SYNOPSIS OF THE DESCRIBED SIPUNCULA OF THE WORLD
6/22/2006 
                                                         Recent        Fossil      Status
                                                      Gen.  Spec.    Gen.   Spec.
 
PHYLUM Sipuncula                                       17     142      4       3 Complete
 
CLASS      Phascolosomatidea                            6      45      0       0 Complete
 
ORDER            Aspidosiphonidormes                    3      22      0       0 Complete
 
ORDER            Phascolosomatiformes                   3      23      0       0 Complete
 
CLASS      Sipunculidea                                11      97      4       3 Complete
 
ORDER            Golfingiformes                         6      74      0       0 Complete
 
ORDER            Sipunculida                            5      23      4       3 Complete