Yarnemia ascidiformis is a fossil tentatively classified as a tunicate.

[2][3] The holotype fossil of Yarnemia was found from the Ust-Pinega Formation between 1976 and 1978, and described in 1984.

The generic name Yarnemia comes from the village of Yarnema near which the first specimens were found.

Yarnemia ascidiformis is a possible tunicate, growing up to 30 mm (1.2 in) in length, with the standard oblong body and two openings, or siphons, on the top of the body to allow water to flow through them.

Other Ediacaran biota tentatively identified as tunicates include