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Scanning electron microscopy shows that the quill surface from the thin-spined porcupine (Chaetomys subspinosus (Olfers 1818)) has several regional cuticular patterns of which the most expansive is highly pitted with 4-µm wide pores leading to pits, which in turn communicate circumferentially via tunnels to neighboring pits. The cell unit of the pitted layer is a hexagonal or pentagonal prism, the 'pitted fibrillous cuticular cell' (PFCC), which has a superficial pitted cuticular scale-deriveddoi:10.1139/cjz-2017-0281 fatcat:n24yzk552rhq3cpxf7zuuftlfu