title: [Ultrastructure of the "rudimentary secretory photoreceptors" (RSP) of the embryonic pineal body of Lacerta vivipara J. (Reptilia, Lacertilia) and the origin of the RSP of Sauropsida].
abstract: The "secretory rudimentary photoreceptor-cells" of Lacerta vivipara J., during embryonic stages, exhibit photosensory differentiations (disks). Our ontogenetic observations agree with the phylogenetic studies and support the concept of a "sensory cell line" (Colin, 1969) in the pineal organ of vertebrates.
mesh_terms: D000818:Animals; D008116:Lizards / Q000196:embryology*; D008854:Microscopy, Electron; D010786:Photoreceptor Cells / Q000196:embryology / Q000648:ultrastructure; D010870:Pineal Gland / Q000196:embryology* / Q000648:ultrastructure
vernacular_title: Ultrastrucutre des "photorécepteurs rudimentaires sécrétoires" dans l'épiphyse de l'embryon âgé de Lacerta vivipara J. (Reptile, Lacertilien) et origine des P.R.S. des sauropsidés