Euarchontan Opsin Variation brings New Focus to Primate Origins.
Saint Louis, United States. In Mol Biol Evol, Feb 2016
For example, it is hypothesized that variable expression of short- (SWS1) and middle-to-long-wavelength sensitive (M/LWS) opsins, which confer color vision, can be used to infer ancestral activity patterns and therefore selective ecological pressures.
Visual system evolution and the nature of the ancestral snake.
São Paulo, Brazil. In J Evol Biol, Jul 2015
In snakes, but not lizards, dedicated fossoriality (as in Scolecophidia and the alethinophidian Anilius scytale) corresponds with loss of all visual opsins other than RH1 (λmax 490-497 nm); all other snakes (including less dedicated burrowers) also have functional sws1 and lws opsin genes.
[Current views on vision of mammals].
In Zh Obshch Biol, 2012
Theria, except some primates, also have two cone visual pigments: SWS1 (ultraviolet/violet or blue-sensitive 1) and MWS/LWS along with rod RH1.
Early evolution of vertebrate photoreception: lessons from lampreys and lungfishes.
Brisbane, Australia. In Integr Zool, 2009
Each receptor type also contains a different visual pigment (opsin gene); that is, LWS, SWS1, SWS2, RhA and RhB in G. australis and LWS, SWS1, SWS2, Rh1 and Rh2 in N. forsteri, all of which are expressed within the retina and are sensitive to different parts of the electromagnetic spectrum, providing the potential for pentachromatic and tetrachromatic color vision, respectively.