An ossified element investing the upper eyelid. [ http://www.ncbi.nlm.nih.gov/pubmed/16496288 http://en.wikipedia.org/wiki/Palpebral_(bone) ]
Term information
The most extreme development of the palpebral is found in the armored dino- saur Euoplocephalus tutus, where the bone forms a quarter-sphere and adducts to completely occlude the or- bit (Coombs, 1972; Vickaryous and Russell, 2003). Notwithstanding the superficially similar position, palpe- brals and tarsal plates differ both anatomically and developmentally and are not considered homologous (Gauthier et al., 1988)
Term relations
- bone element
- skeletal element of eye region
- facial bone
- part of some upper eyelid
- in taxon some Sauropsida