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Type: Artigo
Title: Praeornis sharovi Rautian, 1978 a fossil feather from the early Late Jurassic of Kazakhstan
Author(s)/Inventor(s): Agnolín, Federico L.
Rozadilla, Sebastián
Carvalho, Ismar de Souza
Abstract: Since its original description as a feather belonging to a basal bird, the phylogenetic position of Praeornis sharovi was debated. It was considered as belonging to a bird, a cycad leaf, or as a ‘transitional’ integumentary structure between reptile scales and bird feathers. Recently, a basal enantiornithine bird was collected in Early Cretaceous beds of Brazil. This specimen shows very well-preserved rachis-dominated tail feathers with a very thick rachis and thick and rigid barbules. These features are present in Praeornis, suggesting that this fossil may be interpreted as the tail feather of a basal bird. In this way, Praeornis constitutes one of the oldest records of rachis-dominated feathers in the world. Rachis-dominated tail feathers, including that of Praeornis appear to be rigid paired structures not performed for aerodynamical purposes, suggesting that may be important in body balance.
Keywords: Praeornis
Fossil feather
Fóssil de pena
Production unit: Instituto de Geociências
Publisher: Taylor & Francis
In: Historical Biology
Issue: 1
Issue Date: 11-Dec-2017
DOI: 10.1080/08912963.2017.1413102
Publisher country: Estados unidos
Language: eng
Right access: Acesso Aberto
ISSN: 0891-2963
Citation: Agnolín, F.L.; Rodazilla, S. & Carvalho, I.S. 2017. Praeornis sharovi Rautian, 1978 a fossil feather from the early Late Jurassic of Kazakhstan. Historical Biology, 2017.
Appears in Collections:Ciências Exatas e da Terra

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