<==o †Czekanowskiales `--o †Czekanowskiaceae [] |-- †Leptostrobus |-- †Sphenarion Harris & Miller, 1974 `--o †Phoenicopsis `--o †(Culgoweria) |-- †P. (C.) jus'huaensis `-- †P. (C.) huolinheiana
Reference(s):
- Ge, S., Lydon, S. J. & Watson, J., 2003: Sphenobaiera ikorfatensis (Seward) Florin from the Lower Cretaceous of Huolinhe, eastern Inner Mongolia, China.
–Palaeontology: Vol. 46, #2, pp. 423-430 - Lydon, S. J., Watson, J. & Harrison, N. A., 2003: The lectotype of Sphenobaiera ikorfatensis (Seward) Florin, a ginkgophyte from the Lower Cretaceous of western Greenland.
–Palaeontology: Vol. 46, #2, pp. 413-421