Yunnan Province, China, ~518 million years old. *Cotyledion* lived on the sea floor, using **tentacles** to feed on particles suspended in the water. Some individuals have been found attached to small fragment of trilobites. The overall body shape, presence of tentacles surrounding the mouth and U-shaped gut, are characters that unite *Cotyledion* with entoprocts – a modern group of animals that measure less than a centimetre across. Created for the First Animals exhibition at Oxford University Museum of Natural History: www.oum.ox.ac.uk/firstanimals Model by Mighty Fossils: www.mightyfossils.com