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Steidinger, K.A.; Williams, J. (1970). Dinoflagellates. Memoirs Hourglass cruis. 2: 1-251
In: Memoirs of the Hourglass Cruises. Florida Marine Research Institute. Florida Department of Environmental Protection: St. Petersburg. ISSN 0085-0683, more
Peer reviewed article  

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  • Steidinger, K.A.
  • Williams, J.

    During the Hourglass Cruises (a systematic sampling program in the eastern Gulf of Mexico), 232 dinoflagellate taxa were recorded from 504 live and 41 tow samples. These collections were taken over a 28 month period from six stations located on transects between St. Petersburg and Ft. Myers, Florida. The majority of species were photosynthetic, armored and of oceanic/neritic origin and were present throughout the year. Species diversity increased in a seaward direction, accompanied by a decrease in cell densities. Trends of seasonal and horizontal distribution are presented, and observed salinities, temperatures and counts are provided for individual taxa. Recent advances in dinoflagellate studies and primary production are reviewed briefly to indicate their status. A description of free-living dinoflagellates is supplemented by a glossary, generic descriptions, generic and specific keys, and 45 photographic plates. The descriptioh of free-living dinoflagellates is amended to include the pseudocolonial characters of Polykrikos. Possible emendations for Gymnodinium and Gyrodinium are outlined because of problems arising in the separation of these genera by the extent of cingulum displacement. Homonymy in Peridinium is briefly discussed.

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