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]
^Palmer, D., ed. (1999). The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals. London: Marshall Editions. p. 54. ISBN1-84028-152-9.
^Fritsch, A. (1875). "Über die Fauna der Gaskohle des Pilsner und Rakonitzer Beckens". Sitzungsberichtde er Böhemischen Gesellschaft der Wissenschaften. Prague. pp. 70–79.{{cite book}}: CS1 maint: location missing publisher (link)
^Huxley, T. H.; Wright, E. P. (1867). "On a collection of fossil vertebrates, from the Jarrow Colliery, County of Kilkenny, Ireland". Transactions of the Royal Irish Academy. 24: 351–369.