Merostomata

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Merostomata
Eurypterus Smithsonian.jpg
Reconstruction o Eurypterus (Eurypterida)
Limulus polyphemus.jpg
Five views o Limulus polyphemus (Xiphosura)
Scienteefic classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Merostomata
Woodward, 1866
Orders

Merostomata is the name gien tae a groupin o the extinct Eurypterida (sea scorpions) an the Xiphosura (horseshoe crabs).