TL;DR: The skull and the jaw adductor musculature are analysed in a number of representatives of the Ethiopian scincomorph lizard genera Acontias, Typhlosaurus and Feylinia and an amended diagnosis is given, the Feyliniidae are a scIncomorph family, possibly with gekkotan affinities.
Abstract: The skull and the jaw adductor musculature are analysed in a number of representatives of the Ethiopian scincomorph lizard genera Acontias, Typhlosaurus and Feylinia. Acontias and Typhlosaurus are closely related and are to be included in a single taxon, the Acontinae, provisionally classified as a subfamily of the Scincidae. The family Feyliniidae (including the genera Feylinia and Chabanaudia) is revalidated and an amended diagnosis is given, The Feyliniidae are a scincomorph family, possibly with gekkotan affinities.
TL;DR: Reconstructions of ancestral states for limb and digital characters show limited support for the reversal or gain of both digits and limbs, but conservative interpretation of the results suggest that limb loss is common, occurring multiple times throughout evolutionary history, and is most likely not reversible.