Evolution and systematics

Exact affinities of these small, wormlike, burrowing scle-roglossans remain unknown. They could be related to other fossorial scincomorphans, amphisbaenians, or even to snakes. Many of the traits they share with other squamate groups could have evolved convergently, however, in response to their subterranean habits. Although the geographic distributions of the two genera of dibamids are widely separated, their relationship to each other is supported strongly by numerous shared derived characteristics, some of which also are shared with members of various other lizard families. Dibamids have diverged greatly from other squamates and could represent remnants of an extremely ancient lineage. No subfamilies are recognized.

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