agnathan

• Substantivo que designa um vertebrado aquático sem mandíbulas e sem apêndices pares, incluindo as lampreias, as feiticeiras e diversas formas fósseis.

A noun referring to an eel-shaped vertebrate that lacks jaws and paired appendages, including cyclostomes and certain extinct forms.

1. Jawless fishC2formalscientific

   An eel-shaped vertebrate without jaws or paired appendages, including the cyclostomes and some extinct forms.

   Peixe sem mandíbula

   • Agnathans are considered the most primitive living vertebrates.
   • Lampreys and hagfish are the only surviving agnathans.
   • Fossil records show that agnathans were abundant in the Ordovician period.

   Sinônimoscyclostomejawless fishostracoderm

   Antônimosgnathostome