lˈaɪk ˈʌðɚ hˈɛɾɚɹˌoʊstɹækən fˈɪʃᵻz, tˈɛɹæspiz hæd ɐ pɹətˈɛktɪv ˈɑːɹmɚd plˈeɪɾɪŋ kˈʌvɚɹɪŋ ðə fɹˈʌnt ʌv ɪts bˈɑːdi.
Like other heterostracan fishes, Pteraspis had a protective armored plating covering the front of its body.