Amphid

{{short description|Structure in nematode anatomy}} {{one source|date=March 2026}} '''Amphids''' (Greek: ''amphi'', around, double) are innervated invaginations of cuticle in nematodes. They are usually found in the anterior (head) region of the animal, at the base of the lips. Amphids are the principal olfactosensory organs of nematodes. Each amphid in ''C. elegans'' is made up of 12 sensory neurons with ciliated dendrites.<ref name="o094">{{cite journal | last1=Ekino | first1=Taisuke | last2=Shinya | first2=Ryoji | title=Ultrastructural Description of Amphid Neurons in the Pine Wood Nematode Indicates Concurrent Evolution of the Stylet and Specific Neurons | journal=Journal of Comparative Neurology | volume=533 | issue=11 | date=2025 | issn=0021-9967 | pmid=41221698 | pmc=12606542 | doi=10.1002/cne.70114 | url=https://onlinelibrary.wiley.com/doi/10.1002/cne.70114 | access-date=2026-03-01 | page=}}</ref> The neurons have multiple shapes, such as single cilium, double cilia, wing-like cilia, and dendrites embedded in the sheath-cell with villa.<ref name="o094"/> Other nematodes, such as ''Bursaphelenchus xylophilus'', have different configurations of specific types of neurons, with ''B. xylophilus''’ amphids having 13 neurons rather than 12.<ref name="o094"/>

== References == {{Reflist}}

Category:Nematode anatomy Category:Invertebrate nervous system