Mecistocephalus lifuensis is a species of soil centipede in the Mecistocephalidae family.

[1] This species was first described in 1898 by zoologist Reginald Innes Pocock based on type material found on is Lifou Island in New Caledonia, a French overseas territory in Melanesia.

[6] The body is yellow, but the head is a medium reddish shade of brown.

The last sternite is broad at the base, shaped like a triangle pointed toward the posterior end.

Thus, this species evolved from this ancestor through a process that added two leg-bearing segments and two leg pairs.