Question

Jaw suspension of mammals is

• A. Amphistylic
• B. Autodiastylic
• C. Hyostylic
• D. Craniostylic

Answer 1

The correct option is D Craniostylic

The entire upper jaw is incorporated into the braincase in mammals and hence the jaw suspension is craniostylic.
Having the mandible suspended by the hyomandibular, or upper part of the hyoid arch, as in fishes is hyostylic suspension. Ex. Bony fishes.
When jaws are attached to the cranium by anterior and posterior ligaments, it is called autodiastylic. Ex: gnathostomes
Amphistylic jaw suspension is a type of jaw suspension seen in certain sharks, in which the upper jaw is braced against the cranium and is also supported by the hyomandibular ligaments.