... for processing color vision, yet they maintain four opsin-based spectral classes in their compound eyes. Pancrustacea Behavior Color vision Electroretinography Opsin Many animals that possess fine-scale color discrimination have four or more spectral photoreceptor classes ( Kelber and Osorio...

... behavior in spectrally variable, dim light environments, suggesting simple visual neuroanatomy is used for luminance vision. Pancrustacea Behavior Color vision Electroretinography Opsin To determine whether notostracan and anostracan branchiopods use light for depth selection...