Peltidium
Peltidium is a prodorsal shield found in animals of the subphylum Chelicerata, in the phylum Arthropoda. In some groups, the peltidium, also known as the schizopeltid, can be subdivided into the propeltidium, a carapace-like shield that covers the proterosoma, which comprises the fused acron and first four segments, and two free segments, the mesopeltidium and metapeltidium.