H. klossi is found in the Indian Ocean in Cambodia, Indonesia (Sumatra), Peninsular Malaysia, Thailand (including Phuket), and Vietnam.

[2] The body of H. klossi is olive dorsally and yellowish ventrally, with black rings, which are wider than the interspaces on the dorsum, but narrower on the venter.

The diameter of the eye is slightly less than its distance from the mouth.

The frontal is very small, as long as broad, less than half as large as the supraocular.

[5] H. klossi is named after Cecil Boden Kloss (1877–1949), director of the Raffles Museum in Singapore from 1923 to 1932.