#NEXUS
BEGIN TAXA;
    Dimensions NTax = 5;
    TaxLabels 'Gavia stellata' 'Gavia arctica' 'Gavia pacifica' 'Gavia immer' 'Gavia adamsii' ;
END;
BEGIN TREES;
    Tree tree1 = ('Gavia stellata',(('Gavia arctica','Gavia pacifica'),('Gavia immer','Gavia adamsii')));
END;