The dorsal side is covered with overlapping scales (elytra). The shape of the elytra varies from round, reniform to cordiform depending on the body part. They are usually covered with papillae. The body is long (up to 200 mm) and has numerous segments; dorsal side is convex, ventral side is flattened. The dorsal side has a light grey, yellowish or brownish colour with red to black transverse bands.
Degraer, S.; Wittoeck, J.; Appeltans, W.; Cooreman, K.; Deprez, T.; Hillewaert, H.; Hostens, K.; Mees, J.; Vanden Berghe, E.; Vincx, M. (2006). The macrobenthos atlas of the Belgian part of the North Sea. Belgian Science Policy. D/2005/1191/3. ISBN 90-810081-6-1. 164 pp. (look up in IMIS)