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Experimental & Applied Acarology

, Volume 4, Issue 2, pp 109–116 | Cite as

Fine structure of the sight organs in the tickHyalomma (Hyalomma) dromedarii (ixodoidea: Ixodidae)

  • Samir M. El Shoura
Article

Abstract

The paired eyes in adultsHyalomma (Hyalomma) dromedarii consists of a cuticular, transparent, convex lens extending downward as an inner, hemispherical, semitransparent projection, and underlying group of photoreceptor cells. The lateral cell cytoplasm consists mainly of interrupted cisternae of rough and smooth endoplasmic reticulum, while the cell middle side is packed with rhabdomeric microvilli. The cell basal regions become function axons forming the optic nerve. These cells are adapted to distinguish between light and darkness.

Keywords

Endoplasmic Reticulum Fine Structure Optic Nerve Basal Region Lateral Cell 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Bernard, G.D. and Miller, W.H., 1968. Interference filters in the corneas of Diptera, Invest. Ophthalmol., 7: 416–434.Google Scholar
  2. Binnington, K.C., 1972. The distribution and morphology of probable photoreceptors in eight species of ticks (Ixodoidea). Z. Parasitenkd., 40: 321–332.Google Scholar
  3. Boschek, C.B. and Hamdorf, J., 1976. Rhodopsin particles in the photoreceptor membrane of an insect. Z. Naturforsch. Teil. C., 31: 763–772.Google Scholar
  4. Carlson, S.D., Saint Marie, R.L. and Chi, C., 1984. The photoreceptor cells. In R.C. King and H. Akai (Editors), Insect Ultrastructure. Plenum Press, New York and London, Vol. II, pp. 397–433.Google Scholar
  5. El Shoura, S.M., 1987. Fine structure of the vasa deferentia, seminal vesicle, ejaculatory duct and accessory glands of the maleOrnithodoros (Pavlovskyella) erraticus (Ixodoidea: Argasidae). J. Med. Entomol., 24: 337–344.Google Scholar
  6. Franceschini, N. and Kirschfeld, K., 1976. Le contrôle automatique du flux lumineux dans l'oeil composé des Diptères. Biol. Cybern, 21: 181–203.Google Scholar
  7. Goldsmith, T.H. and Fernandez, H.R., 1968. The sensitivity of housefly photoreceptors in the mid-ultraviolet and the limits of the visible spectrum. J. Exp. Biol., 49: 669–677.Google Scholar
  8. Harris, W.A., Ready, D.F., Lipson, E., Hudspeth, A.J. and Stark, W.S., 1977. Vitamin A deposition andDrosophila photopigments. Nature (London), 266: 648–650.Google Scholar
  9. Hoogstraal, H., 1956. African Ixodoidea. 1. Ticks of the Sudan (with a special reference to Equatoria Province and with preliminary review of the generaBoophilus, Margaropus, andHyalomma. Dept. of the Navy, Bur. of Medical Surgery, Washington, D.C., 1101 pp.Google Scholar
  10. Ivanov, V.P. and Leonovich, S.A., 1983. Sensory organs. In: Yu. S. Balashov (Editor), An Atlas of Ixodid Tick Ultrastructure. Entomol. Soc. Am. Spec. Publ., pp. 191–220.Google Scholar
  11. Kirschfeld, K. and Franceschini, N., 1969. Ein Mechanismus zür Steuerung des Lichtflusses in den Rhabdomeren des Komplexauges vonMusca. Kybernetik, 6: 13–22.Google Scholar
  12. Kolb, G. and Autrum, H., 1972. Die Feisntruktur im Auge der Biene bei Hell-und Dunkeladaptation. J. Comp. Physiol., 77: 113–125.Google Scholar
  13. Meyer, E.P. and Labhart, T., 1981. Pore canals in the cornea of a functionally specialized area of the honeybee's compound eye. Cell Tissue Res., 216: 491–501.Google Scholar
  14. Panfilova, I.M., 1976. Reaction of ixodid ticks (Ixodes persulcatus, Dermacentor silvarum, andHaemaphysalis concinna) on light. Zool. Zh., 55: 371–377.Google Scholar
  15. Paulus, H.F., 1979. Eye structure and the monophyly of the arthropoda. In:A.P. Gupta (Editor), Arthropod Phylogeny. Van Nostrand-Reinhold, Princeton, N.J., pp. 299–383.Google Scholar
  16. Phillis, W.A. and Cromroy, H.L., 1977. The microanatomy of the eye ofAmblyomma americanum (Acari: Ixodidae) and resultant implications of its structure. J. Med. Entomol., 13: 685–698.Google Scholar
  17. Schulze, P., 1951. Vergleichend-morphologische Untersuchungen über die Augen der Schildzecken (mit Ausblicken auf die mutmaßliche Trilobitenverwandtschaft der Ixodids). Zool. Jahrb. Abt. Anat. Ontog. Tiere, 17: 289–324.Google Scholar
  18. Varela, F.G. and Wiitanen, W., 1970. The optics of the compound eye of the honeybee (Apis mellifera). J. Gen. Physiol., 55: 336–358.Google Scholar
  19. Wald, G., 1968. The molecular basis of visual excitation. Les Prix Nobel, The Nobel Foundation, Stockholm, pp. 260–280.Google Scholar
  20. Wehner, R. and Meyer, E., 1981. Rhabdomeric twist in bees—artefact or in vitro structure? J. Comp. Physiol., 142: 1–17.Google Scholar
  21. Wehner, R., Bernard, G.D. and Geiger, E., 1975. Twisted and non-twisted rhabdoms and their significance for polarization detected in the bee. J. Comp. Physiol., 104: 225–245.Google Scholar

Copyright information

© Elsevier Science Publishers B.V. 1988

Authors and Affiliations

  • Samir M. El Shoura
    • 1
  1. 1.Department of Cell and Structural Biology, School of Biological SciencesUniversity of ManchesterManchesterUK

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