Ensis directus (Conrad, 1843), Solenidae, Bivalvia ( Jackknife clam, razor clam)
Voigt, M. (1999). Ensis directus (Conrad, 1843), Solenidae, Bivalvia ( Jackknife clam, razor clam), in: Gollasch, S. et al. (Ed.) Exotics across the ocean. Case histories on introduced species: their general biology, distribution, range expansion and impact: prepared by Members of the European Union Concerted Action on testing monitoring systems for risk assessment of harmful introductions by ships to European waters (MAS-CT-97-0111). pp. 31-35
In: Gollasch, S. et al. (1999). Exotics across the ocean: Case histories on introduced species: their general biology, distribution, range expansion and impact- Prepared by Members of the European Union Concerted Action on testing monitoring systems for risk assessment of harmful introductions by ships to European waters (MAS-CT-97-0111). Department of Fishery Biology, Institute for Marine Science, University of Kiel, Germany: Germany. ISBN 3-89722-248-5. 73 pp., meer
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