Biology:Louisella
| Louisella | |
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| Retouched images from Walcott's description of Miskoia, now synonymized with Louisella | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Stem group: | Priapulida (?) |
| Class: | †Archaeopriapulida |
| Family: | †Miskoiidae |
| Genus: | †Louisella Walcott, 1911 |
| Species | |
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Louisella is a genus of worm known from the Middle Cambrian Burgess Shale. It was originally described by Charles Walcott in 1911 as a holothurian echinoderm,[1] and represents a senior synonym of Miskoia, which was originally described as an annelid.[2] 48 specimens of Louisella are known from the Greater Phyllopod bed, where they comprise < 0.1% of the community.[3] It has been stated to have palaeoscolecid-like sclerites,[4] though this is not in fact the case.[5]
It's also been interpreted as an annelid [6] and a sipunculan,[7] (neither on particularly compelling grounds) and a pripaulid,[8] but it is more conservatively considered to represent an ecdysozoan worm;[5] deep ecdysozoan relationships are not yet well resolved, making a more precise affiliation challenging.
References
- ↑ Durham, J. W. (1974). "Systematic Position of Eldonia ludwigi Walcott". Journal of Paleontology 48 (4): 750–755.
- ↑ Walcott, C. D. (1911). "Cambrian Geology and Paleontology II. Middle Cambrian annelids". Smithsonian Miscellaneous Collections 57 (5): 109–145. https://en.wikisource.org/wiki/Page:Walcott_Cambrian_Geology_and_Paleontology_II.djvu/180.
- ↑ 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. Bibcode: 2006Palai..21..451C.
- ↑ Conway Morris, S. (1997). "The cuticular structure of the 495-Myr-old type species of the fossil worm Palaeoscolex, P. piscatorum (?Priapulida)". Zoological Journal of the Linnean Society 119: 69–82. doi:10.1111/j.1096-3642.1997.tb00136.x.
- ↑ 5.0 5.1 Smith, M.R. 2015: A palaeoscolecid worm from the Burgess Shale. Palaeontology 58, 973–979. doi: 10.1111/pala.12210
- ↑ Madsen, F.J. 1957: On Walcott’s Supposed Cambrian Holothurians. Journal of Paleontology 31, 281–282.
- ↑ Howell, B.F. 1962: Worms. In Moore, R. C. (ed.), Treatise on Invertebrate Paleontology W (Miscellanea), W144–W177. Geological Society of America, New York.
- ↑ Conway Morris, S. 1977: Fossil priapulid worms. Special Papers in Palaeontology 20, 1–95.
External links
- "Louisella pedunculata". Burgess Shale Fossil Gallery. Virtual Museum of Canada. 2011. http://burgess-shale.rom.on.ca/en/fossil-gallery/view-species.php?id=75.
Wikidata ☰ Q6689030 entry
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