Invertebrate animals of the phyla Annelida, Nematoda, Memertea, or Plathyhelminthes, that have long thin rounded or flat bodies without obvious appendages.
- Earthworms of North Dakota [More info]
- Species maps, aggregate map, earthworm diagram, species photos, and bibliography of earthworm species found in North Dakota
- Nonindigenous annelid distribution information [More info]
- Descriptions of annelids and examples of the deleterious effects of nonindigenous species, with links to distribution maps, species lists and related information on annelids.