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An earthworm is a soil-dwelling terrestrial invertebrate that belongs to the phylum Annelida.The term is the common name for the largest members of the class (or subclass, depending on the author) Oligochaeta.In classical systems, they were in the order of Opisthopora since the male pores opened posterior to the female pores, although the internal male segments are anterior to the female.
Earthworm Profile. The earthworm is one of the most important creatures on earth and one that engineers the very foundations of the ecology we live in. They’re slimy, wriggly, subterranean critters, but they do more for us than we realise! Earthworms literally produce fertile soil from their back ends!
Feb 7, 2006 · Earthworm, is a segmented worm of phylum Annelida, class Oligochaeta.The class comprises some 14 families, including Lumbricidae, to which the common earthworm (Lumbricus terrestris) belongs.Earthworms are separated from other oligochaetes by a combination of characteristics, including 8 setae per segment; multicellular clitellum; small eggs without yolks; 2 pairs of testes and one pair of ...
Named "Dave" by its discoverers, it is 15.75 inches long and weighs as much as a small chocolate bar. Its size is unusual because earthworms have many predators and normally do not survive in the ...
Although native to Europe, earthworms are found throughout North America and western Asia. They do not live in deserts or regions where there is permafrost or permanent snow and ice. Typically only a few inches (7 or 8 centimeters) long, some members of this species have been known to grow to a snakelike 14 inches (35 centimeters). Earthworms' bodies are made up of ringlike segments called annuli.
Jul 5, 2024 · The earthworm body is divided into ringlike segments (as many as 150 in L. terrestris).Some internal organs, including the excretory organs, are duplicated in each segment. Between segments 32 and 37 is the clitellum, a slightly bulged, discoloured organ that produces a cocoon for enclosing the earthworm’s eggs.The body is tapered at both ends, with the tail end the blunter of the two.
EarthWorms (Lumbricus terrestris) Earth Worm Characteristics. Earthworms are made up of many small segments known as ‘annuli’. These annuli are ridged and covered in minute hairs that grip the soil allowing the worm to move as it contracts its muscles.
Home Animals Annelids Earthworm: Characteristics, Diet, Facts & More [Fact Sheet]. Earthworms, often unnoticed and undervalued, are essential architects of our ecosystem. These seemingly humble creatures play a pivotal role in enhancing soil fertility and maintaining the delicate balance of our environment.
Description. Earthworms are harmless, often beneficial residents of the soil. Earthworms breakdown dead and decaying organic matter into rich humus soil, thereby supporting plant growth.
Introduction to the Earthworms. Unidentified earthworm species, photo by Diane Williamson.. by John W. Reynolds Oligochaetology Laboratory Kitchener, Ontario Canada N2A 2X8
