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Studying the Neural Basis of Adaptive Locomotor Behavior in Insects

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Un tetrápodo devónico de América del Norte.

E B Daeschler, N H Shubin, K S Thomson

Science (New York, N.Y.)

|July 29, 1994

Resumen

Un recientemente descubierto fósil de tetrápodos tempranos de Pensilvania retrasa la línea de tiempo de los tetrápodos en América del Norte. Este hallazgo sugiere que los primeros tetrápodos tenían un desarrollo avanzado de las extremidades y una amplia distribución global.

Área de la Ciencia:

Paleontología Paleontología.
Evolución de los vertebrados.
Período Devónico Período Devónico.

Sus antecedentes:

Los tetrápodos representan una transición evolutiva fundamental de la vida acuática a la terrestre.
El registro fósil temprano de los tetrápodos es crucial para comprender sus orígenes evolutivos y diversificación.
El período Devónico Superior marca un momento crítico para el surgimiento de los primeros tetrápodos.

Objetivo del estudio:

Documentar y describir un nuevo fósil temprano de tetrápodos de la Formación Catskill en Pensilvania.
Extender el rango temporal y geográfico conocido de los primeros tetrápodos.
Para inferir la morfología funcional y las capacidades locomotoras de los primeros tetrápodos.

Principales métodos:

Excavación y preparación de fósiles.

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Análisis anatómico comparativo de la cintura pectoral y el esqueleto.

La reconstrucción paleogeográfica. reconstrucción paleogeográfica.

Principales resultados:

Descubrimiento de un fósil temprano de tetrápodos que extiende el rango temporal de América del Norte.
Evidencia de características derivadas del cinturón del hombro que indican un soporte apendicular y propulsión bien desarrollados.
Morfología especializada del esqueleto pectoral que sugiere una importante diversidad temprana de tetrápodos y una locomoción innovadora.

Conclusiones:

Los primeros tetrápodos lograron una distribución ecuatorial casi global hacia el final del Devónico.
La locomoción apendicular era sofisticada incluso en los primeros tetrápodos.
La diversidad y las estrategias locomotoras de los primeros tetrápodos fueron probablemente subestimadas.