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Protistas terrestres de cuerpo blando y otros microorganismos en el ámbar triásico
Science (New York, N.Y.)
|January 8, 1993
Resumen
Antiguos microorganismos, incluidos protistas y hongos, preservados en ámbar de 220 millones de años de antigüedad revelan una evolución morfológica gradual. Esto sugiere estancamiento a largo plazo en muchos grupos protistas que se remontan al período Triásico Superior.
Área de la Ciencia:
- Paleontología Paleontología.
- Microbiología Microbiología.
- Biología evolutiva Biología evolutiva.
Sus antecedentes:
- Los microorganismos fosilizados proporcionan información sobre la vida antigua.
- Las inclusiones de ámbar ofrecen una excepcional preservación de los organismos de cuerpo blando.
Objetivo del estudio:
- Investigar la diversidad y las implicaciones evolutivas de los microorganismos conservados en el ámbar del Triásico Superior.
Principales métodos:
- Examen microscópico de microorganismos dentro de muestras de ámbar.
- Clasificación taxonómica de los microbios antiguos comparándolos con los grupos existentes.
Principales resultados:
- Descubrimiento de diversos microorganismos incluyendo protozoos, cianobacterias, algas, hongos, polen y esporas en ámbar de 220-230 millones de años de antigüedad.
- Muchos microorganismos identificados podrían ser asignados a los grupos taxonómicos actuales.
- La preservación de los protistas terrestres de cuerpo blando indica su antigua presencia.
Conclusiones:
- La evolución morfológica en muchos protistas es excepcionalmente gradual.
- El estancamiento estructural y funcional en los protistas se remonta al menos al período Triásico Superior.
- Proporciona evidencia de la estabilidad a largo plazo de los linajes microbianos.
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