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The annelids (/ ˈ æ n ə l ɪ d z /), also ... Asexual reproduction in oligochaetes is always by dividing into two or more pieces, rather than by budding. [12] [42] ...
Aeolosoma is a genus of minute annelid worms, variously attributed either to oligochaetes or polychaetes. [2] Unlike most polychaetes, they reside in freshwater environments in various parts of the world. Aeolosoma are transparent worms, very thin and of the length of 1.5–2 mm. [3] They usually reproduce asexually. [4]
Lamellibrachia luymesi is a cold seep tube worm that reaches lengths of over 3 m and may be the most long-lived annelid, being over 250 years old. A still unclassified multilegged predatory polychaete worm was identified only by observation from the underwater vehicle Nereus at the bottom of the Challenger Deep , the greatest depth in the ...
Clitellate annelids are segmented worms characterised by the clitellum or girdle which is located near the head end of mature individuals. ... During reproduction ...
Oligochaeta (/ ˌ ɒ l ɪ ɡ ə ˈ k iː t ə,-ɡ oʊ-/) [1] is a subclass of soft-bodied animals in the phylum Annelida, which is made up of many types of aquatic and terrestrial worms, including all of the various earthworms.
Alitta succinea (known as the pile worm, clam worm or cinder worm) [3] is a species of marine annelid in the family Nereididae (commonly known as ragworms or sandworms). [4] It has been recorded throughout the North West Atlantic, as well as in the Gulf of Maine and South Africa. [2]
This process of synchronous reproduction in the form of a swarm is known as epitoky. During this process, there is no actual male to female contact. The reproductive swarm is ejected into open water. Cells that fuse during fertilisation are spawned through an excretory gland (metanephridia) or by the main worm body-wall rupturing. [35]
In leeches, the clitellum appears during mating season, where it is used for both sexual reproduction and the secretion of a cocoon for the eggs. [4] Its color is usually slightly lighter than that of the body of the annelid. Occasionally, living segments of the worm will be shed with the clitellum.