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39°59′N 74°43′W / 39.983°N 74.717°W / 39.983; -74.717

Laornis
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Family:	†Laornithidae Cracraft, 1973
Genus:	†Laornis Marsh, 1870
Species:	†L. edvardsianus
Binomial name
†Laornis edvardsianus Marsh, 1870
Synonyms
Laopteryx Kurochkin, 1995 (lapsus)

Laornis is a genus of a prehistoric neornithine birds, known only from Specimen YPM 820, a single tibiotarsus leg bone discovered in the late 19th century. Consequently, the genus is monotypic, containing only the species Laornis edvardsianus. Regarding its scientific name, Laornis means "stone bird", from Ancient Greek lao "stone" + ornis "bird". 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.

It was found in Late Cretaceous or Early Paleocene sediments of the Hornerstown Formation at the Birmingham Marl Pits, Pemberton Township, New Jersey, United States (39°59'N, 74°43'W). The deposits were laid down at about 66–63 Ma (million years ago).

The bone is rather distinct but not very diagnostic. Its general shape suggests that Laornis was a semi-aquatic bird with longish legs and a body at least the size of a large goose. 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. On the other hand, it might have been a larger seabird with proportionally shorter legs.

It has variously been allied with the Charadriiformes and the Gruiformes, and is tentatively placed in a family of its own, Laornithidae. It may be considered some kind of basal gruiform, or more probably part of an ancestral lineage related to the common ancestor of gruiform, charadriiform, and/or any or all other modern "wading" bird families. 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.

References

1. ^ Cracraft, Joel (1973). "Systematics and evolution of the Gruiformes (class Aves). 3, Phylogeny of the suborder Grues" (PDF). Bulletin of the American Museum of Natural History. 151: 1–127. (see p. 47 for photographs)
2. Marsh, Othniel Charles (1870). "Notice of some fossil birds from Cretaceous and Tertiary formations of the United States". American Journal of Science. Series 2. 49 (146): 205–217. Bibcode:1870AmJS...49..205M. doi:10.2475/ajs.s2-49.146.205. S2CID 130238178.
3. Wetmore, Alexander (1930). "The age of the supposed Cretaceous birds from New Jersey" (PDF). Auk. 47 (2): 186–188. doi:10.2307/4075921. JSTOR 4075921.
4. Baird, Donald (1967). "Age of fossil birds from the greensands of New Jersey" (PDF). Auk. 84 (2): 260–262. doi:10.2307/4083191. JSTOR 4083191.

External links

• Topographic map of the type locality from TopoQuest

v t e Genera of shorebirds and their extinct allies
Kingdom: Animalia Phylum: Chordata Class: Aves Infraclass: Neognathae Clade: Neoaves Order: Charadriiformes
Charadriiformes incertae sedis †Charadriisimilis †Eupterornis? †Fluviatitavis? †Jiliniornis †"Morsoravis" †Nahmavis †Palintropus? †Sarjeantopodus †Scandiavis †Volgavis? †Laornithidae? Laornis †Graculavidae? Dakotornis Graculavus Palaeotringa Telmatornis? Charadrii See below ↓ Scolopaci See below ↓ Lari See below ↓
Charadrii incertae sedis †Cherevychnavis Burhinidae Burhinus Esacus †Genucrassum Pluvianellidae Pluvianellus Chionidae Chionis †Chionoides †Neilus Pluvianidae Pluvianus Pluvianidae Vanellinae †Dolicopterus? Erythrogonys Hoploxypterus Vanellus †Viator Charadriinae Anarhynchus Charadrius †Dorypaltus Elseyornis †Jilniornis Oreopholus Peltohyas Phegornis Pluvialis Thinornis Recurvirostridae Cladorhynchus Himantopus †Kashinia Recurvirostra Ibidorhynchidae Ibidorhyncha Haematopodidae Haematopus
Scolopaci incertae sedis †Hakawai †Scolopacimilis Jacanidae Actophilornis Hydrophasianus Irediparra Jacana †Janipes Metopidius Microparra †Nupharanassa Pedionomidae †Oligonomus Pedionomus Rostratulidae Nycticryphes Rostratula Scolopacidae Actitis Arenaria Bartramia Calidris Coenocorypha †Elorius Gallinago Limnocryptes Limnodromus Limosa †Mirolia Numenius †Nuntius †Paractitis †Parvelorius Phalaropus Prosobonia Scolopax Tringa †Villetus Xenus Thinocoridae Attagis Thinocorus
Lari Alcidae †Divisulcus †Hydrotherikornis †Miocepphus †Pseudocepphus Alcinae Alcini Alca Alle †Pinguinus Uria Synthliboramphini Synthliboramphus Cepphini Cepphus Brachyramphini Brachyramphus Fraterculinae Aethiini Aethia Ptychoramphus Fraterculini Cerorhinca Fratercula †Mancallinae Alcodes Mancalla Miomancalla Praemancalla Dromadidae Dromas Glareolidae †Becassius †Boutersemia †Mioglareola †Paractiornis †"Precursor"? Glareolinae Glareola Stiltia Glareolinae Cursorius Rhinoptilus Laridae Anous Chlidonias Chroicocephalus Creagrus †Feducciavis †Gaviota Gelochelidon Gygis Hydrocoloeus Hydroprogne Ichthyaetus †Laricola Larosterna Larus Leucophaeus †Limicolavis? †Limosavis Onychoprion Pagophila Phaetusa †Pseudosterna Rhodostethia Rynchops Rissa Sterna †Sternalara Sternula Thalasseus Xema Stercorariidae Stercorarius Turnicidae †Cerestenia †Eocliffia? Ortyxelos †Turnipax Turnix

• Basal Neoaves
• Prehistoric bird genera
• Late Cretaceous birds of North America
• Paleogene birds of North America
• Fossil taxa described in 1870