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Functional anatomy of the midgut gland of Gammarus locusta (Crustacea: Amphipoda)

  • A.D. Correia (a1), A.L. Pereira (a2), M.H. Costa (a1) and F. Carrapiço (a2)

Abstract

A description of the midgut gland of Gammarus locusta with the aim of using this organ as a complementary tool in ecotoxicological studies was made. The hepatopancreas is composed of two pairs of blind-ending tubular structures. The thickness and length of these tubules were ∼50 μm and 5 mm, respectively, in adult males (10–12 mm length). The distal part of each tubule is characterized by non-vacuolated E-cells typically exhibiting a relatively high nuclear to cytoplasmatic ratio. The epithelium of the remaining tubules is characterized by abundant columnar R- and F-cells, both ∼40 μm long. Large vacuolated B-cells (∼60 μm length) were very common along the midgut gland but seemed to increase in number in the proximal region of each tubule. An SEM examination revealed a delicate network of muscle fibres that limits the organ.

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Corresponding author, e-mail: adc@mail.fct.unl.pt

Functional anatomy of the midgut gland of Gammarus locusta (Crustacea: Amphipoda)

  • A.D. Correia (a1), A.L. Pereira (a2), M.H. Costa (a1) and F. Carrapiço (a2)

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