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Clitellum (Figs 2, 3): Brownish grey; saddle-shaped, clearly segmented, on V414--28); ventral borders terminate parallel to dorsal edges of tubercula pubertatis.
zulu Specimens One clitellate; Only one, with and their one with clitellum not maturity developing fully developed tubercula pubertatis Characters Length Large, 185 mm abscised Diameter 12 mm 9-11 mm Prostomium Not observed Epilobous, short, broad Number of Abscised, 135 segments not observed Setae Minute, Minute, only difficult to on some segments, detect closely paired Annulation Not described; 4(?
The clitellum of a fertilised earthworm excretes the mucus used to produce the cocoons.
Chaetae before clitellum by 3-4(5), backwards by 2-3, straight or slightly bent, tapering, sharp-tipped, 28-84 (most often 40-50) [micro]m long (Fig.
The clitellum of Rhinodrilus priollii specimens was pronounced in mature individuals (up to ~3 cm in diameter), forming a saddle-like structure around the dorso-lateral aspect of the worm.
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.
The clitellum is a reproductive structure characteristic of the oligochaetes, that matures as a secondary sexual gland (Ruppert & Barnes, 1996).
Juveniles were distinguished from adults by size and the absence of a clitellum, and the adults identified.
Benham (1886a: 216, 219, 242, 1886c: 100) debated Beddard's omission of Tritogenia sulcata from the 'Microchaeta' (with no conclusion concerning its generic status mentioned), also Perrier's correction of Kinberg's 'six setae per segment' to eight setae, and commented on the absence of the clitellum in Tritogenia.
Clitellum saddle-shaped, on 13-21; segmented, dorsal borders well marked.
Holotype: Preserved length 1450 mm, diameter after clitellum 15 mm (Fig.
Clitellum slightly resembling this of amphius, although on various individuals it was variably developed, unequally encircling segments ventrally.
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