Obrimus mesoplatus is a stick insect species from the family of the Heteropterygidae native to the Philippine island of Luzon.

In this case too, the slits in the metasternum (metasternal pseudoforamina) typical of the genus Obrimus are very narrow and barely recognizable.

Triangular elevations (lobes) are located in the middle of the sixth to ninth abdominal tergum.

[3] Since the genus is so far only known from Luzon, more recent works assume that Obrimus mesoplatus is also endemic there.

[3] In 1859, like many others, he transferred the species to the former subgenus Acanthoderus, which is now listed as a genus, and here again describes the male,[5] which is kept as the holotype at the Natural History Museum in London.