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La línea media carnosa y los cascos del dinosaurio de pico de pato revelan una "mumificación" de arcilla terrestre
Paul C Sereno1,2, Evan T Saitta1, Daniel Vidal1,3
1Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL, USA.
Resumen
Dos momias de Edmontosaurus revelan piel fosilizada, espinas y pezuñas conservadas como plantillas de arcilla delgada. Esta preservación única se produjo durante la descomposición de la cana antes de la pérdida de tejido blando.
Área de la Ciencia:
- Paleontología
- Geología
Sus antecedentes:
- La conservación excepcional de los tejidos blandos de los dinosaurios es rara.
- El integumento fosilizado, que incluye piel, espinas y pezuñas, ofrece información sobre la anatomía y los procesos de preservación de los dinosaurios.
Objetivo del estudio:
- Para investigar el mecanismo de preservación de las estructuras integumentarias en dos "momias" de Edmontosaurus annectens.
Principales métodos:
- Análisis del tejido fosilizado (piel, punzón, casco) mediante diversas pruebas.
- Examen microscópico de la capa de preservación del tejido.
Principales resultados:
- El integumento fosilizado se conserva como una fina plantilla de arcilla (de menos de 1 mm de espesor).
- Esta plantilla de arcilla se formó en la superficie de la canal durante la descomposición, antes de la pérdida de los tejidos blandos.
- Este proceso de plantilla es análogo al observado en entornos marinos anóxicos.
Conclusiones:
- El integumento de estas "momias" de Edmontosaurus se conserva como una máscara externa de arcilla, no como hueso permineralizado.
- Este modo de preservación proporciona un registro único de los tejidos blandos de los dinosaurios y los procesos de descomposición.
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