Pharyngeal teeth
Specialized bone elements forming part of the visceral skeleton
Also known as: Throat teeth or crusher teeth
Classification
Specialized bone elements forming part of the visceral skeleton
Dimensions
Very small, typically measuring from a few millimeters to a couple of centimeters across, varying depending on the size of the animal.
Key Features
Look for small, flat-topped, or slightly curved plates that often resemble tiny pebbles, grinding stones, or miniature flower petals. They frequently feature ridged chewing surfaces designed for mashing.
Similar Bones
Beginners might mistake these for small flat seeds, beach pebbles, or tiny shells. A close-up look reveals a porous bone texture and distinct grinding ridges that differentiate them from rocks or seeds.
Across Species
Unlike humans and many mammals that keep their teeth exclusively in their jaws, certain groups of animals like cyprinid fish grow teeth located far back in the throat. These specialized structures are used to grind up hard food items like shelled snails, seeds, and tough vegetation before swallowing.
Evolutionary History
These fascinating feeding tools evolved from modified gill arch supports over hundreds of millions of years, turning breathing structures into efficient crushing and grinding mills deep within the throat.
Photography Tips
Place the items on a solid, neutral-colored background alongside a coin or ruler for scale. Use bright, direct lighting from the side to bring out the tiny ridges and contours on the chewing surfaces.