The Coliiformes are represented by a single family, Coliidae or mousebirds, with six species in two genera (Colius and Urocolius) confined to sub-Saharan Africa.
Ksepka, D.T. and Clarke, J.A. (2010), New fossil mousebird (Aves: Coliiformes) with feather preservation provides insight into the ecological diversity of an
Eocene North American avifauna. Zool J. Linn. Soc. 160(4), 685-706. (abstract)
Zelenkov, N.V. and Dyke, G.J. (2008), The fossil record and evolution of mousebirds (Aves: Coliiformes). Palaeontology 51(6), 1403-1418. (pdf)