THESSEN, Anne E., David J. PATTERSON, & Shauna A. MURRAY 2012 (Aug. 30) The taxonomic significance of species that have only been observed once: the genus Gymnodinium (Dinoflagellata) as an example PLOS One 7{8}: 1-34, 7 figs., 2 tables incl. 6 new names for supposed later homonyms