Metazoa Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758
Count: -
   Phylum Nemertea Schultze, 1851 - ribbon worms
  Count: -
     Neonemertea Thollesson & Norenburg, 2003
    Count: -
       Pilidiophora Thollesson & Norenburg, 2003
      Count: 3f;10g;12s
         Heteronemertea see Order Heteronemertea
        Count: 2f;9g;11s
           Family Riseriellidae
          Count: 1g;1s
             Genus Riserius Norenburg, 1993
            Count: 1s
               1 Riserius pugetensis Norenburg, 1993
              Count: -