Guiry, M.D. & Guiry, G.M. 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org (taxonomic information republished from AlgaeBase with permission of MD Guiry). Also available: World Register of Marine Species at: http://www.marinespecies.org
Diatoms of the United States, database (version 21/10/2014)
Spaulding, S.A., Lubinski, D.J. and Potapova, M. (2010). Diatoms of the United States. http://westerndiatoms.colorado.edu Accessed on 21 October 2014
Round, F. E., R. M. Crawford, and D. G. Mann
Journal/Book Name, Vol. No.:
The Diatoms: Biology and Morphology of the Genera
Cambridge University Press
On the webpage of 'Diatoms of the United States,' the genus Simonsenia Lange-Bertalot is put under family Nitzschiaceae
ITIS taxonomy is based on the latest scientific consensus available,
and is provided as a general reference source for interested parties.
However, it is not a legal authority for statutory or regulatory purposes.
While every effort has been made to provide the most reliable and up-to-date
information available, ultimate legal requirements with respect to species
are contained in provisions of treaties to which the United States is a
party, wildlife statutes, regulations, and any applicable notices that have
been published in the Federal Register. For further information on U.S.
legal requirements with respect to protected taxa, please contact the
U.S. Fish and Wildlife Service.