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The visual pigment of a stomatopod crustacean squilla empusa

, : The visual pigment of a stomatopod crustacean squilla empusa. Journal of Comparative Physiology A Sensory Neural & Behavioral Physiology 156(5): 679-687

Stomatopod crustaceans are visually active animals which have large, mobile compound eyes of unique design. Aspects of their ecology and behavior suggest they may be able to discriminate hues. Isolated rhabdoms of the squillid stomatopod, S. empusa, were investigated using microspectrophotometry and fluorometry. A single rhodopsin, of .lambda.max 507 nm, exists in the main rhabdom. Its stable metarhodopsin, with .lambda.max 503 nm, possesses typical arthropod fluorescence characteristics. No evidence was found for a visual pigment with peak absorption in the ultraviolet. Vision in this animal might therefore be monochromatic.

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