Gnathostomulida

Animalia - Gnathostomulida - Diagram of a representative body plan of a gnathostomulid.
biodidac.bio.uottawa.ca/thumbnails/filedet.htm?File_name=Gnat002b&File_type=gif

Phylum Gnathostomulida - Images of some members of this taxonomic group.
animaldiversity.ummz.umich.edu/site/accounts/pictures/Gnathostomulida.html

The Sand Worms (Phylum Gnathostomula) - Description of the tiny marine worms in this phylum and the characteristics that distinguish them from other worms.
www.earthlife.net/inverts/gnathostomula.html

The Taxonomicon: Phylum Gnathostomulida - List of published resources on the taxonomy of this phylum.
sn2000.taxonomy.nl/Taxonomicon/TaxonReferences.aspx?id=12887&tree=0.1&syn=1