“…Placoderm remains are known from Asia, Australia, Africa, Europe and South and North America (Denison, 1978;Janvier et al, 1997;Szrek, 2006;Janvier, 2007;Long & Trinajstic, 2010;Long & Daeschler, 2013;Olive et al, 2016). Among these bony plates, scales, tooth plates and even elements of the axial skeleton of placoderms are represented (Ritchie, 2005;Trinajstic & Hazelton, 2007;Johanson & Trinajstic, 2014), but the plates are most of-ten encountered remains of armoured fishes, as a result of which they are diagnostic features not only of several orders of Placodermi (representatives of different orders may possess different patterns of sculpture; see Fig.…”