Merostomata
A Merostomata san en klas faan Laspuateten (Arthropoda) an nai mä a Koonkern (Arachnida). A wedenskaplidj san daalang ei muar ians, wäär jo en aanj klas san. Uun detdiar klas as man ian order Xiphosura mä man ian famile Limulidae.

Iindialang 
 Order: Xiphosura
 Onerordern: Xiphosurida – †Synziphosurida
 Infraordern: Limulina - †Bellinurina
 Familin: Limulidae - †Austrolimulidae - †Moravuridae - †Paleolimulidae - †Rolfeiidae
 Sköölen: Carcinoscorpius – Limulus – Tachypleus – †Crenatolimulus – †Mesolimulus

Luke uk diar 

Laspuateten