[1] It is distributed primarily in the west-central Amazon basin of Brazil, ranging down into Colombia, Paraguay, and Uraguay.

A lack of dorsal vestiture, or hairlike scales on its back, sets it apart from similar & related beetles such as M. actaeon.

[4] As with all Megasoma species, M. mars has strong legs with large claws in order to aid in holding onto tree branches.

[3] While there are no recorded observations of M. mars feeding in the wild, in captivity larvae will eat decayed wood and leaves in the families of oak, beech, and chestnut, and adults will eat fruit.

Eggs will incubate for 1 month, and once they hatch they will spend a majority of their life in larval form, eating and growing.