Britannica
Sources used in this answer
How did the jaw suspension of palaeonisciform fishes affect the size of their mouth opening?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
holostean
Living and fossil forms of Holostei.
In palaeonisciform fishes, the orientation of the jaw suspension directly influenced the size of the mouth opening. An oblique orientation of the jaw suspension was associated with a wide mouth gape, whereas a nearly vertical orientation was associated with a relatively smaller gape.1