Amiskwia

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(Anatomy)
 
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==Kingdom [[Animalia]]==
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==Fossil Range = [[Middle Cambrian]]==
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*Kingdom [[Animalia]]
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*Subkingdom = [[Eumetazoa]]
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*Infrakingdom = [[Bilateria]]
*Phylum = ''[[Incertae sedis]]''
*Phylum = ''[[Incertae sedis]]''
*Genus = '''''Amiskwia'''''  
*Genus = '''''Amiskwia'''''  
*Species = '''''A. sagittiformis'''''  
*Species = '''''A. sagittiformis'''''  
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''Amiskwia'' was an [[Chaetognatha|arrowworm]]-like [[invertebrate]] from the [[Cambrian]] period.  Its fossils have been found in the [[Burgess Shales]] and [[Maotianshan shales]].  It was first described by Charles Walcott in 1911.
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''Amiskwia'' was an [[worm]]-like [[invertebrate]] from the [[Cambrian]] period.  Its fossils have been found in the [[Burgess Shale]] and [[Maotianshan Shale]].  It was first described by [[Charles Walcott]] in 1911. Only a handful of specimens have been found since then, suggesting that it was rare.  Furthermore, It was first assigned to [[Chaetognatha]] (arrow worms) but was later suggested to be a possible [[Nemertea]]n.  Like many other fossils from this specific time period, its affinities are unknown.  ''Amiskwia'' is the name of a river near Mt. Burgess and ''sagittiformis'' means, "arrow shaped". 
==Anatomy==
==Anatomy==
*One inch long, and sausage-shaped, bilaterally symmetrical.
*One inch long, and sausage-shaped, bilaterally symmetrical.
*Body divided into a head, trunk and tail.
*Body divided into a head, trunk and tail.
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*The head is equipped with two tentacles that arise from the ventral side of the head, the trunk is unsegmented and possesses two side fins and the tail possesses a horizontally positioned caudal fin, shaped like those of arrowworms.
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*The head is equipped with two tentacles that arise from the ventral side of the head, the trunk is unsegmented and possesses two side fins and the tail possesses a horizontally positioned caudal fin.
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==Sources and Further reading==
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http://paleobiology.si.edu/burgess/amiskwia.html

Latest revision as of 22:08, 20 August 2009

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