A genus of Labyrinthodont Amphibians.
"The Ancient Life History of the Earth" by Henry Alleyne Nicholson
He has also written memoirs on Saurians and Labyrinthodonts.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6" by Various
Salamander-like larvae of labyrinthodonts are well known, especially those formerly supposed to comprise the order Branchiosauria.
"The Ancestry of Modern Amphibia: A Review of the Evidence" by Theodore H. Eaton