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El recumbirostrano carbonífero aclara los orígenes del herbívoro terrestre

Arjan Mann¹, Zifang Xiong², Ami S Calthorpe²

¹Negaunee Integrative Research Center, Field Museum of Natural History, Chicago, IL, USA.

Nature ecology & evolution

|February 10, 2026

Resumen

La evolución temprana de los tetrápodos vio un rápido desarrollo del herbívoro en los pantilídeos.

Área de la Ciencia:

Paleontología Paleontología.
Biología evolutiva Biología evolutiva.
Paleontología de los vertebrados.

Sus antecedentes:

La evolución del herbívoro en los vertebrados terrestres fue un evento ecológico fundamental.
El herbívoro surgió de forma independiente en múltiples grupos de tetrápodos durante los períodos Carbonífero Tardío y Pérmico.
Esto condujo al establecimiento de modernas estructuras de ecosistemas terrestres.

Objetivo del estudio:

Para describir un nuevo "microsaurio" pantilídeo del Carbonífero Tardío, el Tyrannoroter heberti gen. et sp. Nov. Nov. Es decir, el nov.
Para investigar los orígenes y la evolución temprana del herbívoro en tetrápodos.
Para analizar las adaptaciones dentales para el herbívoro en los primeros tetrápodos.

Principales métodos:

Tomografía microcomputada de alta resolución (micro-CT) escaneo de dientes fósiles.
Análisis de la morfología de la batería dental y patrones de desgaste de los dientes.
Análisis filogenético que incorpora nuevos datos fósiles.

Principales resultados:

Tyrannoroter heberti exhibe baterías dentales adaptadas tanto para el corte como para la molienda, lo que indica su herbivoría.
La evidencia fósil sugiere que el herbívoro estaba muy extendido en los pantílidos ya en el Bashkirian (hace ~ 318 millones de años).
Estas adaptaciones para el herbívoro terrestre se originaron rápidamente después de la terrestrización de los tetrápodos.

Conclusiones:

Pantílidos independientemente adquirido herbívoros, probablemente a través de una dieta de insectos, animales con cáscara, y las plantas resistentes.
El herbívoro terrestre no es exclusivamente una innovación amniótica, que precede o coevoluciona con los primeros amniotas.
El estudio destaca la rápida diversificación de las estrategias de alimentación en los primeros vertebrados terrestres.

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