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Fósiles parecidos a quitrídeos de la edad de Pensilvania

M A Millay, T N Taylor

Science (New York, N.Y.)

|June 9, 1978

Resumen

Se descubrieron hongos fosilizados parecidos a quitrídeos dentro de los granos de polen de la era de Pensilvania. Estos antiguos hongos, que exhiben estructuras reproductivas clave, sugieren vínculos evolutivos tempranos con los Chytridiales modernos.

Área de la Ciencia:

La paleomicología.
La paleobotánica es la paleobotánica.
Los hongos fósiles son hongos que se han convertido en fósiles.

Sus antecedentes:

El registro fósil de los primeros hongos es escaso, particularmente en lo que respecta a los organismos microscópicos.
Comprender la evolución de los hongos requiere examinar los microfósiles conservados en las estructuras vegetales antiguas.

Objetivo del estudio:

Describir y clasificar nuevas esporangías fúngicas de tipo quitrida que se encuentran en el polen de sacatos de la edad de Pensilvania.
Para inferir relaciones filogenéticas de estos hongos fósiles basados en características morfológicas.

Principales métodos:

Examen microscópico de los granos de polen de sacatos fosilizados de los estratos de Pensilvania.
Análisis morfológico detallado de esporangías fúngicas, incluidos rizóides y estructuras de descarga.

Principales resultados:

Identificación de las esporangías fúngicas endobióticas y epibióticas de tipo quitrida dentro del polen fósil.
Observación de las características de diagnóstico tales como papilas de descarga y rizomicelio grueso.
Presencia de un cuerpo refractario en presuntas zoosporas, indicativo de Chytridiales.

Conclusiones:

Los hongos fósiles descritos representan ocurrencias tempranas de organismos similares a los quitridos.
Las similitudes morfológicas sugieren fuertemente una relación filogenética con el orden existente Chytridiales.

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