vertebrates Lamarck, 1801 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
   Class †Pteraspidomorphi Goodrich, 1909 see Class Pteraspidomorpha
     Subclass †Heterostraci Lankester, 1868
       Order †Cyathaspidiformes Kiaer, 1930
         Family †Poraspididae Kiaer, 1932 see Subfamily Poraspidinae Denison, 1964
           Genus †Poraspis Kiaer, 1930
             01 †Poraspis sericeaᵀ (Lankester, 1873)
             02 †Poraspis sturi (Alth, 1874)
             03 †Poraspis pompeckji (Brotzen, 1933)
             04 †Poraspis simplex (Brotzen, 1933)
             05 †Poraspis siemiradzkii (Zych, 1931)
             06 †Poraspis polaris Kiaer, 1930
             07 †Poraspis brevis Kiaer & Heintz, 1935
             08 †Poraspis rostrata Kiaer & Heintz, 1935
             09 †Poraspis barroisi (Leriche, 1906)
             10 †Poraspis heintzae Elliott, Loeffler & Liu, 1998
             11 †Poraspis cracens Elliott, Loeffler & Liu, 1998
             12 †Poraspis thules Elliott, Loeffler & Liu, 1998
             13 †Poraspis parmula Elliott, Loeffler & Liu, 1998