Yarnemia
Extinct genus of marine filter feeders From Wikipedia, the free encyclopedia
Yarnemia ascidiformis is a fossil tentatively classified as a tunicate. While Y. ascidiformis looks similar to tunicates, the oldest unequivocal tunicate, Shankouclava[1] dates to the Cambrian period, while Y. ascidiformis is Ediacaran in age.[2][3]
| Yarnemia Temporal range: | |
|---|---|
| |
| reconstruction as a tunicate-like animal | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Subphylum: | Tunicata (?) |
| Genus: | †Yarnemia Nesov in Chistyakov et al., 1984 |
| Species: | †Y. ascidiformis |
| Binomial name | |
| †Yarnemia ascidiformis Nesov in Chistyakov et al., 1984 | |
Discovery and name
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. The specific epithet, ascidiformis, refers to the likeness to ascidians.
Description
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.
See also
Other Ediacaran biota tentatively identified as tunicates include
References
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