Laopteryx Kurochkin, 1995 (lapsus) Laornis is a genus of a prehistoric neornithine birds, known only from Specimen YPM 820, a single tibiotarsus leg bone[1] discovered in the late 19th century.
edvardsianus honors Alphonse Milne-Edwards, to compliment the French paleontologist on his landmark study Recherches Anatomiques et Paleontologiques pour servir a l'Histoire des Oiseaux Fossiles de la France, the second part of which was nearing completion at that time.
[1][2] It was found in Late Cretaceous or Early Paleocene[3][4] sediments of the Hornerstown Formation at the Birmingham Marl Pits, Pemberton Township, New Jersey, United States (39°59'N, 74°43'W).
It may have been a wading bird, in which case it stood probably around one meter (3–4 ft) tall in life, depending on how long its legs and neck were exactly, which of course cannot be told from the one known bone.
It might have been one of the extinct stilt-legged waterfowl of the Presbyornithidae, and it cannot even be excluded that it was an ancient pseudotooth bird, seabirds of unclear affiliation that evolved to immense proportions in the Neogene but by the time of Laornis probably were mostly the size of a large petrel.