Ethmostigmus pachysoma is a species of centipede in the Scolopendridae family.

It is endemic to Australia and was first described in 1983 by L. E.

[1] The species has been recorded from the Western Plateau in Western Australia.

[2] The centipedes are solitary terrestrial predators that inhabit plant litter, soil and rotting wood.

[2] This myriapoda-related article is a stub.