The grinding jaws of a insect are called
Ants
They don't have jaws! They have little pincher things.
The rhinoceros beetle (Dynastes hercules) is well known for having the strongest jaws of any insect. They use their large mandibles to fend off predators and compete for mates.
Mandibles are jaws. Find the mouth and you will find the mandibles.
Platypuses do not have teeth; they have grinding plates in their jaws instead of teeth.
Of course they do. All creatures that chew their food before digestion have jaws and teeth, capable of biting and grinding so it can be swallowed without choking.
A triungulin is a bloodsucking insect larva with three jaws. It is commonly found in beetles, serving as a parasitic nymph.
Usually on it's head. (Ex. Ant, beetle, cockroach)
Adult platypuses do not have teeth. Teeth are not necessary for platypuses, as they "chew" their food by grinding it between horny plates on their upper and lower jaws.
The dog's jaw moves up and down and from side to side, in a grinding motion. The jaws move sideways across the teeth. The cat's jaw moves only up and down, there is no side to side grinding motion. There is no sideways movement.
Many would say that a platypus's mouth is like a beak of a duck. It is rather different, with its bill being broader and flatter than a duck's beak. Inside the platypus's mouth are grinding plates, instead of teeth, with which the platypus grinds its food.