The antennae usually have 19 articles, but some specimens have 18 on one side. The ultimate legs are long and slender. The sternite of the last leg-bearing segment has sides that converge posteriorly and a surface without a depression. One individual collected in Thailand in 2001 was first observed under a rock slab beside a stream about 1.5 m wide and 20 cm deep. It escaped into the stream and hid under a rock. After capture, in a glass container of water, it swam powerfully along the bottom with vigorous horizontal undulations. It is known from Laos, Thailand and Vietnam. The type locality is Tad E-tu Waterfall in Champasak, Laos. In Thailand, there is a collecting record from Khao Sok National Park, Surat Thani.
The antennae usually have 19 articles, but some specimens have 18 on one side.
One individual collected in Thailand in 2001 was first observed under a rock slab beside a stream about 1.5 m wide and 20 cm deep. It escaped into the stream and hid under a rock. After capture, in a glass container of water, it swam powerfully along the bottom with vigorous horizontal undulations.
The ultimate legs are long and slender.
The sternite of the last leg-bearing segment has sides that converge posteriorly and a surface without a depression.
An extinction-risk assessment has not been added yet.