Agnathan (Noun)
Meaning
Eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms.
Classification
Nouns denoting animals.
Examples
- The fossil record shows that agnathans were among the earliest vertebrates to evolve on Earth.
- Agnathans are characterized by their eel-like bodies and the absence of jaws or paired fins.
- The cyclostomes, including lampreys and hagfish, are the only living representatives of the agnathans.
- Fossil evidence suggests that agnathans were once a diverse group, with many different species thriving in ancient oceans.
- Despite their primitive appearance, agnathans are still considered vertebrates and are closely related to more advanced fish with jaws.