Annelid
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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
This sabellid tubeworm is budding
Burgessochaeta setigera
Phylogenetic tree of early lophophorates
Regenwurm 1
Earthworm
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An earthworm is a soil-dwelling terrestrial invertebrate that belongs to the phylum Annelida. The term is the common name for the largest members of the class Oligochaeta. In classical systems, they w
Annelid
…are animals that comprise the phylum Annelida (; from Latin anellus 'little ring'). The phylum contains over 22,000 extant species, including ragworms, earthworms, and leeches. The species exist in and have adapted to various ecologies – some in marine environments as distinct as tidal zones and hydrothermal…
Eisenia foetida R.H.
A profile SEM image of Lumbricus terrestris setae, small bristle-like projections that facilitate movement by anchoring the earthworm in the soil.
Earthworm copulation
Earthworm cocoons from L. terrestris. Weigh approximately 28 mg each.