Sinonim anaspida

English Thesaurus

1. extinct order of jawless vertebrates (noun.animal)

hypernym	:	animal order,
definition	:	the order of animals (noun.animal)

member holonym	:	anaspid,
definition	:	extinct small freshwater jawless fish usually having a heterocercal tail and an armored head; of the Silurian and Devonian (noun.animal)

member meronym	:	agnatha, superclass agnatha,
definition	:	superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys; hagfishes; some extinct forms (noun.animal)