Trilobita sandbox

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==Trilobite Ancestors and Origins==
==Trilobite Ancestors and Origins==
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The currently most accepted theory is that the Trilobita is a Class within the Superclass Arachnomorpha, one of two Superclasses within the Subphylum Schizoramia of the Phylum Arthropoda, and as such are more closely related to Chelicerata, than to Myriapoda, Crustacea or Hexapoda, including insects (see chart above). Subphylum Schizomoria also contains Crustaceomorpha among whose members are primitive arthropods common to the Burgess shale and Chengjiang.
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The currently most accepted phylogeny has Trilobita as a Class within the Superclass Arachnomorpha, one of two Superclasses within the Subphylum Schizoramia of Phylum Arthropoda. By this phylogeny, trilobites are more closely related to the Chelicerates, than to Myriapods, Crustacea or Hexapods. Subphylum Schizomoria also contains Crustaceomorpha among whose members are primitive arthropods common to the Burgess shale and Chengjiang.
==References==
==References==

Revision as of 17:29, 4 March 2007

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