clitellum

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clitellum

[klə′tel·əm]
(invertebrate zoology)
The thickened, glandular, saddlelike portion of the body wall of some annelid worms.
References in periodicals archive ?
These collagenous matrices are likely transient structures associated with reproduction, based on their absence in clitella of immature specimens or midbody segments.
However, previous reports have shown the evidence that in earthworm systematics, reproductive organs including the clitella, male pores, female pores, testes, ovaries, spermathecae, and prostate glands are believed to be less affected by environmental influences through time and are evolutionarily more conservative (Gates, 1972; Blakemore, 2002).
The fine edge of a flamed pair of dissecting scissors was inserted into the ventral surface at the region of the clitella and with the body wall slightly raised up with the scissors; an incision was made longitudinally along the earthworm.