The shape of the head, viewed from the front, is sub-triangular owe to the very long mandibles.

Males show two long mandibles with small teeth at the inner side.

The mandibles of O. bauri are an exaggerated form of the sturdy and long mandibles found in many ant species.

Tuluk extended his long mandible, waved it agitatedly.

This especially happens with stag beetles: males will fight using their long mandibles.

They have long mandibles and have the ability to leap a few inches.

They have relatively simple mouthparts, with long mandibles and fleshy palps, which resemble those of the more primitive true flies.

Soldier termites are also wingless and resemble workers except that they have a large, rectangular, yellowish-brown head with long black mandibles.

Adults characteristically possess the long, powerful serrated mandibles and a venom-laced sting capable of causing severe pain for a couple of days.

The two species are distinguished by the mandible features, with S. cornutus having longer mandibles that have only two teeth.