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I have been unable to find a common name for this fungus or any kind of written description. The ones pictured were very small, less than 4 cm. tall. It consists of vertical folds inside one another, like a loosely rolled scroll. The inside is bright reddish brown with typical rings and the outside (underside-foto #3) is a dull reddish brown. The upper edge has a white rim.
This genus if found widely in tropical regions. This one was found on a log in permanent shade along a covered trail deep in the Amazon rainforest of SE Ecuador very close to the Peruvian border.
I have not been able to find any articles that tell much about this fungus. The ID is made from an identical picture in the link shown in the Reference box. It seems like an unusual form for a fungus.