Neornithes Gadow, 1893 - living birds Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900 Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988 Order [Columbiformes] Latham, 1790 - pigeons and allies Family Pteroclididae - sandgrouse see Family Pteroclidae Bonaparte, 1831 Genus Pterocles Temminck, 1815 Pterocles exustus Temminck, 1825 - chestnut-bellied sandgrouse Pterocles exustus ellioti Bogdanov, 1881