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of an earthworm


n. pl. cli·tel·la (-tĕl′ə)
A glandular swelling of the epidermis of certain annelid worms, such as earthworms, that secretes a viscous fluid to form a cocoon in which the eggs are deposited.

[New Latin clītellum, sing. of Latin clītellae, packsaddle; see klei- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -la (-lə)
(Zoology) a thickened saddle-like region of epidermis in earthworms and leeches whose secretions bind copulating worms together and later form a cocoon around the eggs
[C19: from New Latin, from Latin clītellae (plural) packsaddle]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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References in periodicals archive ?
Although mature earthworms are easily distinguished from the immature ones by the presence of a clitellum, which differs between the two species in its specific position on body segments, immature individuals can be indistinguishable (Hale, 2013).
The anterior of the body has peristomium, fewer segments are made a thick band called as clitellum and remaining of body after clitellum is called as abdomen.
Clitellum yellow-orange in 13-16, 17 only dorsally, saddle-shaped without reaching ventral setae and covering setae cd (Fig.
Known as regeneration, the front part must be long enough to contain the clitellum (the thicker, sort of girdle part) and at least 10 segments behind the clitellum, which normally makes up about half the length of the worm.
foetida were collected and then divided into three groups namely hatchlings' juveniles' and adults' based on their body lengths and weights (wet basis) and stages of clitellum development.
Like the oligochaeta, they share the presence of a clitellum. Like earthworms, leeches are hermaphrodites.
1) and described as 'more fully mature than the other', abscised behind the clitellum, with a total segment number reaching ca 86, presently designated as a lectotype of Tritogenia zuluensis (Beddard, 1907) (NHMU Oslo C5726, Figs 2, 3).
torquata, this species is larger and lacks a characteristic white clitellum. This species inhabits the northern oligotrophic part of the Chivyrkuy Gulf (Figure 1: transect 3).
Clitellum in XII-XIII, thick, with dense gland cells located either irregularly or in obscure transversal rows; lacking between the male pores.
The experts say that the front half of an earthworm can regenerate its back half if the front part is long enough to contain the clitellum (the swollen band about one-third of the way from the worm's head) and includes at least 10 segments behind it.