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About 90% of nematodes reside in the top 15 cm (6") of soil. Nematodes do not decompose organic matter, but, instead, are parasitic and free-living organisms that feed on living material. Nematodes can effectively regulate bacterial population and community composition—they may eat up to 5,000 bacteria per minute.
In nematodes, the gubernaculum is a hardened or sclerotized structure in the wall that guides the protrusion of the spicule during copulation. [1] For example, in Caenorhabditis elegans , spicules serve to open and dilate the vagina of the hermaphrodite and the gubernaculum is a grooved plate in which the spicules move; the gubernaculum is ...
The term ‘alae’ is the plural of ala (wing), describing either one of the pair of ridges that forms on a nematode or an individual crease found on an individual ridge. The term ‘ala’ is rarely used in describing the alae and scientific journals use the term ‘alae’ both singularly and in the plural.
Phasmids are sensilla in the lateral tail region of certain species of nematodes. [1] They are similar in their structure to amphid sensilla, but smaller. [2] [3]: 154 One classification system for nematodes places nematodes with phasmids into class Secernentea and nematodes without phasmids into class Adenophorea.
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The stichosome is composed by very visible cells in Trichosomoides crassicauda. A stichosome (from Greek stichos (στίχος) = row; soma (σῶμα) = body) is a multicellular organ that is very prominent in some species of nematodes and consists of a longitudinal series of glandular unicellular cells (stichocytes) arranged in a row along the oesophagus that forms the posterior esophageal ...
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 is made up of 12 sensory neurons with ciliated dendrites.
Nematology research, like most fields of science, has its foundations in observations and the recording of these observations. The earliest written account of a nematode "sighting," as it were, may be found in the Pentateuch of the Old Testament in the Bible, in the Fourth Book of Moses called Numbers: "And the Lord sent fiery serpents among the people, and they bit the people; and much people ...