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Cirrus (biology)

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Title: Cirrus (biology)  
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Subject: Biological nomenclature, Alloblennius anuchalis, Crinoid, Axostyle, Lorica (biology)
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Cirrus (biology)

Adult female roughhead blenny with supraorbital cirri

A cirrus (pronounced , "", plural cirri, , ""), from the Latin cirrus meaning a curl-like tuft or fringe, is a term used in biology and zoology for a number of long, thin structures in both vertebrate and invertebrate animals. In the [3] Among feather stars or barnacles, a cirrus is a long slender gripping or feeding appendage.[4] In sea lillies, the cirri are the thin strands that line the animal's stalk. Among the tube blennies, a cirrus is a term for a long growth extending from above the eye (a supraorbital cirrus) or extending below the neck-region (a nuchal cirrus).[5] In a nautilus, each of the animal's tentacles is composed of a thin flexible cirrus and the corresponding hardened and protective cirrus sheath into which the cirri may be withdrawn.[6]


  1. ^ a b R. L. Kotpal (2012). Modern Text Book of Zoology: Invertebrates. Rastogi. pp. 341–343.  
  2. ^ Edward E. Ruppert (1988). Seashore Animals of the Southeast: A Guide to Common Shallow- Water Invertebrates of the Southeastern Atlantic Coast. Univ of South Carolina. p. 359.  
  3. ^ Beesley, Pamela L.; Ross, Graham J.B.; Glasby, Christopher J., eds. (2000). Polychaetes and Allies: The Southern Synthesis. Collingwood, Australia: Csiro. p. 404.  
  4. ^ George M. Branch, C. l. Griffiths, M. L. Branch, L. E. Beckley (1 March 2008). Two Oceans: A Guide to the Marine Life of Southern Africa. Struik. p. 350.  
  5. ^ John D. McEachran; Janice D. Fechhelm (2 January 2006). Fishes of the Gulf of Mexico, Volume 2: Scorpaeniformes to Tetraodontiformes. University of Texas. p. 610.  
  6. ^ Roger T. Hanlon; John B. Messenger (13 August 1998). Cephalopod Behaviour. Cambridge University. p. 172.  
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