Nuchal organ

The nuchal organ is a ciliated pit^[1] or groove present at the posterior end of the prostomium of annelid worms,^[1] some cephalopods,^[2] and other invertebrates.^[3]

Annelids only possess one nuchal organ, although the nature of the grooving may make it appear to be a pair of organs.^[4]

It may be involved in light detection,^[2] and may have a role in food detection and mating.^[5]

References

↑ ^1.0 ^1.1 ^1.2 Hessling, R.; Purschke, Günter (23 October 2000). "Immunohistochemical (cLSM) and ultrastructural analysis of the central nervous system and sense organs in Aeolosoma hemprichi (Annelida, Aeolosomatidae)". Zoomorphology 120 (2): 65–78. doi:10.1007/s004350000022.
↑ ^2.0 ^2.1 Parry, Matthew (October 2000). "A description of the nuchal organ, a possible photoreceptor, in Euprymna scolopes and other cephalopods". Journal of Zoology 252 (2): 163–177. doi:10.1111/j.1469-7998.2000.tb00612.x.
↑ Peñalva-Arana, Carolina D.; Manca, Marina (1 August 2007). "An SEM study of the nuchal organ in Daphnia himalaya (nov. sp.) embryos and neonates collected from the Khumbu region (Nepalese Himalayas)". Journal of Limnology 66 (2): 153. doi:10.4081/jlimnol.2007.153. http://puma.isti.cnr.it/rmydownload.php?filename=cnr.ise/cnr.ise/2007-A0-028/2007-A0-028_0.pdf.
↑ Purschke, G.; Wolfrath, F.; Westheide, W. (21 March 1997). "Ultrastructure of the nuchal organ and cerebral organ in Onchnesoma squamatum (Sipuncula, Phascolionidae)". Zoomorphology 117 (1): 23–31. doi:10.1007/s004350050026.
↑ Schlötzer-Schrehardt, U. (December 1986). "Ultrastructural investigation of the nuchal organs of Pygospio elegans (Polychaeta). I. Larval nuchal organs". Helgoländer Meeresuntersuchungen 40 (4): 397–417. doi:10.1007/BF01983820.

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[Hessling2000-1] 1.0 ^1.1 ^1.2 Hessling, R.; Purschke, Günter (23 October 2000). "Immunohistochemical (cLSM) and ultrastructural analysis of the central nervous system and sense organs in Aeolosoma hemprichi (Annelida, Aeolosomatidae)". Zoomorphology 120 (2): 65–78. doi:10.1007/s004350000022.

[Parry2000-2] 2.0 ^2.1 Parry, Matthew (October 2000). "A description of the nuchal organ, a possible photoreceptor, in Euprymna scolopes and other cephalopods". Journal of Zoology 252 (2): 163–177. doi:10.1111/j.1469-7998.2000.tb00612.x.

[3] Peñalva-Arana, Carolina D.; Manca, Marina (1 August 2007). "An SEM study of the nuchal organ in Daphnia himalaya (nov. sp.) embryos and neonates collected from the Khumbu region (Nepalese Himalayas)". Journal of Limnology 66 (2): 153. doi:10.4081/jlimnol.2007.153. http://puma.isti.cnr.it/rmydownload.php?filename=cnr.ise/cnr.ise/2007-A0-028/2007-A0-028_0.pdf.

[4] Purschke, G.; Wolfrath, F.; Westheide, W. (21 March 1997). "Ultrastructure of the nuchal organ and cerebral organ in Onchnesoma squamatum (Sipuncula, Phascolionidae)". Zoomorphology 117 (1): 23–31. doi:10.1007/s004350050026.

[5] Schlötzer-Schrehardt, U. (December 1986). "Ultrastructural investigation of the nuchal organs of Pygospio elegans (Polychaeta). I. Larval nuchal organs". Helgoländer Meeresuntersuchungen 40 (4): 397–417. doi:10.1007/BF01983820.

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Nuchal organ

Topic: Biology

References