L. conchilega is widely distributed in the area, i.e. from the tidal estuaries to the Dogger Bank in the north. Locally it is found with extremely large numbers (over 3000 ind./m²). The highest densities are found north of the Wadden islands, from Terschelling to the eastern boundary of the Dutch sector of the North Sea. When living in dense patches, the species can form an important part of the total biomass of an area.
- Holtmann, S.E.; Groenewold, A.; Schrader, K.H.M.; Asjes, J.; Craeymeersch, J.A.; Duineveld, G.C.A.; van Bostelen, A.J.; van der Meer, J. (1996). Atlas of the zoobenthos of the Dutch continental shelf. Ministry of Transport, Public Works and Water Management: Rijswijk, The Netherlands. ISBN 90-369-4301-9. 243 pp. http://www.marinespecies.org/aphia.php?p=sourcedetails&id=83