Yuknessia
| Yuknessia Temporal range: Chengjiang-Burgess Shale
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| Genus: | Yuknessia Walcott, 1919
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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] Template:Gpb abundance 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][3][4]
External links
- "Yuknessia simplex". Burgess Shale Fossil Gallery. Virtual Museum of Canada. 2011. (Burgess Shale species 136)
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 and Anthony Kramer (2015). "A reexamination of Yuknessia from the Cambrian of British Columbia and Utah". Journal of Paleontology. 89 (1): 82–95. doi:10.1017/jpa.2014.7.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ 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.
{{cite journal}}: Unknown parameter|lastauthoramp=ignored (|name-list-style=suggested) (help) - ^ "Graptolite (Hemichordata, Pterobranchia) preservation and identification in the Cambrian Series 3". doi:10.1111/pala12200 (inactive 2018-09-11).
{{cite journal}}: Cite journal requires|journal=(help)CS1 maint: DOI inactive as of September 2018 (link)
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