It inhabits the Western and central Indo-Pacific ocean, including Singapore, Malaysia, Australia (Queensland), the Philippines and New Guinea.

Tioman crabs are supralittoral (live above the high tide line).

[1] In Cairns, Australia they are known for moving in numbers in some seasons entering backyards and homes.

It was placed in a new genus Tiomanium (originally Tiomanum) by Serene and Soh[3] The carapace is convex and 34 mm length.

Key features that differentiate Tiomanium from Neosarmatium include a spine at the end of the upper inner margin of the cheliped palm and a spine on the upper inner angle of the carpus.