Definitions for Atelocerata

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  1. Atelocerata

    Atelocerata is a proposed clade of arthropods that includes Hexapoda and Myriapoda, but excludes Crustacea and Chelicerata. Some authors use the name interchangeably with Uniramia and Tracheata. It was first proposed by Richard Heymons in 1901 It is an extensive division of arthropods comprising all those which breathe by tracheae, as distinguished from Crustacea, which breathe by means of gills. The status of Atelocerata as a true clade is now doubted. Some recent authors have viewed the crustaceans as more closely related to hexapods than myriapods are. If this is true, then characters shared by hexapods and myriapods, but not crustaceans, must be the result of either convergence, or secondary loss in the Crustacea.

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