腿たい口こう類るい

noun

Merostomata

A taxonomic class of aquatic chelicerate arthropods, including extinct sea scorpions (Eurypterida) and extant horseshoe crabs (Xiphosura). Used in biological and paleontological contexts.

• 腿たい口こう類るいにはカブトガニやウミサソリが含ふくまれる。

  Merostomata includes horseshoe crabs and sea scorpions.