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El origen temprano de un oído interno parecido a un pájaro y la evolución del movimiento y la vocalización de los

Michael Hanson^1,2, Eva A Hoffman³, Mark A Norell³

¹Department of Earth and Planetary Sciences, Yale University, New Haven, CT, USA.

Science (New York, N.Y.)

|May 7, 2021

Resumen

La estructura del oído interno en los reptiles, incluidas las aves, refleja adaptaciones para la locomoción y la audición. Tres morfotipos vestibulares se correlacionan con distintas categorías locomotoras, desde el vuelo cuadrúpedo hasta el de alta maniobrabilidad.

Área de la Ciencia:

Paleontología
Anatomía comparada
La bioacústica

Sus antecedentes:

Los reptiles, incluidas las aves, muestran diversas adaptaciones de comportamiento que afectan su estructura del oído interno.
Estas adaptaciones están vinculadas a funciones como el vuelo y la detección de sonidos de alta frecuencia.

Objetivo del estudio:

Investigar la relación entre la morfología del oído interno y las habilidades locomotoras y la agudeza auditiva en los reptiles.
Para analizar los cambios evolutivos en el oído interno de los reptiles.

Principales métodos:

Utilizó análisis morfométricos tridimensionales en una muestra completa de reptiles existentes y extintos.
Análisis estadísticos aplicados para identificar correlaciones entre la estructura del oído interno y la locomoción/audición.

Principales resultados:

Se identificaron tres morfotipos vestibulares distintos que corresponden a la locomoción de vuelo cuadrúpeda, bípeda y simple / de alta maniobrabilidad.
Troodontids y Archaeopteryx fueron clasificados con voladores de baja maniobrabilidad.
Elongamiento coclear observado en los primeros archosaurios, potencialmente relacionado con la comunicación auditiva.

Conclusiones:

La estructura del oído interno proporciona información sobre la evolución de la locomoción y las capacidades sensoriales en los reptiles.
Los cambios cocleares en Archosauria pueden reflejar el desarrollo de vocalizaciones complejas y procesamiento auditivo.

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