Periproct

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Inner calcareous skeleton of a regular sea urchin. The periproct is on the top around the anal opening.

The Periprokt or Periproct derived from the Greek peri = "around about" and proctos = "After", or after field referred to in the Zoology principle, a field in which the located After situated.

In the case of insects , it is the telson , the last (fake) segment of the abdomen . It is also referred to here as the anus segment or as an end ring, as it usually only forms a ring around the anus made of chitin . The epiproct of the insect often bears three small sclerites , which are called laminae anales.

In sea ​​urchins , the epiproct or anal field is formed from several, irregularly arranged limestone plates.

supporting documents

  1. ↑ a b c periproct. In: Herder-Lexikon der Biologie. Spektrum Akademischer Verlag, Heidelberg 2003, ISBN 3-8274-0354-5 .