Reflections on the tapetum lucidum and eyeshine in lycosoid spiders

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Reflections on the tapetum lucidum and eyeshine in lycosoid spiders

In the lycosoid spiders, the secondary eyes possess a grate-shaped tapetum lucidum that reflects light, causing eyeshine when these spiders are viewed with approximately coaxial illumination. This guanine-based reflective surface is thought to increase visual capabilities in low light. We explored the eyeshine of the posterior medial eye in eight taxa of pisaurid and lycosid spiders. The taxa i...

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Fine structure of the canine tapetum lucidum.

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Electron Microscopy of the Tapetum Lucidum of the Cat

The fine structure of the tapetum of the cat eye has been investigated by electron microscopy. The tapetum is made up of modified choroidal cells, seen as polygonal plates grouped around penetrating blood vessels which terminate in the anastomosing capillary network of the choriocapillaris. The tapetal cells are rectangular in cross-section, set in regular brick-like rows, and attain a depth of...

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Comparative morphology of the tapetum lucidum (among selected species).

OBJECTIVES The phenomenon of 'eye-shine' is seen in a variety of animal species, and is generally thought to be related to the presence of an intraocular reflecting structure, the tapetum lucidum. The tapetum lucidum is a biologic reflector system that is a common feature in the eyes of vertebrates. It normally functions to provide the light-sensitive retinal cells with a second opportunity for...

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ژورنال

عنوان ژورنال: Journal of Arachnology

سال: 2013

ISSN: 0161-8202,1937-2396

DOI: 10.1636/b12-35.1