Takakkawia
| Takakkawia Temporal range: Chengjiang to Middle Cambrian | |
|---|---|
 | |
| Reconstruction of Takakkawia lineata | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | "Porifera" |
| Stem group: | Demospongiae |
| Genus: | †Takakkawia Walcott, 1920 |
| Species | |
| |
Takakkawia is a genus of sponge known from the Middle Cambrian Burgess Shale that reached around 4 cm in height.[1] Its structure comprises four columns of multi-rayed, organic spicules (perhaps originally calcareous or siliceous) that align to form flanges.[2] The spicules form blade-like structures, ornamented with concentric rings.[2]
It was named by Walcott after the Takakkaw falls which mark the start of the trail to Fossil Ridge.[3] 1377 specimens of Takakkawia are known from the Greater Phyllopod bed, where they comprise 2.62% of the community.[4]
References
- ↑ Botting, J. (2007). "‘Cambrian’ demosponges in the Ordovician of Morocco: Insights into the early evolutionary history of sponges". Geobios 40 (6): 737–748. doi:10.1016/j.geobios.2007.02.006.
- 1 2 Botting, J. P.; Jin, J. (2012). "Reassessment of the problematic Burgess Shale spongeTakakkawia lineataWalcott, 1920". Canadian Journal of Earth Sciences 49 (9): 1087. doi:10.1139/e2012-046.
- ↑ J.J. Sepkoski, D. Jablonski & M. Foote (2002). "A compendium of fossil marine animal genera".
- ↑ Caron, Jean-Bernard; Jackson, Donald A. (October 2006). "Taphonomy of the Greater Phyllopod Bed community, Burgess Shale". PALAIOS 21 (5): 451–65. doi:10.2110/palo.2003.P05-070R. JSTOR 20173022.
External links
- "Takakkawia lineata". Burgess Shale Fossil Gallery. Virtual Museum of Canada. 2011.
- Image of fossil from the Peabody Museum of Natural History
This article is issued from Wikipedia - version of the Wednesday, April 27, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.