clitellum


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clitellum

(klī-tĕl′əm)
n. pl. cli·tella (-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.

clitellum

a saddle-like structure present around part of the anterior half of some ANNELID worms which contains glands that secrete mucus, forming a sheath round copulating animals and a cocoon round the eggs.
References in periodicals archive ?
Under the treatments of nitenpyram the total amount Of protein were estimated as 38.8 [+ or -] 0.46, 48.1 [+ or -] 0.18 and 39.0 [+ or -] 0.46 mg/mL to respective regions as peristomium, clitellum and abdomen in the earthworms Pheretima posthuma (Table 1).
Under the exposures of spinetoram total protein content found to be 30.8 [+ or -] 0.35, 34.0 [+ or -] 0.22 and 44.5 [+ or -] 0.28 mg/mL to respective regions as peristomium, clitellum and abdomen in the earthworms Pheretima posthuma (Table 2).
Clitellum not yet developed; genital marks not seen (absent or not developed?).
Secondary furrows mainly in faint clitellum and post-clitellum regions.
Body wall thin and transparent, both epidermis and longitudinal musculature 7-9 [micro]m thick; in prostomium and clitellum epidermis is thicker.
This pattern indicates an increase in protein contents in the clitellum region, a decrease in head region and almost unaffected protein contents was found in the abdominal regions under the effects of imidacloprid on earthworms.
Eisenia foetida belongs to the Phylum Annelida, Class Oligochaeta, is hermaphrodite and fertilizes its eggs inside a quitinous cocoon secreted by the clitellum. The gonadal segments are located in the anterior portion of the worm, between the metameres IX and XV.
crassa, which was described on a single, not fully mature specimen with no clitellum, having two pairs of nephridia per segment, with the gizzard in segment 7(!), and a single dorsal blood vessel.
priollii in central Amazonia, and examine cellular and morphological aspects of its atypically large clitellum.
Clitellum annular or saddle-shaped (juvenile?), tubercula pubertatis absent.
Clitellum slightly resembling this of amphius, although on various individuals it was variably developed, unequally encircling segments ventrally.