Orthrozanclus reburrus ("Dawn scythe with bristling hair") was discovered in 2006 and formally described in 2007. This animal had a soft, unarmored underside, but the upward-facing surfaces were armored by: a small shell, near the front end; three zones of armor plates, which fitted close to the body and one of which ran all the way round the animal; 16 to 20 long, upwards-curving spines on each side of the body.[1] The arrangement of Orthrozanclus′ armor plates is very similar to that of its Burgess Shale contemporary Wiwaxia.