Letter: Retinas of the electric ray (Narcine brasiliensis) and the freshwater stingray (Paratrygon motoro).
D000818:Animals; D001938:Brazil; D004557:Electric Organ; D005399:Fishes / Q000033:anatomy & histology*; D009474:Neurons; D010786:Photoreceptor Cells / Q000033:anatomy & histology; D012160:Retina / Q000033:anatomy & histology*; D013045:Species Specificity