[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Annelida Lamarck, 1809 - segmented worms
     Class Polychaeta Grube, 1850 - polychaetes
       Family Capitellidae Grube, 1862
         Genus Pseudomastus Capaccioni-Azzati & Martin, 1992
           Pseudomastus deltaicus Capaccioni-Azzati & Martin, 1992