Fossilized melanosomes and the colour of Cretaceous dinosaurs and birds

Nature, Год журнала: 2010, Номер 463(7284), С. 1075 - 1078

Опубликована: Янв. 27, 2010

Язык: Английский

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Cope's rule and the adaptive landscape of dinosaur body size evolution

Palaeontology, Год журнала: 2017, Номер 61(1), С. 13 - 48

Опубликована: Окт. 22, 2017

Abstract The largest known dinosaurs weighed at least 20 million times as much the smallest, indicating exceptional phenotypic divergence. Previous studies have focused on extreme giant sizes, tests of Cope's rule, and miniaturization line leading to birds. We use non‐uniform macroevolutionary models based Ornstein–Uhlenbeck trend processes unify these observations, asking: what patterns evolutionary rates, directionality constraint explain diversification dinosaur body mass? find that evolution is constrained by attraction discrete size optima undergo rare, but abrupt, shifts. This model explains both rarity multi‐lineage directional trends, occurrence abrupt excursions during origins groups such tiny pygostylian birds sauropods. Most expansion trait space results from constraint‐breaking innovations in just a small number lineages. These lineages shifted rapidly into novel regions space, occasionally most often large or sizes. As with Cenozoic mammals, intermediate sizes were typically attained only transiently trajectory size. demonstrates bimodality adaptive landscape for land vertebrates has existed more than 200 years.

Язык: Английский

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Origin and Evolution of Birds

Fascinating life sciences, Год журнала: 2023, Номер unknown, С. 1 - 154

Опубликована: Янв. 1, 2023

Язык: Английский

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A bizarre Jurassic maniraptoran from China with elongate ribbon-like feathers

Nature, Год журнала: 2008, Номер 455(7216), С. 1105 - 1108

Опубликована: Окт. 1, 2008

Язык: Английский

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An Early Cretaceous heterodontosaurid dinosaur with filamentous integumentary structures

Nature, Год журнала: 2009, Номер 458(7236), С. 333 - 336

Опубликована: Март 1, 2009

Язык: Английский

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High-precision 40Ar/39Ar age for the Jehol Biota

Palaeogeography Palaeoclimatology Palaeoecology, Год журнала: 2009, Номер 280(1-2), С. 94 - 104

Опубликована: Июнь 22, 2009

Язык: Английский

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Pre‐modern Birds: Avian Divergences in the Mesozoic

Опубликована: Апрель 8, 2011

This chapter contains sections titled: The Theropod Hypothesis of the Origin Birds Mesozoic Aviary Phylogenetic Hypotheses Early Evolution Conclusions Acknowledgments Appendix 3A 3B References

Язык: Английский

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The Jehol Biota, an Early Cretaceous terrestrial Lagerstätte: new discoveries and implications

National Science Review, Год журнала: 2014, Номер 1(4), С. 543 - 559

Опубликована: Сен. 6, 2014

Abstract The study of the Early Cretaceous terrestrial Jehol Biota, which provides a rare window for reconstruction Lower ecosystem, is reviewed with focus on some latest progress. A newly proposed definition biota based paleoecology and taphonomy accepted. Although fossils are mainly preserved in two types sedimentary rocks, there various preservation complex mechanism that remains to be understood. New discoveries significant taxa from an updated introduction its diversity, confirm Biota represents one most diversified biotas Mesozoic. evolutionary significance major biological groups (e.g. dinosaurs, birds, mammals, pterosaurs, insects, plants) discussed light recent discoveries, remarkable aspects highlighted. global local geological, paleogeographic, paleoenvironmental background have contributed unique composition, evolution, biota, demonstrating widespread faunal exchanges between Asia other continents caused by presence Eurasia–North American continental mass link South America, confirming northeastern China as origin diversification center variety groups. progress has been made paleotemperature at time much more work needed possible diversity cold intervals during Cretaceous. Finally, future directions highlight great potential comprehensive multidisciplinary studies further our understanding geological implications Lagerstätte.

Язык: Английский

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Vertebrate diversity of the Jehol Biota as compared with other lagerstätten

Science China Earth Sciences, Год журнала: 2010, Номер 53(12), С. 1894 - 1907

Опубликована: Ноя. 30, 2010

Язык: Английский

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The oldest record of ornithuromorpha from the early cretaceous of China

Nature Communications, Год журнала: 2015, Номер 6(1)

Опубликована: Май 5, 2015

Ornithuromorpha is the most inclusive clade containing extant birds but not Mesozoic Enantiornithes. The early evolutionary history of this avian has been advanced with recent discoveries from Cretaceous deposits, indicating that and Enantiornithes are two major groups in Mesozoic. Here we report on a new ornithuromorph bird, Archaeornithura meemannae gen. et sp. nov., second oldest avian-bearing deposits (130.7 Ma) world. taxon referable to Hongshanornithidae constitutes record Ornithuromorpha. However, A. shows few primitive features relative younger hongshanornithids deeply nested within Hongshanornithidae, suggesting already well established. discovery extends by five six million years, which turn pushes back divergence times lingeages into Early Cretaceous.

Язык: Английский

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