SYNOPSIS OF THE DESCRIBED MERMITHIDA OF THE WORLD
7/8/2007 
                                                         Recent        Fossil      Status
                                                      Gen.  Spec.    Gen.   Spec.
 
ORDER            Mermithida                           113     604      2      10   Complete
SUPERFAMILY               Mermithoidea                118     610      2      10   Complete
FAMILY                      Mermithidae               100     588      2      10   * Complete
FAMILY                      Tetradonematidae           13      16      0       0   Complete