SYNOPSIS OF THE DESCRIBED IXODIDA OF THE WORLD
3/7/2005 
                                                         Recent        Fossil      Status
                                                      Gen.  Spec.    Gen.   Spec.
 
ORDER            Ixodida                               18     868      0       4 * 
SUPERFAMILY               Ixodoidea                    18     868      0       4 * 
FAMILY                      Argasidae                   4     181      0       2 * Complete
FAMILY                      Ixodidae                   13     686      0       2 * Complete
FAMILY                      Nuttalliellidae             1       1      0       0 * Complete