The genus was first described by Swiss geologist and entomologist Carl Brunner von Wattenwyl in 1888.

[3] Cook et al. (2010) found that Gymnoplectron and Turbottoplectron are synonymised with Pachyrhamma.

Kirby (1906) and Karny (1937) in treating Pachyrhamma as a neuter noun.

Members of the genus are detritivorous scavengers that inhabit dark, damp refugia such as hollow logs, overhangs and caves during the day.

[4] They become more active at night and venture into the surrounding undergrowth to forage.