👉 A chondropterygian is a type of echinoderm, a group of flatworms that are part of the phylum Chordata. They are characterized by their flattened bodies and lack a backbone or vertebral column. These organisms have a single cell body surrounded by a series of specialized cells called chondria, which give them their unique shape. Chondropterygians play an important ecological role in aquatic environments, as they help to break down dead
