Definition of Acanthodians. Meaning of Acanthodians. Synonyms of Acanthodians

- However, acanthodians are not true sharks; their close relation to modern cartilaginous fish can lead them to be considered "stem-sharks". Acanthodians had...
- that are no longer considered acanthodians. Not counting their descendants, the modern chondricthyans, all acanthodians are extinct. Extinct genera are...
- that Osteichthyes evolved from placoderms like Entelognathus, while acanthodians are more closely related to modern chondrichthyes. Teleostomi, therefore...
- acanthodians represent a paraphyletic ****emblage leading to Chondrichthyes. Some characteristics previously thought to be exclusive to acanthodians are...
- Ordovician-aged microfossils of what have been identified as scales of either acanthodians or "shark-like fishes", may mark Gnathostomata's first appearance in...
- the Chondrichthyes (cartilaginous fish) and the extinct placoderms and acanthodians, which have endoskeletons primarily composed of cartilage. The vast majority...
- Silurian was the diversification of jawed fish, which include placoderms, acanthodians (which gave rise to cartilaginous fish) and osteichthyan (bony fish,...
- spine') is an extinct genus of acanthodian fish from Devonian Scotland. It is among the more primitive of the Devonian acanthodians. Mesacanthus body fossils...
- Parexus is an extinct genus of acanthodian fish. Acanthodians are often referred to as ‘spiny sharks’, although acanthodians are not true sharks and evolved...
- of ossified endoskeleton instead of cartilages like the skeletons of acanthodians, chondrichthyians and most placoderms. There are otherwise vast differences...