Quaestio is an early motile marine animal which lived 555 million years ago in the Upper Ediacaran.

It is the earliest known animal to bear evidence of left-right asymmetry.

[1] At least four trace fossils were discovered as well, some a few centimeters behind the death-mask of the maker, and some without their maker present, showing that the animal was capable of movement, which direction it moved and its anterior and posterior regions.

The specific name simpsonorum is the Latinisation of the surname of philanthropists Mary Lou and Antony Simpson, in honor of their contributions to the research and conservation of Ediacaran fossil materials.

[1] Quaestio has a near smooth circular margin, broken by a V-shaped notch at the posterior end of the animal.