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About: Aglaspidida     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatPrehistoricArthropods, within Data Space : dbpedia.org associated with source document(s)

Type: yago:WikicatArthropodsanimalyago:Animal100015388yago:Arthropod101767661yago:Invertebrate101905661yago:LivingThing100004258yago:Object100002684yago:Organism100004475yago:PhysicalEntity100001930yago:Whole100003553yago:WikicatPrehistoricArthropods New Facet based on Instances of this Class

Aglaspidida is an extinct order of aquatic arthropods that were once regarded as primitive chelicerates. However, anatomical comparisons demonstrate that the aglaspidids cannot be accommodated within the chelicerates, and that they lie instead within the Artiopoda, thus placing them closer to the trilobites. Aglaspidida contains the subgroups Aglaspididae and Tremaglaspididae, which are distinguished by the presence of acute/spinose genal angles and a long spiniform tailspine in the Aglaspididae.