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Una conexión ósea señala la ecolocalización laríngea en los murciélagos
Nina Veselka1, David D McErlain, David W Holdsworth
1Department of Biology, Robarts Research Institute.
Nature
|January 26, 2010
Resumen
Un bate es un bate.
Área de la Ciencia:
- La anatomía comparada es una anatomía comparada.
- Biología evolutiva Biología evolutiva.
- La bioacústica es la bioacústica.
Sus antecedentes:
- La ecolocalización, utilizada por los murciélagos para navegar, no es universal entre las especies.
- La mayoría de los murciélagos usan la ecolocalización laríngea, pero algunos Pteropodidae (murciélagos frutales) usan clics de lengua.
- La articulación del hueso estilojal con el hueso timpánico es clave para comprender los orígenes de la ecolocación.
Objetivo del estudio:
- Para identificar un marcador anatómico distinto para la ecolocación laríngea en murciélagos.
- Para investigar la historia evolutiva de la ecolocalización en murciélagos, incluidas las especies fósiles.
- Para diferenciar entre los mecanismos de ecolocalización laríngea y no laríngea.
Principales métodos:
- Tomografías computarizadas (TC) de 35 murciélagos de 26 especies.
- Análisis de la articulación del hueso estilohial con el hueso timpánico.
- Análisis morfológico comparativo entre diversas familias de murciélagos.
Principales resultados:
- La articulación proximal del hueso estilojal con el hueso timpánico identifica consistentemente los ecolocadores laríngeos.
- Esta articulación a menudo se fusiona en los murciélagos utilizando la ecolocación laríngea.
- El murciélago fósil Onychonycteris finneyi puede haber utilizado la ecolocación laríngea basada en su morfología estilohial-tympanic.
Conclusiones:
- La articulación ósea estilohial-tympanic proporciona un carácter anatómico confiable para la identificación de murciélagos ecolocadores laríngeos.
- Este hallazgo desafía las suposiciones anteriores sobre las capacidades de ecolocalización de los primeros murciélagos como Onychonycteris finneyi.
- El estudio ofrece nuevos conocimientos sobre la evolución y el momento del vuelo y la ecolocalización en murciélagos.
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