class merostomata

English Thesaurus

1. used in some classifications; includes the orders Xiphosura and Eurypterida (noun.animal)

hypernym	:	arthropod,
definition	:	invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin (noun.animal)

member holonym	:	order xiphosura, xiphosura,
definition	:	horseshoe crabs and extinct forms (noun.animal)

member holonym	:	eurypterida, order eurypterida,
definition	:	extinct aquatic arthropods of the Paleozoic (noun.animal)

member meronym	:	chelicerata, superclass chelicerata,
definition	:	spiders; scorpions; horseshoe crabs (noun.animal)