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]

Tytthostonyx Temporal range: Late Cretaceous, 66 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Procellariiformes
Family:	†Tytthostonychidae Olson & Parris, 1987[1]
Genus:	†Tytthostonyx Olson & Parris, 1987[1]
Species:	†T. glauconiticus
Binomial name
†Tytthostonyx glauconiticus Olson & Parris, 1987[1]

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