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] Charadriiformes Huxley, 1867 - shorebirds, gulls, auks Family Alcidae Vigors, 1825 - auks Genus Ptychoramphus Brandt, 1837 [monotypic] 1 Ptychoramphus aleuticus (Pallas, 1811) - Cassin's auklet