Metazoa Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758
   Phylum Nemertea Schultze, 1851 - ribbon worms
     Neonemertea Thollesson & Norenburg, 2003
       Pilidiophora Thollesson & Norenburg, 2003
         Heteronemertea see Order Heteronemertea
           Family Lineidae McIntosh, 1874
             1 Genus Notospermus Huschke, 1830
             2.1.1 Genus Micrura Ehrenberg, 1831
             2.1.2.1 Genus Tenuilineus Riser, 1993
             2.1.2.2 Lineus alborostratus Takakura, 1898
             2.2.1.1 Lineus viridis (O.F. Müller, 1774)
             2.2.1.2.1 Genus Ramphogordius Rathke, 1843
             2.2.1.2.2 Genus Lineusᵀ Sowerby, 1805
             2.2.2.1.1 Genus Parvicirrus Riser, 1993
             2.2.2.1.2 Genus Parborlasia Friedrich, 1970
             2.2.2.2 Genus Cerebratulus Renier, 1804