Every reference with a DOI in the deposited reference list resolved to a known
work in Crossref or DataCite at the dated check, and none carried a publisher retraction,
withdrawal, or removal notice.
The 18 references without a DOI — listed, not checked
no DOI — not checkedR. Barsbold, 1983 .Carnivorous dinosaurs from the Cretaceous of Mongolia., Trudy Sovmestnoi Sovetsko-Mongol'skoi Paleontologicheskoi Ekspeditsii, 19 :1 –120 .[in Russian].
no DOI — not checkedR. D. Benson, 1999 .Presbyornis isoni and other late Paleocene birds from North Dakota., Smithsonian Contributions to Paleobiology, 89 :253 –259 .
no DOI — not checkedP. G. P. Ericson, 1999 .New material of Juncitarsus (Phoenicopteriformes), with a guide for differentiating that genus from the Presbyornithidae (Anseriformes)., Smithsonian Contributions to Paleobiology, 89 :245 –251 .
no DOI — not checkedP. G. P. Ericson, 2000 .Systematic revision, skeletal anatomy, and paleoecology of the New World early Tertiary Presbyornithidae (Aves: Anseriformes)., Paleobios, 20 :1 –23 .
no DOI — not checkedC. J. O. Harrison, and C. A. Walker .1978 .Proherodius oweni as a species of Presbyornithidae., Tertiary Research, 2 :1 –3 .
no DOI — not checkedC. J. O. Harrison, and C. A. Walker .1979 .Birds of the British Lower Oligocene., Tertiary Research Special Paper, 5 :29 –39 .
no DOI — not checkedS. Hope, and T. A. Stidham .2001 .Late Cretaceous-Early Tertiary avifaunas in North America., Journal of Vertebrate Paleontology, 21 :63 .A.
no DOI — not checkedH. Howard, 1929 .The avifauna of Emeryville Shellmound., University of California Publications in Zoology, 32 :301 –394 .
no DOI — not checkedH. Howard, 1955 .A new wading bird from the Eocene of Patagonia., American Museum Novitates, 1710 :1 –25 .
no DOI — not checkedE. N. Kurochkin, 1995 .Synopsis of Mesozoic birds and early evolution of class Aves., Archaeopteryx, 13 :47 –66 .
no DOI — not checkedE. N. Kurochkin, 1999 .A new large enantiornithid from the Late Cretaceous of Mongolia.InI. Darevskii and A. Averianov (editors), Materials on the history of fauna of Eurasia.Zoological Institute of the Russian Academy of Sciences, Saint-Petersburg, 277 :132 –147 .[in Russian].
no DOI — not checkedV. L. Leggitt, and H. P. Buchheim .1997 .Presbyornis (Aves: Anseriformes) eggshell from three avian mass mortality sites: Eocene Fossil Lake, Lincoln County, Wyoming., Journal of Vertebrate Paleontology, 17 :60 .A.
no DOI — not checkedP. O. McGrew, and A. Feduccia .1974 .A preliminary report on a nesting colony of Eocene birds., Wyoming Geological Association Guidebook, 1973 :163 –164 .
no DOI — not checkedL. A. Nessov, 1988 .New Cretaceous and Paleogene birds of Soviet Middle Asia and Kazachstan and environments., Proceedings of the Zoological Institute of USSR Academy of Sciences, 182 :116 –123 .[in Russian].
no DOI — not checkedJ. I. Noriega, and C. P. Tambussi .1995 .A Late Cretaceous Presbyornithidae (Aves: Anseriformes) from Vega Island, Antarctic peninsula: paleobiogeographic implications., Ameghiniana, 32 :57 –61 .
no DOI — not checkedS. L. Olson, 1994 .A giant Presbyornis (Aves: Anseriformes) from the Paleocene Aquia Formation of Maryland., Proceedings of the Biological Society of Washington, 107 :429 –435 .
no DOI — not checkedS. L. Olson, 1999 .The anseriform relationships of Anatalavis Olson and Parris (Anseranatidae), with a new species from the Lower Eocene London Clay., Smithsonian Contributions to Paleobiology, 89 :231 –243 .
no DOI — not checkedA. V. Rodionov, 1997 .Evolution of avian chromosomes and linkage groups., Genetics, 33 :725 –738 .
checked 2026-07-14 — re-checked daily as this page is visited;
titles and statuses come from Crossref and DataCite and are not part of the signed record
Both snippets point at the live badge image and link back to this page. The
badge re-renders from the daily check, so an embed never goes stale by more than a day of visits.