Orthology inference
We performed the phylogenomic and comparative genomics analyses
including information from 12 species with an available genome assembly:
eight Procellariiformes (P. mauretanicus , Thalassarche
chlororhynchos , Hydrobates tethys , Oceanites oceanicus ,Fregetta grallaria , Pelecanoides urinatrix , Fulmarus
glacialis and Calonectris borealis ), and four outgroups,Aptenodytes forsteri , Pygoscelis adeliae(Sphenisciformes); Egretta garzetta , Phalacrocorax carbo(Pelecaniformes). We inferred orthologous genes across the proteomes of
these 12 species using OrthoFinder 2.3.8 (Emms & Kelly, 2019) with
default parameters.