thin keratinized layer of epidermis projecting from outer surface of beak[WP]. [ http://en.wikipedia.org/wiki/Beak#Rhamphotheca ]

This is just here as a test because I lose it

Term information

development notes

This covering arises from the Malpighian cells of the bird's epidermis,[9] growing from plates at the base of each mandible

has related synonym

horny sheath of beak

outer keratin layer of beak

id

UBERON:0007330