Yarnemia
| Yarnemia | ||||||||
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Reconstruction of Yarnemia as a tunicat-like organism |
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| Ediacarium | ||||||||
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| Scientific name | ||||||||
| Yarnemia | ||||||||
| Nessov , in Chistyakov et al., 1984 | ||||||||
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Yarnemia is an extinct animal genus of the Ediacarium , which may have been related to the tunicates .
Etymology and first description
The generic name Yarnemia is derived from the northern Russian village of Jarnema ( Plesezki rajon , Arkhangelsk Oblast ) on the Onega , where the first fossil finds were made. The species name ascidiformis refers to the similarity with the sea squirts (Ascidiae). The first scientific description was in 1984 by Nessov in Chistyakov, VG and colleagues.
description
The fossil Yarnemia ascidiformis , which in its outer shape is very similar to a potato , is taxonomically assigned to the tunicates for the time being. The so far oldest known tuniculate Shankouclava comes from the Cambrian , whereas Yarnemia belongs to the Ediacarian.
See also
Other Ediacara biota , which are also counted among the tunicates:
Individual evidence
- ↑ Chistyakov, VG, Kalmykova, NA, Nessov, LA and Suslov, GA: наличии вендских отложений в среднем течении р. Онеги и возможном существовании оболочечников (Tunicata: Chordata) в докембрии . In: Vest. Leningrad Gos. Univ. tape 6 , 1984, pp. 11-19 . (Digitized version)
- ↑ Chen, Jun-Yuan et al .: The first tunicate from the Early Cambrian of South China . In: Proceedings of the National Academy of Sciences . tape 100.14 , 2003, p. 8314-8318 .