Ptilozamites Nathorst 1878 is one of the most widespread genera of Mesozoic seed ferns, reaching its highest diversity during the Late Triassic. As a palaeogeographic and biostratigraphic marker restricted to the Late Triassic of the Southern Floristic Province in China, Ptilozamites chinensis Hsu 1950 had once been transferred to the genus Pseudoctenis Seward 1911. A detailed morphological and anatomical study of the well-preserved material col-lected from Upper Triassic sediments of South China, as well as the re-investigation of representative historical specimens demonstrate it belongs to the genus Ptilozamites. A neotype and an emended diagnosis for Ptilozamites chinensis are proposed. A comparison with the previously documented specimens of Ptilozamites chinensis sug-gests a different overall morphology during the developmental process of the plant. The paleogeographic distri-bution of Ptilozamites chinensis indicates a preference for hot and humid habitats during the Late Triassic of the Southern Floristic Province. (c) 2022 Elsevier B.V. All rights reserved.