Yarnemia ascidiformis is a fossil tentatively classified as a tunicate. While Y. ascidiformis looks similar to tunicates, the oldest unequivocal tunicate, Shankouclava dates to the Cambrian period, while Y. ascidiformis is Ediacaran in age. Etymology The generic name Yarnemia comes from the village of Yarnema near which the first specimens were found. The specific epithet, ascidiformis, refers to the likeness to ascidians. See also Other Ediacaran biota tentatively identified as tunicates include Ausia fenestrata Burykhia hunti References Ediacaran life Tunicate genera Prehistoric chordate genera Fossil taxa described in 1984