Yarnemia
| Yarnemia Temporal range: Ediacaran,
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|---|---|
| File:Yarnemia acidiformis.jpg | |
| Reconstruction as a tunicate-like animal | |
Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Subphylum: | Tunicata (?) |
| Genus: | †Yarnemia Nesov in Chistyakov et al., 1984 |
| Species: | †Y. ascidiformis
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| Binomial name | |
| †Yarnemia ascidiformis Nesov in Chistyakov et al., 1984
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Yarnemia ascidiformis is a fossil tentatively classified as a tunicate. While Y. ascidiformis looks similar to tunicates, the oldest unequivocal tunicate, Shankouclava[2] dates to the Cambrian period, while Y. ascidiformis is Ediacaran in age.[3]
Discovery and name
[edit | edit source]The holotype fossil of Yarnemia was found from the Ustʹ Pinega Formation between 1976 and 1978, and described in 1984.[4]
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.[4]
Description
[edit | edit source]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
[edit | edit source]Other Ediacaran biota tentatively identified as tunicates include
References
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Chen, Jun-Yuan, et al. "The first tunicate from the Early Cambrian of South China." Proceedings of the National Academy of Sciences 100.14 (2003): 8314-8318.
- ^ University of California Museum of Paleontology Berkeley
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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