives.^[2]

"Dolichosoma" longissima, named by Antonin Fritsch in 1875, has been reassigned to the genus Phlegethontia and is now considered to be P. longissima.^[3][4] "Dolichosoma" has been considered to be a nomen nudum because the holotype was inadequately described through a layer of matrix by Thomas Henry Huxley in 1867.^[5][6]