Abstract
DURING investigations of algae and aplanospores in Holocene peat deposits of south-western Australia1, fossil dinoflagellates and hystrichospheres have been found; these are the first representatives of these groups to be discovered in non-marine deposits. The dinoflagellates are referable to the genera Gymnodinium (Fig. 1b), ? Peridinium (Fig. 1a), Palaeohystrichophora and to an undescribed genus of the family Peridiniaceae; they are found in assemblages from two localities near Lake Muir, about 40 miles north of Walpole, Western Australia, and from Myalup Swamp, 24 miles north-north-east of Bunbury, Western Australia. The hystrichospheres are referable to six undescribed species of the genus Baltisphaeridium (Figs. 1c and 1d): they are present in assemblages from the above localities and from deposits at Boggy Lake, 6 miles south-west of Walpole, Western Australia. In no case do these species afford evidence of dinofiagellate affinities.
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CHURCHILL, D., SARJEANT, W. Fossil Dinoflagellates and Hystrichospheres in Australian Freshwater Deposits. Nature 194, 1094 (1962). https://doi.org/10.1038/1941094a0
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DOI: https://doi.org/10.1038/1941094a0
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