Biology:Pywackia
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Short description: Extinct genus of aquatic animals
| Pywackia | |
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| Artist's restoration | |
Scientific classification 
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| Missing taxonomy template (fix): | Incertae sedis/Metazoa |
| Genus: | †Pywackia |
| Species: | †P. baileyi
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| Binomial name | |
| †Pywackia baileyi Landing in Landing et al., 2010
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Pywackia is a contentious Cambrian fossil that has been interpreted as the earliest (total group) Bryozoan, and the only representative of that phylum in the Cambrian period.[1] Its Bryozoan credentials have been called into question,[2] but the octocoral alternative is equally unconvincing, and there are reasons to suggest a position in the Stenolaemata stem lineage.[3] Finally, the skeletal microstructure is consistent with a cnidarian affinity, but insufficient to support a close affinity with any modern subgroup.[4]
References
- ↑ Landing, E.; English, A.; Keppie, J. D. (2010). "Cambrian origin of all skeletalized metazoan phyla--Discovery of Earth's oldest bryozoans (Upper Cambrian, southern Mexico)". Geology 38 (6): 547. doi:10.1130/G30870.1. Bibcode: 2010Geo....38..547L.
- ↑ Taylor, P. D.; Berning, B. R.; Wilson, M. A. (2013). "Reinterpretation of the Cambrian 'Bryozoan' Pywackia as an Octocoral". Journal of Paleontology 87 (6): 984. doi:10.1666/13-029. Bibcode: 2013JPal...87..984T. https://zenodo.org/record/907861.
- ↑ Ed Landing; Jonathan B. Antcliffe; Martin D. Brasier; Adam B. English (2015). "Distinguishing Earth's oldest known bryozoan (Pywackia, late Cambrian) from pennatulacean octocorals (Mesozoic—Recent)". Journal of Paleontology 89 (2): 292–317. doi:10.1017/jpa.2014.26. Bibcode: 2015JPal...89..292L.
- ↑ Hageman, Steven J.; Vinn, Olev (2023). "Late Cambrian Pywackia is a cnidarian, not a bryozoan: Insights from skeletal microstructure". Journal of Paleontology: 1–12. doi:10.1017/jpa.2023.35.
Wikidata ☰ Q20817953 entry
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