Clitellum
Videos
The clitellum is a thickened glandular and non-segmented section of the body wall near the head in earthworms and leeches that secretes a viscid sac in which eggs are stored. It is located near the an
Earthworm with clitellum lablelled.
Close-up of the clitellum of a Lumbricus rubellus
Annelid
Videos
Annelids, also known as segmented worms, are animals that comprise the phylum Annelida. The phylum contains over 22,000 extant species, including ragworms, earthworms, and leeches. The species exist i
Clitellum
…that have special cells that secrete albumin into the worm's egg sac. The clitellum is part of the reproductive system of clitellates, a subgroup of annelids which contains oligochaetes (earthworms) and hirudineans (leeches). The clitellum is a thick, saddle-like ring found in the epidermis (skin) of the…
This sabellid tubeworm is budding
Burgessochaeta setigera
Phylogenetic tree of early lophophorates
Regenwurm 1