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


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.


Endoplasmic Reticulum Fine Structure Optic Nerve Basal Region Lateral Cell 
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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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