Wiwaxia is a genus of soft-bodied animals that were covered in carbonaceous scales and spines that protected it from predators. Wiwaxia fossils—mainly...
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common spongelike animal called Chancelloria; an armored slug-like form Wiwaxia; an armored worm with a pair of brachiopod-like shells Halkieria; and another...
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Halwaxiida (section Wiwaxia and Odontogriphus)
combining the names of two members of the proposed group, Halkieria and Wiwaxia. The group was defined as a set of Early to Mid Cambrian animals that had:...
43 KB (4,340 words) - 05:18, 8 November 2023
that Odontogriphus's feeding apparatus, which is "nearly identical" to Wiwaxia's, is an early version of the molluscan radula, a chitinous "tongue" that...
30 KB (3,121 words) - 06:11, 3 September 2024
"probable bilaterian", if that. There is an even sharper debate about whether Wiwaxia, from about 505 million years ago, was a mollusc, and much of this centers...
96 KB (9,722 words) - 07:15, 10 September 2024
Shale organisms, such as Canadia, may also have polychaete affinities. Wiwaxia, long interpreted as an annelid, is now considered to represent a mollusc...
31 KB (3,265 words) - 14:13, 19 September 2024
"great aunt" of annelids and Wiwaxia was an "aunt" of annelids. Their claim of a close relationship between halkieriids and Wiwaxia was based on both groups'...
63 KB (6,415 words) - 14:52, 14 July 2024
sclerites are very similar to those of its Burgess Shale contemporary Wiwaxia. Its shell is very similar to: one of the two Burgess Shale shell types...
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than "probable bilaterian". There is an even sharper debate about whether Wiwaxia, from about 505 million years ago, was a mollusc, and much of this centers...
27 KB (2,671 words) - 15:15, 30 July 2024
a stepping stone between the solid chaetae-like chitinous sclerites of Wiwaxia and the partially hollow, biomineralized sclerites of aculiferan molluscs...
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Butterfield, N.J. (1990). "A reassessment of the enigmatic Burgess Shale fossil Wiwaxia corrugata (Matthew) and its relationship to the polychaete Canadia spinosa...
78 KB (1,489 words) - 19:05, 16 September 2024
Butterfield, N. J. (1990). "A reassessment of the enigmatic Burgess Shale fossil Wiwaxia corrugata (Matthew) and its relationship to the polychaete Canadia spinosa...
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among Aplacophora, Polyplacophora, Gastropoda, and the Cambrian fossil Wiwaxia corrugata". Journal of Morphology. 257 (2): 219–245. doi:10.1002/jmor.10121...
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has been proposed to be a member of the order Phyllodocida along with Wiwaxia, another organism from the Burgess Shale. Both were placed in a new superfamily...
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There has been vigorous debate about whether the Burgess Shale fossil Wiwaxia was a mollusc or an annelid. Polychaetes diversified in the early Ordovician...
88 KB (9,008 words) - 20:26, 26 August 2024
academic who has so far published articles placing Wiwaxia closer to polychaetes, stated that Wiwaxia′s two-row feeding apparatus could not have performed...
94 KB (9,329 words) - 02:09, 24 September 2024
genus of bizarre stem-group arthropod distantly related to the radiodonts. Wiwaxia, a genus of possible mollusk that had copious numbers of carbonaceous scales...
44 KB (4,841 words) - 07:49, 10 September 2024
Hyolitha, Nematomorpha, Phoronida, and Chordata. Possible molluscs include Wiwaxia and Nectocaris. About one in eight animals are problematic forms of uncertain...
31 KB (3,059 words) - 16:28, 12 June 2024
arthropod class. Organisms such as the five-eyed Opabinia and spiny slug-like Wiwaxia were so different from anything else known that Whittington's team assumed...
134 KB (15,430 words) - 21:43, 22 September 2024
"Ontogeny, morphology and taxonomy of the soft-bodied Cambrian 'mollusc' Wiwaxia". Palaeontology. 57 (1): 215–229. Bibcode:2014Palgy..57..215S. doi:10.1111/pala...
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confirmed polyplacophorans date back to the Early Ordovician. Kimberella and Wiwaxia of the Precambrian and Cambrian may be related to ancestral polyplacophorans...
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Clockwise from top left: Marrella, Hallucigenia, Waptia, Sidneyia, Anomalocaris, Olenoides, Ottoia, Wiwaxia...
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from Cambrian sediments include the minute scales of priapulid worms, Wiwaxia sclerites, and arthropod feeding parts, for example. These organisms are...
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within the coeloscleritophorans: the Sachitids, to which Halkieria and Wiwaxia belong, and the Chancellorids. The Ediacaran fossil Ausia has been touted...
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"Spatiotemporal distribution and morphological diversity of the Cambrian Wiwaxia: New insights from South China". Global and Planetary Change. 239. 104507...
274 KB (24,848 words) - 08:28, 29 September 2024
Canadian Rockies of British Columbia, Canada. The Burgess Shale animal Wiwaxia corrugata is named after it. The nearest higher neighbor is Mount Huber...
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would have been a food source for such organisms as Odontogriphus and Wiwaxia. Carroll Lane Fenton (1943). "Pre-Cambrian and Early Paleozoic algae"....
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Varied soft bodied organisms are also locally preserved, including Naraoia, Wiwaxia and Hallucigenia. Marjum Formation 502 Ma Western Utah, US A site known...
196 KB (10,331 words) - 07:14, 28 September 2024
putatively compared with the mandibles of an Arthropod and the mouthparts of Wiwaxia and Odontogriphus. If it were to have been a jaw, it would have been used...
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of the chaetognaths; whilst teeth would be expected, a similar fossil, Wiwaxia, shows such structures in only 10% of the expected instances, and anomalocaridids...
10 KB (1,078 words) - 15:37, 28 September 2024