Alienopterus brachyelytrus is an extinct insect described from a 99 million year old fossil found in Burmese amber from the Hukawng Valley of Myanmar.

[4] Alienopterus has shortened forewings and functional hindwings capable of flight that are attached to pads as in the Mantophasmatodea.

The foreleg has a femoral brush which is a characteristic of Mantodea.

The mouth points downward from the body axis and has biting mouthparts suggestive of a predator.

The antenna is long and there are large compound eyes as well as three ocelli on the head (which is never found in the Blattodea).