Tisamenus serratorius is a stick insect species that occurs on the Philippine island Luzon.

The base of this triangle is attached to the front edge of the mesonotum, is strongly raised and reinforced with spines at the corners.

On this, at the rear edge of the meso- and metanotum, there can be two closely spaced tubercles, which can rarely be formed as short, blunt spines.

On its first to third and partly fourth segment there is a pair of spines directed obliquely to the side, the length of which decreases from front to back.

The thorax becomes even wider from the prothorax to the metathorax, just as the abdomen gradually becomes narrower again towards the end, so that the body looks slightly on both sides convex when viewed from above.

[1] The species name derives from Latin en "serrato "for sawn off and refers to the sawtooth-like reinforced side edges of the thorax.

In 1904, William Forsell Kirby established Tisamenus serratorius as the type species of the genus.