Lucanus maculifemoratus is a species of stag beetle found primarily in parts of Southeast Asia. This beetle is notable for its distinctive appearance, featuring large mandibles that resemble antlers, which are more pronounced in males. The body is typically dark brown to black, with some individuals displaying lighter markings. These beetles inhabit forests and are often found on decaying wood, where they feed on fungi and decaying plant matter. The life cycle of Lucanus maculifemoratus includes a larval stage that develops in wood, contributing to the ecosystem by aiding in decomposition.