Most are hermaphroditic, although the polychaetes can hatch from eggs into trocophore larvae or reproduce asexually through budding.
This phylum can be dated to the Cambrian period where the Canadia genus has been found in the burgess shale of British Columbia. Some, such as the myzostomarians, are parasitic, and the polychaetes and oligochaetes digest soil and are important for sediment aeration. Most are hermaphroditic, although the polychaetes can hatch from eggs into trocophore larvae or reproduce asexually through budding. FTP, name this phylum of animals sometimes called segmented worms, which includes leeches and earthworms.
This phylum can be dated to the Cambrian period where the Canadia genus has been found in the burgess shale of British Columbia.
{Annelid}a