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Different aspects of the limit of the tapetum lucidum in prosimians

, : Different aspects of the limit of the tapetum lucidum in prosimians. Vision Research 16(4): 387-391

The tapetum lucidum is a specialized structure existing among all nocturnal prosimians and in a few diurnal forms. Near the ora serrata its aspect is quite different according to the species (bright golden circles or a spotted golden surface with black convergent lines). Histological studies showed that these various types were related to different dispositions of the granules in the pigmentary epithelium (granules had a very precise shape, e.g., sharp and oblong needles). The advantages of these types of pigmentation were related to ethoecological conditions, as shown by observations in the wild. The peculiar shape and arrangement of the granules might be responsible for an effect similar in its mechanism to Stiles-Crawford effect. The evolution of the eye of closely related species living in different ecological niches is considered.

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Accession: 005151890

PMID: 821249

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