Canadaspis perfecta (Walcott, 1912). (A,B) ROM 62274, supposed synchronized molting (-350 level); (A) complete slab; (B) close-up image of (A) showing dozens of shields. (C,D) ROM 56954; (C) aggregation of carcasses from the same level (-350); (D) close-up image of (C); (E) ROM 61119, close-up image of a single carcass showing limbs and evidence of gut (G) (-320 level). Scale bars: 10 cm (A); 2 cm (B,C); 1 cm (D,E).
Haug et al. BMC Biology 2013 11:64 doi:10.1186/1741-7007-11-64