Abstract: The petrified Paleozoic seed Callospermarion is discussed. A new species, C sinicum and C. sp. are discribed from several seed specimens collected from the Upper Caboniferous deposits in the Shanxi province. The characteristic of C. sinicum sp. nov. is between C. undulatu and C. pusillum. For example, the symmetry of C. sinicum sp. nov. is more distinctly bilateral than that of C. undulatum, but not as prominent as C. pusillum with promint lateral ridges. The characteristic of C. sp. is similar to C. undulatum, but is not the same. Relationship with other Paleozoic seed ferns is also discussed.

Key words: Callospermarion, Pteridosperm, Ovule, The Upper Caboniferous, Coal balls,