INDEX OF THE DESCRIBED ARTHROPODA OF THE WORLD
3/23/2006 
                                                         Recent        Fossil      Status
                                                      Gen.  Spec.    Gen.   Spec.
 
    PHYLUM Arthropoda                              109370 1052166  11635   53800 
 
      SUBPHYLUM Mandibulata                         97790  953708   8282   38042 
 
       Crustaceomorpha
 
        Crustacea                                    6763   40000   4500   30000
 
       Atelocerata
 
        Myriapoda                                    2274   13708     37      42
        Panhexapoda[INSECTS]                        88753 9000000  37459    8000
 
      SUBPHYLUM Marellomorpha                           0       0     12       0 
 
          CLASS Marellomorpha                           0       0     12       0 
 
      SUBPHYLUM Arachnomorpha                       11580   98458   3341   15745 
 
       Trilobita
 
          CLASS Trilobita                               0       0   2867   15000 
 
       Cheliceriformes
 
        Sidneyiida
 
          CLASS Sidneyiida                              0       0      1       1 
 
        Emeraldellida
 
          CLASS Emeraldellida                           0       0      1       1 
 
        Sanctacarida
 
          CLASS Sanctacarida                            0       0      1       1 
 
        Chelicerata
 
         Pycnogonida
 
          CLASS Pycnogonida                            89    1202      4       4 
 
         Aglaspidida
 
          CLASS Aglaspidida                             0       0      1       1 
 
         Euchelicerata
 
          CLASS Xiphosura                               3       5     61       0 
 
          CLASS Eurypterida                             0       0     71     110 
 
          CLASS Arachnida                           11488   97251    334     627