Aegus chelifer, is a species of stag beetle found in Indo-Malaya regional countries.

[1][2] It is a widespread species of stag beetles found extensively throughout Indo-Malayan regions, west of Wallace's line, including: India, Bangladesh, Sri Lanka,[3] Andaman and Nicobar islands, Myanmar, Thailand, Singapore,[4] Laos, Vietnam, Cambodia, Malayan peninsula, Sumatra and Borneo.

The major cause for this is the dispersal event of large number of floating tree trunks from coastal forests of South East Asia which were carried westward by the South Equatorial Current during 2004 Indian Ocean earthquake and tsunami.

[8] A saproxylic species, adults and grubs are generally found in deadwood of broadleaf trees, under bark or fallen tree trunks, in forest patches near human settlements and firewood heaps.

[9][10] Grubs are almost found within decaying wood or other decomposing substrates, where they feed on materials rich in fungal growth.