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  • Median ocellus  (1)
  • Bemisia argentifolii
  • 1970-1974  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 118 (1971), S. 297-309 
    ISSN: 1432-0878
    Keywords: Median ocellus ; Limulus ; Fine structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The median ocellus of Limulus consists of irregular groups of large photoreceptor cells which form a cup-shaped retina around the ocellar lens. Each group is surrounded and penetrated by guanophores and glia. The photoreceptor cells have extensive rhabdomeric regions, both along infoldings of cell membranes and between cells. Five-layered junctions occur between rhabdomeric microvilli. An occasional arhabdomeric (AR) cell is associated with a group of photoreceptors. Fine dendritic branches of the AR cell penetrate the rhabdomeric regions and form five-layered junctions with photoreceptor rhabdomeres. Axons of photoreceptor cells, and of at least some AR cells, gather at the proximal side of the cup to form an optic nerve.
    Type of Medium: Electronic Resource
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