Trematopidae References Trematopidae fossil amphibian family Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: amphibian/ Annotated classification†Family Trematopidae (trematopids)Upper Pennsylvanian to Lower Permian. Vertebrae weakly ossified, large intercentrum.†Family Dissorophidae (dissorophids)Subclass Lissamphibia (lissamphibians)Lower Triassic to Read More†Family Trematopidae (trematopids)Upper Pennsylvanian to Lower Permian. Vertebrae weakly ossified, large intercentrum.†Family Dissorophidae (dissorophids)Subclass Lissamphibia (lissamphibians)Lower Triassic to Read More