Jisho

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Wikipedia definition
1. MerostomataMerostomata is the name given to a grouping of the extinct Eurypterida (sea scorpions) and the 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.
Read “Merostomata” on English Wikipedia
Read “カブトガニ綱” on Japanese Wikipedia
Read “Merostomata” on DBpedia

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