Gregicaulis dubius Pleuromeia dubia is a tall species for the genus, with distinctive elongate leaf scars, and known from the Early Triassic of Australia and South Africa.

Like other species of Pleuromeia it was a survivor of the marked greenhouse spike at the end of the Early Triassic.

[1] It was originally assigned to the genus Gregicaulis, and its placement in the genus Pleuromeia has been questioned, due to its significant differences to the core Eurasian members of the genus.

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