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Fig. 3. Normalized absorbance spectra of rod and cone visual pigments in (A) the giant shovelnose ray Rhinobatos typus, and (B) the eastern shovelnose ray Aptychotrema rostrata. Prebleach spectra (circles) are best-fitted with a rhodospin visual pigment template of the appropriate {lambda}max; postbleach spectra (squares) are fitted with an unweighted running average. SWS, MWS and LWS refer to short-, medium- and long-wavelength-sensitive visual pigments, respectively.