Esempi
Differently sized partners were seen stretching or contracting their body between the genital region and the clitellum .
The Polychaeta lack a clitellum and have parapodia, paddle-like appendages with numerous bristles or chaetae.
The two species display similar body length and segment number as well as show resemblance in the shape of the clitellum and tubercula pubertatis.
A histological examination of the clitellum revealed that damage occurred to both male and female gonads.
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