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] Procellariiformes Fürbringer, 1888 Family Procellariidae Leach, 1820 - petrels, shearwaters Genus Thalassoica Reichenbach, 1853 [monotypic] 1 Thalassoica antarctica (Gmelin, 1789) - Antarctic petrel