New generic names for Permian plants of Cathaysia

New generic names Szecalamitina nom. nov., Gigantogramme nom. nov., and Gigantocladus nom. nov. are proposed here for the Permian plants of Cathaysia to replace illegitimate names Siella Yang, 2006, Acanthocladus Yang, 2006, and Hallea Yang et Wu, 2006, which are later homonyms respectively of flowering plants Siella Pimenov, 1978 (Rubiaceae) and Acanthocladus Hasskarl, 1864 (Polygalaceae), Hallea Mathews, 1948, used for fossil seeds. New combinations are made to transfer all described species of these Chinese fossil plants into new genera, Szecalamitina, Gigantogramme, and Gigantocladus.