Talk:Trilobita

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:::It might be possible to use "Trilobitomorpha" for the larger trilobite clade - i. e. anything more closely related to trilobites than any living arthropods (I believe I have seen this done in recent publications, but unfortunately I can't recall the references). Seeing as ''Naraoia'' and cronies are probably the closest known relatives of "true" trilobites, it's largely a matter of personal taste whether to include them in Trilobita or not--[[User:Christopher|Christopher Taylor]] 09:58, 25 February 2007 (Perth)
:::It might be possible to use "Trilobitomorpha" for the larger trilobite clade - i. e. anything more closely related to trilobites than any living arthropods (I believe I have seen this done in recent publications, but unfortunately I can't recall the references). Seeing as ''Naraoia'' and cronies are probably the closest known relatives of "true" trilobites, it's largely a matter of personal taste whether to include them in Trilobita or not--[[User:Christopher|Christopher Taylor]] 09:58, 25 February 2007 (Perth)
:::: In one senseit's like "how many angels can dance on the head of a pin". On the other hand, including Naraoia to the exclusion of many other lower cambrian arthropods (> 150 from Chengjiang alone) just means a line has been moved a bit. BTW, Fortey seems to prefer Arachnomorpha, though I don't remember why. [[User:RogerPerkins|RogerPerkins]] 15:10, 25 February 2007 (PST)
:::: In one senseit's like "how many angels can dance on the head of a pin". On the other hand, including Naraoia to the exclusion of many other lower cambrian arthropods (> 150 from Chengjiang alone) just means a line has been moved a bit. BTW, Fortey seems to prefer Arachnomorpha, though I don't remember why. [[User:RogerPerkins|RogerPerkins]] 15:10, 25 February 2007 (PST)
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:::::Arachnomorpha is a larger clade, containing chelicerates and all taxa closer to them than other living arthropods. The phylogeny of the Cambrian arthropods tends to shift a fair bit, so Fortey may be avoiding anything too fine-tuned.--[[User:Christopher|Christopher Taylor]] 09:34, 26 February 2007 (Perth)

Revision as of 00:37, 26 February 2007

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