Septemchitonidae is an extinct family of chitons (Polyplacophora) known from Europe and North America. Morphologically, the clade is defined by rectangular plates, (2020). 9781351115230, CRC Press. . ISBN 9781351115230 and the upside-down V-shape of species' valves when viewed in cross-section. (2025). 9780877104889, Paleontological Research Institution. . ISBN 9780877104889
