Tytthostonyx

Tytthostonyx is a genus of prehistoric seabird. Found in the much-debated Hornerstown Formation which straddles the Cretaceous–Paleogene boundary 66 million years ago, this animal was apparently closely related to the ancestor of some modern birds, such as Procellariiformes and/or "Pelecaniformes". A single species is placed herein, Tytthostonyx glauconiticus.^[1]

It has been placed into a family of its own, Tytthostonychidae.^[1]

References

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Genera of penguins, petrels, and albatrosses and their extinct allies

• Kingdom: Animalia
• Phylum: Chordata
• Class: Aves
• Infraclass: Neognathae
• Clade: Austrodyptornithes

Sphenisciformes
incertae sedis †Arthrodytes †Aprosdokitos †Kaiika †Kumimanu †Kupoupou †Muriwaimanu †Nucleornis †Orthopteryx †Petradyptes †Sequiwaimanu †Tonniornis †Waimanu †Wimanornis Spheniscidae †Crossvallia †Dege †Duntroonornis †Korora †Icadyptes †Inguza †Inkayacu †Kairuku †Marambiornopsis †Marplesornis †Palaeoapterodytes †Perudyptes †Pseudaptenodytes †Tasidyptes †Tereingaornis †Palaeospheniscinae Eretiscus Palaeospheniscus †Paraptenodytinae Arthrodytes Paraptenodytes †"Palaeeudyptinae" Anthropodyptes Anthropornis Archaeospheniscus Delphinornis Marambiornis Mesetaornis Pachydyptes Palaeeudyptes Platydyptes Spheniscinae Aptenodytes Eudyptes Eudyptula †Madrynornis Megadyptes Pygoscelis Spheniscus

Procellariiformes
incertae sedis †Kievornis †Lonchodytes? †Makahala †Diomedeoididae Diomedeoides Rupelornis †Marinavidae Marinavis †Tytthostonychidae Tytthostonyx Diomedeidae †Aldiomedes †Diomedavus Diomedea †Murunkus †Notoleptos Phoebastria Phoebetria †Plotornis Thalassarche †Tydea Oceanitidae Fregetta Garrodia Nesofregetta Oceanites Pelagodroma Hydrobatidae Hydrobates Procellariidae Aphrodroma Ardenna †Argyrodyptes Bulweria Calonectris Daption †Eopuffinus Fulmarus Halobaena Macronectes Pachyptila Pagodroma Pelecanoides †Primodroma Procellaria Pseudobulweria Pterodroma †Pterodromoides Puffinus Thalassoica

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