inadunate References inadunate fossil echinoderm subclass Ask Anything Homework Help Also known as: Inadunata 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: Triassic Period/ InvertebratesThe inadunates survived the crisis; they did not become extinct until the end of the Triassic and gave rise to the articulates, which still exist today. Read MoreThe inadunates survived the crisis; they did not become extinct until the end of the Triassic and gave rise to the articulates, which still exist today. Read More