TY  - JOUR
T1  - The Parietal Eye in Reptile, Chalcides Ocellatus: An Embryological and Histological Study
AU - Lipari, L. AU - Gerbino, A. AU - Farina, E. AU - Carini, F. AU - Lipari, A. 
JO  - Veterinary Research
VL  - 8
IS  - 3
SP  - 27
EP  - 31
PY  - 2015
DA  - 2001/08/19
SN  - 1993-5412
DO  - vr.2015.27.31
UR  - https://makhillpublications.co/view-article.php?doi=vr.2015.27.31
KW  - Parietal eye
KW  -epiphysis
KW  -reptiles
KW  -development
KW  -radial cells
AB  - The Parietal Eye (PE) is present in the
amphibian and reptilian, by contrast PE is lost in the bird
and mammaliam. PE is a part of the pineal complex and
still it is dubious the its embryological origin. This study
on the a reptilian Chalcides ocellatus shows that the PE
originates from the a single vesicle; early the apical part
of the vesicle differentiates into PE and successively lost
the connection with the basal part of vesicle that
differentiates into epiphysis. Histological structure PE
differentiates into lens with elongated cells and retina
with the photoreceptors or sensitive, radial cells, ganglion
cells from which the nerve originates and pigment cells.
Both the different development and histological
architecture than the lateral eye suggest that the function
of PE is limited to the perception of light and heat
intensity since the pigment migrates according to different
light and thermal conditions.
ER  -