The bones of the mandible and quadrate bones can also pick up ground borne vibrations.
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The jaw articulates via a hinge joint between the quadrate and articular.
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The jaw joint consisted of the articular bone in the lower jaw and the quadrate in the upper jaw.
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The malleus has evolved from the articular bone of the lower jaw, and the incus from the quadrate.
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And in mammals the quadrate and articular bones have become the incus and malleus bones in the middle ear.
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In mammals the quadrate and articular bones have become the incus and malleus bones in the middle ear.
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In the mammal configuration, the quadrate and articular bones are much smaller and form part of the middle ear.
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As the dentary continued to enlarge during the Triassic, the older quadrate-articular joint fell out of use.
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In the Jurassic, their quadrate and articular bones evolved into the incus and malleus bones in the middle ear.
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More examples
A cubelike object
Having four sides and four angles
A square-shaped object
The quadrate bone is part of a skull in most tetrapods, including amphibians, sauropsids (reptiles, birds), and early synapsids. ...
In heraldry, an ordinary is described as quadrate (or more fully nowy quadrate]]) when it has a square central boss.
A quadrat block (or quadrate block) is a virtual rectangle or square in Egyptian hieroglyphic text.
Also known as "quadrant." A configuration of four souls who work together over many lifetimes. The positions of a quadrate are love, knowledge, power, and support (or compassion). The first and third positions are strongest.
This kind is found in humans and various other species. Four cusps are arranged in a rectangle; there may be a fifth.
A paired bone which, in most teleosts, has a triangular shape. The anteroventral angle of the quadrate articulates with the angular, acting as a pivot for the lower jaw (more information).