Tisamenus deplanatus is a stick insect species native to the Philippine islands Luzon and Mindanao occurs.

On the relatively short mesothorax, which widens in a strongly trapezoidal shape towards the rear, there is the triangle formed by raised edges, which is typical of Tisamenus species.

In similar species, the triangle on the mesothorax is significantly longer, in Tisamenus fratercula about half as long as the mesonotum.

That of the females is almost as wide at the base as the metathorax at its widest point and tapers evenly to the tip of the secondary ovipositor.

[1][2] In 1845 John Obadiah Westwood first described the species as Phasma (Pachymorpha) deplanatum and transferred it to the genus Acanthoderus in 1859.

Sarah Bank et al included representatives of both stocks or species in their genetic analysis published in 2021.

[4] A stock found in the terrariums of enthusiasts goes back to animals that Thierry Heitzmann collected in the Ilocos region in 2014.