On the forehead, which becomes narrower towards the top, there are clear elevations that are differently designed depending on the type.

Large elevations arranged in pairs can often be found on the front edge of the mesonotum, which in males can also be formed as spines.

The abdomen of the males is slender and, unlike in Orestes, the ninth tergite is strongly widened towards the rear.

[2][3][4][5][6] The distribution area of the genus Pylaemenes includes large parts of Southeast Asia.

[2] The nocturnal animals only come out of their hiding places in the leafy layer of the ground or on or behind the bark when it is dark.

As namesake, Stål chose the Paphlagonian king Pylaemenes, a figure from Greek mythology.

Frank H. Hennemann discovered in 1998 that the type species Datames oileus belongs to the genus Pylaemenes.

[9] A Species described by Thanasinchayakul in 2006 as Pylaemenes kasetsartii was not recognized by the ICZN Commission and has been listed as nomen nudum since 2019.

[2] In their genetic analysis study published in 2021 shows Sarah Bank et al. that the Pylaemenes species examined there cannot be assigned to a uniform clade.

Pylaemenes pui described from China in 2013, the sample of which came from Thailand, does not belong in this clade and according to Bresseel, must be assigned to a genus of its own.

This species was first collected by Mark Bushell in summer 2001 on Borneo, more precisely near Sepilok Orangutan Rehabilitation Centre and brought to Europe.