Phyllodoce mucosa-maculata: In the 1976-1986 period Phyllodoce mucosa/maculata was widely distributed in the entire near-coastal zone and reached a maximum density of 70 ind./m2. The species showed a similar distribution pattern in the 1994-2001 period. However, P. mucosa/maculata was absent near the eastern coastal zone and higher densities (up to 1,500 ind./m2) were reached in the latter period.
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)