| Yuknessia Temporal range: Chengjiang-Burgess Shale
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| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | |
| Genus: | Yuknessia
Walcott, 1919
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| Species | |
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Yuknessia is an early pterobranch, known from the Burgess shale, [1] the Chengjiang and the Wheeler shale. [2] Long, unbranched fronds emerge from a central holdfast-like body covered in small conical plates. [1] 23 specimens of Yuknessia are known from the Greater Phyllopod bed, where they comprise < 0.1% of the community. [3] The genus contains two species: the type species Y. simplex and Y. stephenensis. [2] It was originally interpreted as a green alga, and has since been reinterpreted it as a colonial pterobranch. [2] [4] [5]
References
- ^ a b Briggs, D. E. G.; Erwin, D. H.; Collier, F. J. (1995), Fossils of the Burgess Shale, Washington: Smithsonian Inst Press, ISBN 1-56098-659-X, OCLC 231793738
- ^ a b c Steven T. LoDuca; Jean-Bernard Caron; James D. Schiffbauer; Shuhai Xiao & Anthony Kramer (2015). "A reexamination of Yuknessia from the Cambrian of British Columbia and Utah". Journal of Paleontology. 89 (1): 82–95. Bibcode: 2015JPal...89...82L. doi: 10.1017/jpa.2014.7. S2CID 129248278.
- ^ Caron, Jean-Bernard; Jackson, Donald A. (October 2006). "Taphonomy of the Greater Phyllopod Bed community, Burgess Shale". PALAIOS. 21 (5): 451–65. Bibcode: 2006Palai..21..451C. doi: 10.2110/palo.2003.P05-070R. JSTOR 20173022. S2CID 53646959.
- ^ Michael Steiner & Jörg Maletz (2012). "Cambrian graptolites (Pterobranchia) and the origin of colonial organization in metazoans" (PDF). TERRA NOSTRA – Schriften der GeoUnion Alfred-Wegener-Stiftung. Centenary Meeting of the Paläontologische Gesellschaft. Programme, Abstracts, and Field Guides. 2012/3: 173–174.
- ^ Maletz, Jörg; Steiner, Michael (2015). "Graptolite (Hemichordata, Pterobranchia) preservation and identification in the Cambrian Series 3". Palaeontology. 58 (6): 1073–1107. Bibcode: 2015Palgy..58.1073M. doi: 10.1111/pala.12200. S2CID 129341868.
External links
- "Yuknessia simplex". Burgess Shale Fossil Gallery. Virtual Museum of Canada. 2011. (Burgess Shale species 136)
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| Yuknessia Temporal range: Chengjiang-Burgess Shale
| |
|---|---|
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | |
| Genus: | Yuknessia
Walcott, 1919
|
| Species | |
| |
Yuknessia is an early pterobranch, known from the Burgess shale, [1] the Chengjiang and the Wheeler shale. [2] Long, unbranched fronds emerge from a central holdfast-like body covered in small conical plates. [1] 23 specimens of Yuknessia are known from the Greater Phyllopod bed, where they comprise < 0.1% of the community. [3] The genus contains two species: the type species Y. simplex and Y. stephenensis. [2] It was originally interpreted as a green alga, and has since been reinterpreted it as a colonial pterobranch. [2] [4] [5]
References
- ^ a b Briggs, D. E. G.; Erwin, D. H.; Collier, F. J. (1995), Fossils of the Burgess Shale, Washington: Smithsonian Inst Press, ISBN 1-56098-659-X, OCLC 231793738
- ^ a b c Steven T. LoDuca; Jean-Bernard Caron; James D. Schiffbauer; Shuhai Xiao & Anthony Kramer (2015). "A reexamination of Yuknessia from the Cambrian of British Columbia and Utah". Journal of Paleontology. 89 (1): 82–95. Bibcode: 2015JPal...89...82L. doi: 10.1017/jpa.2014.7. S2CID 129248278.
- ^ Caron, Jean-Bernard; Jackson, Donald A. (October 2006). "Taphonomy of the Greater Phyllopod Bed community, Burgess Shale". PALAIOS. 21 (5): 451–65. Bibcode: 2006Palai..21..451C. doi: 10.2110/palo.2003.P05-070R. JSTOR 20173022. S2CID 53646959.
- ^ Michael Steiner & Jörg Maletz (2012). "Cambrian graptolites (Pterobranchia) and the origin of colonial organization in metazoans" (PDF). TERRA NOSTRA – Schriften der GeoUnion Alfred-Wegener-Stiftung. Centenary Meeting of the Paläontologische Gesellschaft. Programme, Abstracts, and Field Guides. 2012/3: 173–174.
- ^ Maletz, Jörg; Steiner, Michael (2015). "Graptolite (Hemichordata, Pterobranchia) preservation and identification in the Cambrian Series 3". Palaeontology. 58 (6): 1073–1107. Bibcode: 2015Palgy..58.1073M. doi: 10.1111/pala.12200. S2CID 129341868.
External links
- "Yuknessia simplex". Burgess Shale Fossil Gallery. Virtual Museum of Canada. 2011. (Burgess Shale species 136)
|
| This prehistoric deuterostome-related article is a stub. You can help Wikipedia by expanding it. |
|
| This hemichordate-related article is a stub. You can help Wikipedia by expanding it. |