Chloe Kim #1 of the United States competes in the FIS World Cup 2018 Ladies Snowboard Halfpipe final during the Toyota U.S. Grand Prix on December 9, 2017 in Copper Mountain, Colorado. Matthew StockmanâGetty Images.
The phylum name Platyhelminthes literally means flatworms.. Members of this phylum are soft, thin-bodied, leaf or ribbonlike worms, including the familiar planaria of ponds and streams, as well as the flukes and tapeworms parasitic in human and other animal bodies.
This was before the nature of the animals was clearly understood, and both phyla, as then defined, included, in addition to the ectoprocts, organisms not closely related to them. Hence, some workers prefer to use the phylum-name Ectoprocta for the phylum-concept in the narrower sense.Other scholars, however, continue to use the term Polyzoa or Bryozoa in a restricted sense for the phylum that includes the animals that almost everyone calls bryozoans.he creatures now assigned to phylum Ectoprocta originally were referred to phylum Polyzoa by J. V. Thompson in 1830 and to phylum Bryozoa by C. G. Ehrenberg a few months later, in 1831.