Phalangite

Phalangite is a term used to describe a type of finger-like projection found in various organisms, particularly in the context of marine biology. These structures are typically found on the body of marine invertebrates, such as sea stars, sea urchins, and some types of worms. Phalangites serve multiple functions, including locomotion, feeding, and defense. In sea stars, for example, phalangites are part of the ambulacral system, which is used for movement and feeding. In sea urchins, they are part of the tube feet system, which helps in locomotion and feeding. The term "phalangite" is derived from the Greek word "phalangos," meaning "finger," reflecting their shape and function. Phalangites are a fascinating example of convergent evolution, as similar structures have evolved independently in different groups of animals.