Periproct

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The periproct is the final body segment in annelid worms. The anus is located on this segment.[1] The term also refers to the small region surrounding the anus of the sea urchin.[2]

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References[edit]

  1. ^ Sims, R and Gerard, B (1985). Earthworms: Keys and Notes for the Identification and Study of the Species. London: Published for The Linnean Society of London and the Estuarine and Brackish-Water Sciences Association by E. J. Brill/Dr. W. Backhuys. p. 3. 
  2. ^ Fox, Richard. "Invertebrate Anatomy OnLine". Lander University. Retrieved May 13, 2012.