This name for this is Ganoderma applanatum – doesn’t really roll of the tongue. Instead of the scientific or commonly used name, make one up. In this case, how about ‘knick knack shelves’?
Here are a few other examples, but I’m sure you can top these.
Forest Accordion
Yellow Dog
This jelly fungi has a common name that suits the approach of Halloween – orange witches butter.
Blue Whale Pod
???
Do you have a name for this one, and perhaps another for the superhero action figure on the knick knack shelf?
Play Outside Now 