class
Horseshoe Crabs
Merostomata
Field notes
Merostomata is a class of chelicerate arthropods that contains the extinct Eurypterida (sea scorpions) and the extant Xiphosura (horseshoe crabs). The term was originally used by James Dwight Dana to refer to Xiphosura only, but was emended by Henry Woodward to cover both groups.
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Range
Greener is more native, amber more introduced; paler is less certain. How this was decided
Most observed native horseshoe crabs All
Native to the US, by observations.
