Yuknessia Explained

Yuknessia is an early pterobranch, known from the Burgess shale, the Chengjiang and the Wheeler shale. Long, unbranched fronds emerge from a central holdfast-like body covered in small conical plates. 23 specimens of Yuknessia are known from the Greater Phyllopod bed, where they comprise < 0.1% of the community.^[1] 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.^{[3] [4]}

External links

• "Yuknessia simplex". Burgess Shale Fossil Gallery. Virtual Museum of Canada. 2011. (Burgess Shale species 136)

Notes and References

1. Caron . Jean-Bernard. Jackson . Donald A.. Taphonomy of the Greater Phyllopod Bed community, Burgess Shale. PALAIOS . 21 . 5 . 451–65. October 2006. 10.2110/palo.2003.P05-070R. 20173022. 2006Palai..21..451C . 53646959 .
2. Steven T. LoDuca. Jean-Bernard Caron. James D. Schiffbauer. Shuhai Xiao. Anthony Kramer. amp . 2015 . A reexamination of Yuknessia from the Cambrian of British Columbia and Utah . Journal of Paleontology . 89 . 1 . 82–95 . 10.1017/jpa.2014.7 . 2015JPal...89...82L . 129248278. free .
3. Michael Steiner . Jörg Maletz . amp . 2012 . Cambrian graptolites (Pterobranchia) and the origin of colonial organization in metazoans . TERRA NOSTRA – Schriften der GeoUnion Alfred-Wegener-Stiftung. Centenary Meeting of the Paläontologische Gesellschaft. Programme, Abstracts, and Field Guides . 2012/3 . 173–174 .
4. 10.1111/pala.12200. Graptolite (Hemichordata, Pterobranchia) preservation and identification in the Cambrian Series 3. 2015. Maletz. Jörg. Steiner. Michael. Palaeontology. 58. 6. 1073–1107. 2015Palgy..58.1073M . 129341868 . free.