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Anatomical features which confirm the early Tertiary occurrence of Phyllocladus in Australia have been described. Phyllocladus morwellensis Deane has been more clearly defined; the sporomorph Phyllocladus palaeogenicus has been described and its distribution recorded. A new sporomorph, Trisaccites micropterus, has been established for certain 3-winged fossil pollen grains isolated from Mesozoic and Tertiary deposits. The distribution of the sporomorph Micocachryidites antarcticus Cookson in Australian deposits has been traced.
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Cookson et al. (1954) studied this question.