| Takakkawia Temporal range: Chengjiang to Middle Cambrian PreꞒ Ꞓ O S D C P T J K Pg N | |
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| Reconstruction of Takakkawia lineata | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Porifera |
| Class: | Demospongiae |
| Order: | †Protomonaxonida |
| Family: | †Takakkawiidae |
| Genus: | †Takakkawia Walcott, 1920 |
| Species | |
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Takakkawia is a genus of sponge in the order Protomonaxonida and the family Takakkawiidae. It is known from the Middle Cambrian Burgess Shale that reached around 4 cm in height. Its structure comprises four columns of multi-rayed, organic spicules (perhaps originally calcareous or siliceous) that align to form flanges. The spicules form blade-like structures, ornamented with concentric rings.
It was first described in 1920 by Charles Doolittle Walcott. Takakkaw Falls which mark the start of the trail to Fossil Ridge. 1377 specimens of Takakkawia are known from the Greater Phyllopod bed, where they comprise 2.62% of the community.
References
- Botting, J. (November–December 2007). "'Cambrian' demosponges in the Ordovician of Morocco: Insights into the early evolutionary history of sponges". Geobios. 40 (6): 737–748. Bibcode:2007Geobi..40..737B. doi:10.1016/j.geobios.2007.02.006.
- ^ Botting, J. P.; Jin, J. (2012). "Reassessment of the problematic Burgess Shale spongeTakakkawia lineataWalcott, 1920". Canadian Journal of Earth Sciences. 49 (9): 1087. Bibcode:2012CaJES..49.1087B. doi:10.1139/e2012-046.
- Walcott, C. D. (1920). "Cambrian geology and paleontology IV:6—Middle Cambrian Spongiae". Smithsonian Miscellaneous Collections. 67: 261–364.
- J.J. Sepkoski, D. Jablonski & M. Foote (2002). "A compendium of fossil marine animal genera".
{{cite journal}}: Cite journal requires|journal=(help) - 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.
External links
- "Takakkawia lineata". Burgess Shale Fossil Gallery. Virtual Museum of Canada. 2011. Archived from the original on 2020-11-12.
- Image of fossil from the Peabody Museum of Natural History
- Takakkawia at fossilworks
| Taxon identifiers | |
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| Takakkawia | |
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