Assertion: leech | /r/PartOf | the class clitellata
Facets:
value: along with earthworms
type: OTHER
value: because of the presence of a clitellum
type: CAUSE
Source sentences:
text: They belong to the Class Clitellata (along with earthworms, Subclass Oligochaeta) because of the presence of a clitellum, which is a swelling towards the head of the animal, where the gonads are located.