Original Paper


, Volume 99, Issue 1, pp 3-10

First online:

A novel marine silk

  • Katrin KronenbergerAffiliated withOxford Silk Group, Department of Zoology, University of OxfordEM and Imaging Resource Facility, St. George’s, University of London
  • , Cedric DickoAffiliated withOxford Silk Group, Department of Zoology, University of OxfordPure and Applied Biochemistry, Chemical Centre, Lund University
  • , Fritz VollrathAffiliated withOxford Silk Group, Department of Zoology, University of Oxford Email author 

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The discovery of a novel silk production system in a marine amphipod provides insights into the wider potential of natural silks. The tube-building corophioid amphipod Crassicorophium bonellii produces from its legs fibrous, adhesive underwater threads that combine barnacle cement biology with aspects of spider silk thread extrusion spinning. We characterised the filamentous silk as a mixture of mucopolysaccharides and protein deriving from glands representing two distinct types. The carbohydrate and protein silk secretion is dominated by complex β-sheet structures and a high content of charged amino acid residues. The filamentous secretion product exits the gland through a pore near the tip of the secretory leg after having moved through a duct, which subdivides into several small ductules all terminating in a spindle-shaped chamber. This chamber communicates with the exterior and may be considered the silk reservoir and processing/mixing space, in which the silk is mechanically and potentially chemically altered and becomes fibrous. We assert that further study of this probably independently evolved, marine arthropod silk processing and secretion system can provide not only important insights into the more complex arachnid and insect silks but also into crustacean adhesion cements.


Marine amphipod Crassicorophium bonellii Silk gland Extrusion spinning Barnacle Spider