Septemchitonidae
Septemchitonidae is an extinct family of chitons known from Europe and North America. Morphologically, the clade is defined by rectangular plates, and the upside-down V-shape of species' valves when viewed in cross-section.
Septemchitonidae is an extinct family of chitons known from Europe and North America. Morphologically, the clade is defined by rectangular plates, and the upside-down V-shape of species' valves when viewed in cross-section.