URMO name details
original description
(of ) Ritter, W. E. (1901). The ascidians. In: Papers from Harriman Alaska expedition. <em>Proc. Washington Acad. Sci.</em> 3: 225-266. [details]
basis of record
van der Land, J. (ed). (2008). UNESCO-IOC Register of Marine Organisms (URMO). , available online at http://www.marinespecies.org/urmo/ [details]
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