What materials make up an armadillo’s carapace?

The carapace of an armadillo is composed of bony transverse bands that are covered by tough scales derived from skin tissue. These plates form a protective armor that covers much of the animal's body, including the head and, in most species, the legs and tail.1

The structure is segmented, with each band slightly overlapping the next, which allows the armadillo to expand and contract its armor like an accordion. While these plates are primarily bony, the scales covering them are a product of the animal's skin tissue.21