, Volume 107, Issue 3–4, pp 361–374 | Cite as

Fine structure and optical properties of an ostracode (Crustacea) nauplius eye

  • A. Andersson
  • D. -E. Nilsson


InNotodromas monachus, the three cups of the nauplius eye are formed by four pigment cells. The insides of the cups are lined with tapetal cells, which produce several layers of reflecting crystals. The reflecting crystals form a concave mirror in each cup upon which the retinular cells rest. The two-celled rhabdoms are few and perpendicular to the tapetal layer. The axons from the tripartite eye leave the retinular cells distally in three separate groups. The eye is thus of the inverse type. Large lens cells, with a low refractive index, are present in the open part of each cup. Distal to the lens cells, highly refractive lenses are formed in the cuticle. These lenses serve to decrease the effective curvature of the mirrors, thus enabling the reflectors to produce a focused image on the retina. The ventral cup differs by the lack of a cuticular lens and has degenerated-appearing cellular elements. The investigated nauplius eye is the only one known with both a mirror and a highly refractive lens in the dioptric apparatus.


Nauplius eye Optics Ostracoda 


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  1. Andersson, A., 1979: Cerebral sensory organs in ostracodes (Crustacea). Thesis, Lund.Google Scholar
  2. Claus, C., 1891: Das Medianauge der Crustaceen. Arb. Zool. Inst. Univ. Wien9, 225–266.Google Scholar
  3. Cohen, E. B., Pappas, G. D., 1969: Dark profiles in the apparently normal central nervous system: A problem in the electron microscopic identification of early anterograde axonal degeneration. J. comp. Neur.136, 375–396.Google Scholar
  4. Daday Dee Dees, J., 1895: Die anatomischen Verhältnisse derCyprois dispar, Chyzeri. Természetr. Füz.18, 1–123.Google Scholar
  5. Dudley, P. L., 1969: The fine structure and development of the nauplius eye of the copepodDoropygus seclusus Illg. CelluleLXVIII, 7–35.Google Scholar
  6. Eguchi, E., Waterman, T. H., 1976: Freeze-etch and histochemical evidence for cycling in crayfish photoreceptor membranes. Cell Tiss. Res.169, 419–434.Google Scholar
  7. Elofsson, R., 1966: The nauplius eye and frontal organs of the non-malacostraca (Crustacea). Sarsia25, 1–128.Google Scholar
  8. —, 1969: The ultrastructure of the nauplius eye ofSapphirina (Crustacea: Copepoda). Z. Zellforsch.100, 376–401.Google Scholar
  9. —, 1970: A presumed new photoreceptor in copepod crustaceans. Z. Zellforsch.109, 316–326.Google Scholar
  10. Fahrenbach, W. H., 1964: The fine structure of a nauplius eye. Z. Zellforsch.62, 182–197.Google Scholar
  11. Fox, H. M., Vevers, G., 1962: The Nature of Animal Colours. London: Sidgwick and Jacksson.Google Scholar
  12. Karnovsky, M. J., 1965: A formaldehyde-glutaraldehyde fixative of high osmolarity for use in electronmicroscopy. J. Cell Biol.27, 49 A.Google Scholar
  13. Land, M. F., 1965: Image formation by a concave reflector in the eye of the scallopPecten maximus. J. Physiol.179, 138–153.Google Scholar
  14. —, 1978: Animal eyes with mirror optics. Sci. Am.239, 88–99.Google Scholar
  15. Lüders, L., 1909:Gigantocypris agassizii (Müller). Z. wiss. Zool.92, 103–148.Google Scholar
  16. Müller, G. W., 1894: Die Ostracoden des Golfes von Neapel und der angrenzenden Meeresabschnitte. Fauna Flora Golf. Neapel21, 1–404.Google Scholar
  17. Nowikoff, M., 1908: Über den Bau des Medianauges der Ostracoden. Z. wiss. Zool.81, 691–698.Google Scholar
  18. Rome, R., 1947:Herpetocypris reptans Baird (Ostracode), etude morphologique et histologique: I. Morphologie externe et systeme nerveux. Cellule51, 51–152.Google Scholar
  19. Richardson, K. C., Jarret, L., Finke, E. H., 1960: Embedding in epoxy resins for ultrathin sectioning in electron microscopy. Stain Techn.35, 313–323.Google Scholar
  20. Sotelo, C., Palay, S. L., 1971: Altered axons and axon terminals in the lateral vestibular nucleus of the rat. Lab. Invest.25, 653–671.Google Scholar
  21. Turner, C. H., 1896: Morphology of the nervous system ofCypris. J. comp. Neurol.6, 20–44.Google Scholar

Copyright information

© Springer-Verlag 1981

Authors and Affiliations

  • A. Andersson
    • 1
  • D. -E. Nilsson
    • 1
  1. 1.Department of ZoologyUniversity of LundLundSweden

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