Order Summary for Xiphosura

  Main Ref.
:
  Order
:
Xiphosura horseshoe crabs
  Class
:
Merostomata
  Sister Order
:
  M years
  Ref.
:
 | 
  First Fossil Record
:
  Occurs in
:
Marine
Fresh
Brackish
  Remark
:
  Class etymology
:
  Order etymology
:
  Families
:
( n = ) -
Limulidae

Ref.
[ e.g. 3742]                  
Glossary
                      [ e.g. cnidaria]