Mahatha adonis is a widespread species, known from the Mahaweli Basin, Knuckles Massif and Monaragala.

[2] Mahatha helaya is only known from its type locality, near Kalupahana on the main Colombo-Haputale road, and is therefore considered critically endangered by the IUCN.

[4] Mahatha iora is only known from its type locality, near the Dunhinda Falls, and is therefore considered critically endangered by the IUCN.

[6] The specific epithet lacuna, from the Latin for "hole", refers to the deep burrow in which the species was found.

[8] The specific epithet regina (Latin for "queen") refers to the species' "regal appearance".