Pronunciation: [tˈɛlsənz] (IPA) 
The word "Telsons" is spelled with a "t" and "s" at the beginning and end respectively. The vowel sound is represented by the letter "e" before the "l". The stress is on the second syllable, as indicated by the apostrophe. In IPA transcription, this word can be represented as /ˈtɛlsənz/, with the stress symbol before the second syllable. "Telsons" refers to the tail end of some arthropods, such as lobsters or scorpions.
Telsons are an anatomical structure found in certain arthropods, specifically in the order of crustaceans known as Decapoda. Also known as the telson segment, it is located at the posterior end of the body and is considered part of the tail.
The telson is typically the most posterior division of the last body segment, called the pleotelson. It is characterized by being flattened and elongated, often resembling a paddle or a spear. In some species, the telson may have additional features such as spines or serrated edges.
Functionally, the telson serves several important purposes. One of its main roles is facilitating locomotion by acting as a rudder or tail fan. It aids in steering and propelling the arthropod through water. The telson also plays a crucial role in defense, as it can be used to deliver a stinging or grasping action. In certain species, the telson may contain venom glands or specialized appendages for clamping onto prey or warding off predators.
It is important to note that telsons are particularly well-developed in certain groups of crustaceans, such as lobsters, crabs, and scorpions. While the form and function of telsons may vary across species, they represent a distinctive feature of the arthropod body plan.
The word "telsons" derives from the Old English word "tælsne", which later evolved into "tælsan", meaning "to cut off" or "to amputate". Over time, the term "telsons" emerged, referring specifically to the part of an arthropod's abdomen that is typically modified or divided into two appendages. The etymology highlights the original meaning of severing or amputating, which relates to the structure's distinct function in arthropods.
