life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   crustaceomorphs see [unranked] Crustaceomorpha Chernyshev, 1960
     1 Genus †Cambrocaris Walossek & Szaniawski, 1991
     2.1.1.1.1 Genus †Canadaspis Novozhilov, in Orlov, 1960
     2.1.1.1.2 Genus †Odaraia Walcott, 1912
     2.1.1.2 Genus †Branchiocaris Briggs, 1976
     2.1.2 Genus †Marrella Walcott, 1912 - lace crab
     2.2.1.1 Genus †Goticaris Walossek & Müller, 1990
     2.2.1.2 Genus †Cambropachycope Walossek & Müller, 1990
     2.2.2.1 Genus †Martinssonia Müller & Walossek, 1986
     2.2.2.2.1 Genus †Henningsmoenicaris Walossek & Müller, 1991
     2.2.2.2.2.1 †Phosphatocopina Müller, 1964 see Order Phosphatocopida Müller, 1964
     2.2.2.2.2.2.1.1.1 Mystacocarida see Subclass Mystacocarida Pennak & Zinn, 1943
     2.2.2.2.2.2.1.1.2 Branchiura Thorell, 1864 see Subclass Branchiura Thorell, 1864
     2.2.2.2.2.2.1.2 Genus †Skara Muller, 1983
     2.2.2.2.2.2.2.1 Genus †Bredocaris Müller, 1983
     2.2.2.2.2.2.2.2.1 Pancrustacea Zrzavý et al., 1997 see Subphylum Pancrustacea Zrzavý et al., 1997
     2.2.2.2.2.2.2.2.2 Eucrustacea Kingsley, 1894