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Enw gwyddonolStatws
Creagrusgenus
Creagrus furcatusfull species
Rissagenus
Rissa tridactylafull species
Rissa tridactyla tridactylanominal subspecies
Rissa tridactyla pollicarissubspecies (candidate for split)
Rissa brevirostrisfull species
Rissa estesifossil species (extinct)
Rissa [brevirostris or tridactyla]species group
Pagophilagenus
Pagophila eburneafull species
Xemagenus
Xema sabinifull species
Xema sabini (sabini)nominal suspecies (sensu stricto)
Xema sabini (palaearctica)junior synonym (or subspecies)
Xema sabini (tschuktschorum)junior synonym (or subspecies)
Xema sabini (woznesenskii)junior synonym (or subspecies)
Chroicocephalusgenus
Gelastesgenus (synonym)
Bruchigaviagenus (synonym)
Chroicocephalus brunnicephalusfull species
Chroicocephalus cirrocephalusfull species
Chroicocephalus cirrocephalus cirrocephalusnominal subspecies
Chroicocephalus cirrocephalus poiocephalussubspecies
Chroicocephalus hartlaubiifull species (or subspecies)

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