On the identity of the freshwater dinoflagellateGlenodinium edax, with a discussion on the generaTyrannodiniumandKatodinium, and the description ofOpisthoaulaxgen. nov.

• DOI: 10.2216/11-21.1
• Publication Date: 2011-11-03T15:04:08Z
• Authors: António José Calado
• Keywords: Dinoflagellate; Eyespot; Correct name

Calado A.J. 2011. On the identity of freshwater dinoflagellate Glenodinium edax, with a discussion on genera Tyrannodinium and Katodinium, description Opisthoaulax gen. nov. Phycologia 50: 641–649. DOI: 10.2216/11-21.1Within context preparation flora for identification dinoflagellates, edax affinities group phagotrophic species conspicuous eyespot not associated plastids (eyespot type C) currently classified in Katodinium were re-evaluated. The original illustrations G. suggest affinity Pfiesteriaceae. Whereas tabulation is based probable misidentification, similarity to berolinense suggests that two names can be regarded as synonyms T. comb. proposed. As presented modern floras, artificially defined basis position cingulum at or below posterior third cell, includes widely different forms. presence an C vorticella related combines general cell morphology reminiscent Esoptrodinium gemma formation Tovellia-like cysts mark this belonging Tovelliaceae. K. nieuportense, morphologically quite from these does display tovelliacean characters. None known Tovelliaceae matches characters its close relatives. described new combinations are proposed six other species.