Español: Reconstrucción artística del vegetal del Devónico inferior Pertica quadrifaria realizada a partir de la descripción dada de sus restos fósiles del yacimiento paleontológico de Trout Valley. Se añade un detalle de la inserción en espiral de sus ramas laterales, de la división dicotómica de éstas y del clúster esférico de esporangios que poseían.
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