Sandcoleidae
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Sandcoleidae
Sandcoleidae is an extinct family of birds in the order Coliiformes (mousebirds). Fossils of this family have been found in Denmark and the United States. The group may be paraphylectic and is sometimes placed in the separate order Sandcoleiformes. Taxonomy Order COLIIFORMES * Family †Sandcoleidae Houde & Olson 1992 sensu Mayr & Mourer-Chauviré 2004 ** Genus †'' Sandcoleus'' Houde & Olson 1992 ***†''S. copiosus'' ** Genus †'' Anneavis'' Houde & Olson 1992 ***†''A. anneae'' ** Genus †'' Eoglaucidium'' Fischer 1987 ***†''E. pallas'' ** Genus †''Tsidiiyazhi ''Tsidiiyazhi abini'' ( nv, little morning bird) is an extinct relative of the modern mousebirds, found in 2017 in the Nacimiento Formation on ancestral Navajo lands in New Mexico. It is the only species in the genus ''Tsidiiyazhi''. It lived bet ...'' Ksepka ''et al.'', 2017 ***†''T. abini'' Some authorities also include '' Selmes absurdipes'', '' Chascacocolius oscitans'' and '' Eobucco brodkorbi'' in t ...
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Tsidiiyazhi
''Tsidiiyazhi abini'' ( nv, little morning bird) is an extinct relative of the modern mousebirds, found in 2017 in the Nacimiento Formation on ancestral Navajo lands in New Mexico. It is the only species in the genus ''Tsidiiyazhi''. It lived between 62.2 and 62.5 million years ago, making it one of the oldest Cenozoic birds yet described. References

Coliiformes Danian genera Paleocene birds Prehistoric bird genera {{paleo-bird-stub ...
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Paleocene Birds
The Paleocene, ( ) or Palaeocene, is a geological epoch that lasted from about 66 to 56 million years ago (mya). It is the first epoch of the Paleogene Period in the modern Cenozoic Era. The name is a combination of the Ancient Greek ''palaiós'' meaning "old" and the Eocene Epoch (which succeeds the Paleocene), translating to "the old part of the Eocene". The epoch is bracketed by two major events in Earth's history. The K–Pg extinction event, brought on by an asteroid impact and possibly volcanism, marked the beginning of the Paleocene and killed off 75% of living species, most famously the non-avian dinosaurs. The end of the epoch was marked by the Paleocene–Eocene Thermal Maximum (PETM), which was a major climatic event wherein about 2,500–4,500 gigatons of carbon were released into the atmosphere and ocean systems, causing a spike in global temperatures and ocean acidification. In the Paleocene, the continents of the Northern Hemisphere were still connected via s ...
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Eocene Birds
The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', "dawn") and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch. The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isotope 13C in the atmosphere was exceptionally low in comparison with the more common isotope 12C. The end is set at a major extinction event called the ''Grande Coupure'' (the "Great Break" in continuity) or the Eocene–Oligocene extinction event, which may be related to the impact of one or more large bolides in Siberia and in what is now Chesapeake Bay. As with other geologic periods, the strata that define the start and end of the ...
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