The epidermis is attached to the dermis by tiny longitudinal grooves called matrix crests ("cristae matricis unguis").
One of these plates makes up the hooked portion of the upper bill, called the maxillary unguis.
The claw grows outward from the nail matrix at the base of the unguis and the subunguis grows thicker while travelling across the nail bed.
The petrels have a hooked bill called the maxillary unguis which can hold slippery food.
On the pretarsus most insects have a pair of claws unguis, plural ungues.
Cats are often seen working old unguis layers off on wood or on boards made for the purpose.
There is a single pulvillus below each unguis.
The unguis is the harder external layer, which consists of keratin fibers arranged perpendicular to the direction of growth and in layers at an oblique angle.
