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The rise of feathered dinosaurs: Kulindadromeus zabaikalicus, the oldest dinosaur with ‘feather-like’ structures

Diverse epidermal appendages including grouped filaments closely resembling primitive feathers in non-avian theropods, are associated with skeletal elements in the primitive ornithischian dinosaur Kulindadromeus zabaikalicus from the Kulinda locality in south-eastern Siberia. This discovery suggests...

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Autores principales: Cincotta, Aude, Pestchevitskaya, Ekaterina B., Sinitsa, Sofia M., Markevich, Valentina S., Debaille, Vinciane, Reshetova, Svetlana A., Mashchuk, Irina M., Frolov, Andrei O., Gerdes, Axel, Yans, Johan, Godefroit, Pascal
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6361000/
https://www.ncbi.nlm.nih.gov/pubmed/30723614
http://dx.doi.org/10.7717/peerj.6239
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author Cincotta, Aude
Pestchevitskaya, Ekaterina B.
Sinitsa, Sofia M.
Markevich, Valentina S.
Debaille, Vinciane
Reshetova, Svetlana A.
Mashchuk, Irina M.
Frolov, Andrei O.
Gerdes, Axel
Yans, Johan
Godefroit, Pascal
author_facet Cincotta, Aude
Pestchevitskaya, Ekaterina B.
Sinitsa, Sofia M.
Markevich, Valentina S.
Debaille, Vinciane
Reshetova, Svetlana A.
Mashchuk, Irina M.
Frolov, Andrei O.
Gerdes, Axel
Yans, Johan
Godefroit, Pascal
author_sort Cincotta, Aude
collection PubMed
description Diverse epidermal appendages including grouped filaments closely resembling primitive feathers in non-avian theropods, are associated with skeletal elements in the primitive ornithischian dinosaur Kulindadromeus zabaikalicus from the Kulinda locality in south-eastern Siberia. This discovery suggests that “feather-like” structures did not evolve exclusively in theropod dinosaurs, but were instead potentially widespread in the whole dinosaur clade. The dating of the Kulinda locality is therefore particularly important for reconstructing the evolution of “feather-like” structures in dinosaurs within a chronostratigraphic framework. Here we present the first dating of the Kulinda locality, combining U-Pb analyses (LA-ICP-MS) on detrital zircons and monazites from sedimentary rocks of volcaniclastic origin and palynological observations. Concordia ages constrain the maximum age of the volcaniclastic deposits at 172.8 ± 1.6 Ma, corresponding to the Aalenian (Middle Jurassic). The palynological assemblage includes taxa that are correlated to Bathonian palynozones from western Siberia, and therefore constrains the minimum age of the deposits. The new U-Pb ages, together with the palynological data, provide evidence of a Bathonian age—between 168.3 ± 1.3 Ma and 166.1 ± 1.2 Ma—for Kulindadromeus. This is older than the previous Late Jurassic to Early Cretaceous ages tentatively based on local stratigraphic correlations. A Bathonian age is highly consistent with the phylogenetic position of Kulindadromeus at the base of the neornithischian clade and suggests that cerapodan dinosaurs originated in Asia during the Middle Jurassic, from a common ancestor that closely looked like Kulindadromeus. Our results consequently show that Kulindadromeus is the oldest known dinosaur with “feather-like” structures discovered so far.
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spelling pubmed-63610002019-02-05 The rise of feathered dinosaurs: Kulindadromeus zabaikalicus, the oldest dinosaur with ‘feather-like’ structures Cincotta, Aude Pestchevitskaya, Ekaterina B. Sinitsa, Sofia M. Markevich, Valentina S. Debaille, Vinciane Reshetova, Svetlana A. Mashchuk, Irina M. Frolov, Andrei O. Gerdes, Axel Yans, Johan Godefroit, Pascal PeerJ Paleontology Diverse epidermal appendages including grouped filaments closely resembling primitive feathers in non-avian theropods, are associated with skeletal elements in the primitive ornithischian dinosaur Kulindadromeus zabaikalicus from the Kulinda locality in south-eastern Siberia. This discovery suggests that “feather-like” structures did not evolve exclusively in theropod dinosaurs, but were instead potentially widespread in the whole dinosaur clade. The dating of the Kulinda locality is therefore particularly important for reconstructing the evolution of “feather-like” structures in dinosaurs within a chronostratigraphic framework. Here we present the first dating of the Kulinda locality, combining U-Pb analyses (LA-ICP-MS) on detrital zircons and monazites from sedimentary rocks of volcaniclastic origin and palynological observations. Concordia ages constrain the maximum age of the volcaniclastic deposits at 172.8 ± 1.6 Ma, corresponding to the Aalenian (Middle Jurassic). The palynological assemblage includes taxa that are correlated to Bathonian palynozones from western Siberia, and therefore constrains the minimum age of the deposits. The new U-Pb ages, together with the palynological data, provide evidence of a Bathonian age—between 168.3 ± 1.3 Ma and 166.1 ± 1.2 Ma—for Kulindadromeus. This is older than the previous Late Jurassic to Early Cretaceous ages tentatively based on local stratigraphic correlations. A Bathonian age is highly consistent with the phylogenetic position of Kulindadromeus at the base of the neornithischian clade and suggests that cerapodan dinosaurs originated in Asia during the Middle Jurassic, from a common ancestor that closely looked like Kulindadromeus. Our results consequently show that Kulindadromeus is the oldest known dinosaur with “feather-like” structures discovered so far. PeerJ Inc. 2019-02-01 /pmc/articles/PMC6361000/ /pubmed/30723614 http://dx.doi.org/10.7717/peerj.6239 Text en ©2019 Cincotta et al. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Paleontology
Cincotta, Aude
Pestchevitskaya, Ekaterina B.
Sinitsa, Sofia M.
Markevich, Valentina S.
Debaille, Vinciane
Reshetova, Svetlana A.
Mashchuk, Irina M.
Frolov, Andrei O.
Gerdes, Axel
Yans, Johan
Godefroit, Pascal
The rise of feathered dinosaurs: Kulindadromeus zabaikalicus, the oldest dinosaur with ‘feather-like’ structures
title The rise of feathered dinosaurs: Kulindadromeus zabaikalicus, the oldest dinosaur with ‘feather-like’ structures
title_full The rise of feathered dinosaurs: Kulindadromeus zabaikalicus, the oldest dinosaur with ‘feather-like’ structures
title_fullStr The rise of feathered dinosaurs: Kulindadromeus zabaikalicus, the oldest dinosaur with ‘feather-like’ structures
title_full_unstemmed The rise of feathered dinosaurs: Kulindadromeus zabaikalicus, the oldest dinosaur with ‘feather-like’ structures
title_short The rise of feathered dinosaurs: Kulindadromeus zabaikalicus, the oldest dinosaur with ‘feather-like’ structures
title_sort rise of feathered dinosaurs: kulindadromeus zabaikalicus, the oldest dinosaur with ‘feather-like’ structures
topic Paleontology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6361000/
https://www.ncbi.nlm.nih.gov/pubmed/30723614
http://dx.doi.org/10.7717/peerj.6239
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