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Zinc phosphate granules in tissue surrounding the midgut of the barnacle Balanus balanoides


The chemical composition of inorganic granules found in parenchyma cells surrounding the midgut of adult Balanus balanoides (L.) was determined. X-ray microanalysis indicated the presence of magnesium, phosphorus, potassium, calcium, iron and zinc in the granules. A quantitative analysis of granule-rich pellets isolated from the midguts of adult barnacles showed that the granules were composed mainly of zinc phosphate, the remaining elements being minor constituents only.

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Communicated by J.H.S. Blaxter, Oban

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Walker, G., Rainbow, P.S., Foster, P. et al. Zinc phosphate granules in tissue surrounding the midgut of the barnacle Balanus balanoides . Marine Biology 33, 161–166 (1975).

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  • Iron
  • Calcium
  • Phosphate
  • Zinc
  • Potassium