Summary
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.
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References
Andersson, A., 1979: Cerebral sensory organs in ostracodes (Crustacea). Thesis, Lund.
Claus, C., 1891: Das Medianauge der Crustaceen. Arb. Zool. Inst. Univ. Wien9, 225–266.
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.
Daday Dee Dees, J., 1895: Die anatomischen Verhältnisse derCyprois dispar, Chyzeri. Természetr. Füz.18, 1–123.
Dudley, P. L., 1969: The fine structure and development of the nauplius eye of the copepodDoropygus seclusus Illg. CelluleLXVIII, 7–35.
Eguchi, E., Waterman, T. H., 1976: Freeze-etch and histochemical evidence for cycling in crayfish photoreceptor membranes. Cell Tiss. Res.169, 419–434.
Elofsson, R., 1966: The nauplius eye and frontal organs of the non-malacostraca (Crustacea). Sarsia25, 1–128.
—, 1969: The ultrastructure of the nauplius eye ofSapphirina (Crustacea: Copepoda). Z. Zellforsch.100, 376–401.
—, 1970: A presumed new photoreceptor in copepod crustaceans. Z. Zellforsch.109, 316–326.
Fahrenbach, W. H., 1964: The fine structure of a nauplius eye. Z. Zellforsch.62, 182–197.
Fox, H. M., Vevers, G., 1962: The Nature of Animal Colours. London: Sidgwick and Jacksson.
Karnovsky, M. J., 1965: A formaldehyde-glutaraldehyde fixative of high osmolarity for use in electronmicroscopy. J. Cell Biol.27, 49 A.
Land, M. F., 1965: Image formation by a concave reflector in the eye of the scallopPecten maximus. J. Physiol.179, 138–153.
—, 1978: Animal eyes with mirror optics. Sci. Am.239, 88–99.
Lüders, L., 1909:Gigantocypris agassizii (Müller). Z. wiss. Zool.92, 103–148.
Müller, G. W., 1894: Die Ostracoden des Golfes von Neapel und der angrenzenden Meeresabschnitte. Fauna Flora Golf. Neapel21, 1–404.
Nowikoff, M., 1908: Über den Bau des Medianauges der Ostracoden. Z. wiss. Zool.81, 691–698.
Rome, R., 1947:Herpetocypris reptans Baird (Ostracode), etude morphologique et histologique: I. Morphologie externe et systeme nerveux. Cellule51, 51–152.
Richardson, K. C., Jarret, L., Finke, E. H., 1960: Embedding in epoxy resins for ultrathin sectioning in electron microscopy. Stain Techn.35, 313–323.
Sotelo, C., Palay, S. L., 1971: Altered axons and axon terminals in the lateral vestibular nucleus of the rat. Lab. Invest.25, 653–671.
Turner, C. H., 1896: Morphology of the nervous system ofCypris. J. comp. Neurol.6, 20–44.
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This investigation has been supported by grants from the Swedish Natural Science Research Council (grant no. 2760-009) and the Royal Physiographic Society of Lund.
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Andersson, A., Nilsson, D.E. Fine structure and optical properties of an ostracode (Crustacea) nauplius eye. Protoplasma 107, 361–374 (1981). https://doi.org/10.1007/BF01276836
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DOI: https://doi.org/10.1007/BF01276836