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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crown group polyplacophore. There is an even sharper debate about whether Wiwaxia, from about 505 million years ago, was a mollusc, and much of this centers...
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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:...
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Shale organisms, such as Canadia, may also have polychaete affinities. Wiwaxia, long interpreted as an annelid, is now considered to represent a mollusc...
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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) - 07:55, 24 October 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'...
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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...
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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...
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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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academic who has so far published articles placing Wiwaxia closer to polychaetes, stated that Wiwaxia′s two-row feeding apparatus could not have performed...
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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 (9,010 words) - 20:54, 1 October 2024
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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genus of bizarre stem-group arthropod distantly related to the radiodonts. Wiwaxia, a genus of possible mollusk that had copious numbers of carbonaceous scales...
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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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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
"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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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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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 (15,441 words) - 16:06, 25 October 2024
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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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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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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New York: Basic Books, p. 229. Dawkins, Richard (1990). "Hallucigenia, Wiwaxia and Friends." Sunday Telegraph Feb. 25; reprinted in A Devil's Chaplain...
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biology Marine vertebrate List of marine aquarium invertebrate species Wiwaxia Myxozoa were thought to be an exception, but are now thought to be heavily...
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"Spatiotemporal distribution and morphological diversity of the Cambrian Wiwaxia: New insights from South China". Global and Planetary Change. 239. 104507...
315 KB (28,631 words) - 20:21, 28 October 2024
Varied soft bodied organisms are also locally preserved, including Naraoia, Wiwaxia and Hallucigenia. Marjum Formation 502 Ma Western Utah, US A site known...
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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...
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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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Clockwise from top left: Marrella, Hallucigenia, Waptia, Sidneyia, Anomalocaris, Olenoides, Ottoia, Wiwaxia...
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