Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Chaetognatha Leuckart, 1854 - chaetognaths
     Order Aphragmophora Tokioka, 1965
       1 Family Sagittidae Claus & Groben, 1905
       2 Family Pterosagittidae Tokioka, 1965
       3 Family Bathybelidae Bieri, 1989
       4 Family Krohnittellidae Bieri, 1989
       5 Family Krohnittidae Tokioka, 1965