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/ˈæɡ.nə.θən/ · adjective
(zoology) Belonging or pertaining to the superclass Agnatha, the jawless vertebrates..
Haikouichthys is one of three species of jawless (or agnathan) fish to be found in the Early Cambrian period.
Thus should the cranial neural crest in cyclostomes prove to be non-skeletogenous this might be a reflection either of its own primitiveness or of the different evolutionary origins and morphological status of the visceral skeleton in agnathans and gnathostomes.
The hagfish is an agnathan, a modern representative of the earliest evolved group of vertebrates, the ostracoderms or jawless fishes, which arose prior to the ancient placoderms (3).
Use agnathan when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Agnathan means (zoology) Belonging or pertaining to the superclass Agnatha, the jawless vertebrates..
Common synonyms include agnath, agnatha, jawless fish, jawless vertebrate.
The opposite depends on the specific sense.
Haikouichthys is one of three species of jawless (or agnathan) fish to be found in the Early Cambrian period.
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