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Title: Uropod  
Author: World Heritage Encyclopedia
Language: English
Subject: Shrimp, Dendrobranchiata, Appendage, Telson, Valvifera
Collection: Crustacean Anatomy
Publisher: World Heritage Encyclopedia


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.


Uropods are often defined as the appendages of the last body segment of a crustacean.[1] An alternative definition suggested by Frederick R. Schram restricts the term to those structures arising from the segment before the anal segment (the segment which carries the anus).[1] Under this latter definition, the appendages of the anal segment are caudal rami, which are analogous to uropods.[1]


Uropods are typically biramous – comprising an endopod and an exopod. The exopod is typically the larger, and may be divided in two by a transverse suture known as the diaeresis.[2][3] The uropods may work in concert with the telson to form a "tail fan".[4]


  1. ^ a b c Claude Meisch (2007). Renate Matzke-Karasz, Koen Martens & Michael Schudack, ed. "Ostracodology – Linking Bio- and Geosciences: Proceedings of the 15th International Symposium on Ostracoda, Berlin, 2005".  
  2. ^ Dean Pentscheff (ed.). "Diaeresis". Crustacea Glossary.  
  3. ^ S. S. Lal (2009). "Palaemon malcolmsonii". Practical Zoology: Invertebrate.  
  4. ^ Dean Pentscheff (ed.). "Uropod". Crustacea Glossary.  
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