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'Canadia' is an extinct genus of polychaete annelid known from fossils found in the Burgess Shale formation of British Columbia.
Averaging about 30 millimeters in length, ''Canadia'' is one of the most photogenic of the Burgess Shale fossils. The head bore a pair of slender tentacles while the body was covered with innumerable setae (short bristles). The gut could be everted anteriorly to form a feeding proboscis. Sediment has never been found in the gut, suggesting that this worm may have been a carnivore or scavenger.
It is believed ''Canadia'' used its limbs to walk on the substrate or swim just above it. It may have utilized the stiff bristles on its body as paddles. These bristles could have been spread apart to swim and clumped together to slow down.
''Canadia'' would have borne colour, hosting an iridescent sheen. Colour in Burgess Shale animals and the effect of light on evolution in the Cambrian, Parker, A.R., , , Proceedings of the Royal Society B: Biological Sciences, 1998
The name of the one described species, ''Canadia spinosa'', means "spiny, or horny Canadian". One hundred and ninety specimens are known from the Burgess Shale.
''Hallucigenia sparsa'', now considered to be member of the taxon lobopodia, was originally described as being a member of this genus, until Simon Conway Morris recognized it as not being a polychaete.
★ Genus: ''Canadia spinosa'' - from the Smithsonian Institution.
'Canadia' is an extinct genus of polychaete annelid known from fossils found in the Burgess Shale formation of British Columbia.
Averaging about 30 millimeters in length, ''Canadia'' is one of the most photogenic of the Burgess Shale fossils. The head bore a pair of slender tentacles while the body was covered with innumerable setae (short bristles). The gut could be everted anteriorly to form a feeding proboscis. Sediment has never been found in the gut, suggesting that this worm may have been a carnivore or scavenger.
It is believed ''Canadia'' used its limbs to walk on the substrate or swim just above it. It may have utilized the stiff bristles on its body as paddles. These bristles could have been spread apart to swim and clumped together to slow down.
''Canadia'' would have borne colour, hosting an iridescent sheen. Colour in Burgess Shale animals and the effect of light on evolution in the Cambrian, Parker, A.R., , , Proceedings of the Royal Society B: Biological Sciences, 1998
The name of the one described species, ''Canadia spinosa'', means "spiny, or horny Canadian". One hundred and ninety specimens are known from the Burgess Shale.
''Hallucigenia sparsa'', now considered to be member of the taxon lobopodia, was originally described as being a member of this genus, until Simon Conway Morris recognized it as not being a polychaete.
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External links
★ Genus: ''Canadia spinosa'' - from the Smithsonian Institution.
References
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