Nyctibiidae Potoos and Caprimulgidae Nightjars

The nocturnal Nyctibiidae and Caprimulgidae share derived skull features, including a cone-like bony protrusion in the orbit, at the caudal margin of the foramen for the optic nerve, and extremely widened palatine bones (Fig. 12.2; Mayr 2002b). A clade including these two taxa is also supported by an analysis of mitochondrial genes (Brown et al. 2008), but is not retained in phylogenies based on nuclear sequence data, which do not conclusively resolve their affinities (Cracraft et al. 2004; Ericson et al. 2006).

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