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The physical and morphological properties of the pigment screen in the compound eye of a shrimp (Crustacea)

Author:
  • Göran Struwe
  • Eric Hallberg
  • Rolf Elofsson
Publishing year: 1975
Language: English
Pages: 257-270
Publication/Series: Journal of Comparative Physiology A
Volume: 97
Document type: Journal article
Publisher: Springer

Abstract english

The pigment cells of the compound eye of the shrimps (Crangon crangon andC. allmani) were studied by electron microscopy (SEM and TEM) and microspectrophotometry. The compound eyes of these species contain light-absorbing and -reflecting pigments contained in granules, located in 5 different cells. The light absorbing pigment granules (light screen) are situated in (1) the distal pigment cells, (2) the retinular cells, (3) the basal pigment cells. The reflecting pigment granules are located in (4) the distal, and (5) the proximal reflecting pigment cells. Another innominate cell type investing the ommatidia contains vacuoles without pigment content. The innominate cell type, and the basal absorbing pigment cell (3) listed above, have not earlier been reported for a crustacean species. Measurements of the spectral absorption on sliced and squashed ommatidia show that all components of the light screen have an increased absorption in the wavelength regions 400–450 nm and 530–570 nm, probably due to xanthommatin and ommin. The spectral absorbancy of the reflecting pigment cells were not determined. Similar cells in other species are known to contain pteridines.

Keywords

  • Zoology

Other

Published
  • ISSN: 1432-1351
Eric Hallberg
E-mail: eric [dot] hallberg [at] biol [dot] lu [dot] se

Professor emeritus

Functional zoology

+46 46 222 46 78

B-B325

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