Uropod

For the hind part of mammalian leukocytes, see Uropod (immunology).
The tail of Nephrops norvegicus – the uropods flank the telson; a diaeresis is visible on the exopod (outer part) of each uropod.

Uropods are posterior appendages found on a wide variety of crustaceans. They typically have functions in locomotion.