Friday, January 4, 2013

Glowing spider eyes

UV induced fluorescence of spider eyes

Fluorescence of spiders and spider nets is a known phenomenon (see links below). Normally spiders have fluorescent cuticles that contain fluorophores (chemicals that absorb and re-emit light) as a component of the haemolymph (a fluid similar to the blood of vertebrates).
The photos show a specimen of the tarantula Eurypeime spinicrus that has fluorescent eyes. It can be observed by long-wave ultraviolet light (UV A). The fluorescence is green that means the absorbed ultraviolet light is emitted with a wavelength of approximately 550 nm. The fluorescence of eyes means that they contain also some fluorophores like those in the haemolymph.

For further reading:

This is the head of Eurypeime spinicrus:

The eyes of Eurypeime spinicrus in visible light:

 The eyes of Eurypeime spinicrus in UV A:

 And the eyes in UV B:

No comments:

Post a Comment

Thank you for the comment and the visit.

Related Posts Plugin for WordPress, Blogger...