` ::Yes, you really can't use Encarta or another general encyclopedia for information of this nature.  Daniel has carefully qualified AlgaeBase to precisely what it is, ``at present the best database for species names of algae.``  In addition, it's easy to use, it's readily searchable on the web by anyone, and it lists its references, so if you want to double check its data you can, or if it cites an authority who is somewhat controversial, you know itit is one of the best done organism databases on the web because of these reasons.  However, if you don't want to use AlgaeBase you may use a recent textbook on algae, instead.  Either way, simply quote whatever source you use, as this is something in serious flux and disagreement among phycologists.  Cheers.   `