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Un nuevo terópodo aviar de una fauna terrestre emergente del Jurásico

Liming Xu¹, Min Wang², Runsheng Chen¹

¹Fujian Institute of Geological Survey, Fuzhou, China.

|September 6, 2023

Resumen

Un nuevo fósil de ave del Jurásico, Fujianvenator prodigiosus, descubierto en China revela rasgos únicos. Este hallazgo arroja luz sobre la evolución de las aves primitivas y sus diversos estilos de vida durante el período Jurásico Tardío.

Área de la Ciencia:

Paleontología
Biología evolutiva
Paleontología de los vertebrados

Sus antecedentes:

El origen de las aves de los dinosaurios terópodos no aviares es un área clave del estudio evolutivo.
El registro fósil de los primeros avialanes es escaso, lo que limita la comprensión de la evolución de las primeras aves.
Las controversias filogenéticas rodean el origen preciso y la diversificación de las aves primitivas.

Objetivo del estudio:

Describir un nuevo fósil aviar temprano geográficamente y estratigráficamente significativo.
Para investigar el mosaicismo evolutivo en la filogenia aviar profunda.
Para reconstruir el paleoambiente y el ecosistema de la fauna del Jurásico Tardío Zhenghe.

Principales métodos:

Descripción de las características morfológicas de Fujianvenator prodigiosus.
Análisis comparativo con avianos y terópodos no avianos del Mesozoico.
Datamiento radioisotópico in situ y estudios estratigráficos para establecer el marco cronológico.

Principales resultados:

Descubrimiento de Fujianvenator prodigiosus, una ave del Jurásico tardío de China.
F. prodigiosus exhibe una combinación única de características, incluida una extremidad posterior alargada.
La Fauna de Zhenghe, datada de hace 148-150 millones de años, incluye diversos vertebrados acuáticos y semiacuáticos.

Conclusiones:

F. prodigiosus sugiere un mosaicismo evolutivo en la evolución de las primeras aves.
Las adaptaciones terrestres o de vadeo de F. prodigiosus contrastan con las adaptaciones arbóreas / aéreas de otros avianos primitivos.
La Fauna de Zhenghe proporciona información crucial sobre los ecosistemas terrestres del Jurásico Tardío y la diversidad de vertebrados.

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