Pinealocytes 4 characiformes 4 opsins 4 pineal body 4 pineal complex 4 pinealocytes 4 Animals 2 Characidae 2 Characiformes 2 Didelphis albiventris (Marsupialia) 2 Fish Proteins 2 Opsins 2 Photoreceptor Cells 2 Pineal Gland 2 Pineal complex 2 Pineal organ 2 Rod Opsins 2 Secretory rudimentary photoreceptors 2 Species Specificity 2 Ultrastructure 2 anatomy and histology 2 animal 2 animal tissue 2 article 2 cell shape 2 cell ultrastructure 2 cytoplasm 2 ependyma cell 2 female 2 fish protein 2