Ichthyornis

American  

[ik-thee-awr-nis] / ˌɪk θiˈɔr nɪs /

noun

1. an extinct genus of toothed birds having vertebrae resembling those of fishes.

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ichthyornis British  

/ ˌɪkθɪˈɔːnɪs /

noun

1. an extinct Cretaceous sea bird of the genus Ichthyornis, thought to have resembled a tern

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Etymology

Origin of Ichthyornis

< New Latin (1872) < Greek ichthy- ichthy- ( def. ) + órnis “bird”

Example Sentences

Several skulls of its older Ichthyornis relative have been described in recent years with bones that suggested the bird’s upper palate might have been jointed, but the evidence was still fuzzy.

From Science Magazine • Nov. 30, 2022

They suspect the jointed beak was present in even older birds, because the rest of the specimen indicates it was a relative of Ichthyornis, another ancient bird that lived about 20 million years earlier.

From Science Magazine • Nov. 30, 2022

Ichthyornis also retains primitive openings in the roof of the skull that, in dinosaurs such as Tyrannosaurus, allow large muscles to attach to the jaw.

From National Geographic • May 2, 2018

But chambers on each side of the skull suggest Ichthyornis had large jaw muscles more similar to those of its dinosaurian ancestors.

From Scientific American • May 2, 2018

A more reptilian character in the Ichthyornis group is the fact that, unlike any modern bird, but like their reptile ancestors, they had biconcave vertebrae.

From The Story of Evolution by McCabe, Joseph