作 者 ：Zhu Jia-nan, Zhang Xiu-sheng, Ma Jie
期 刊 ：植物分类学报 1994年 4期
Keywords:Shanxi,
Abstract:
This paper describes a new microstrobilus of palaeozoic Cycadaceae collected from
the upper part of Lower Shihezi Formation, Dongshan Mine, Taiyuan, Shanxi, China and
named it as Cycadostrobilus paleozoicus Zhu, gen. et sp. nov. This new cycad is the oldest
microstrobilus to our knowlege of cycads. In the same locality and layer, there are Primocy-
cas chinensis Zhu et Du, Sphenophyllum emarginatum Brongn. , S. costae Sterz. , S. vertical-
latum (Schloth.) Brongn. , S. oblongifolium (Germ. et Kaulf. ) Ung. , Tingia carbonica
(Schenk.) Halle, T. hamaguchii Kon’no, Macrostachys huttoniformis Halle, Sphenopteris
norinii Halle, S. firmata Sze, S. gothanii Halle, Sphenopteridium pseudogermanicum
(Halle) Gu et Zhi, Pecopteris feminaeformis (Schloth.) Sterz. , P. wongii Halle, P. tuber-
culata Halle, P. unita Brongn. , P. taiyuanensis Halle, Emplectopteris triangularis Halle,
Taeniopteris norinii Halle, T. spp. , Cordaites principalis (Germ.) Gein. , Cornucarpus patu-
lus Halle, Radicites spp. and a few taxa unknown to palaeobotanical data. The authors con-
sider that Cycadostrobilus paleozoicus is the same species as Primocycas chinensis, and its veg.
etative leaves are similar to those of the genus Taeniopteris, e.g.T. norinii Halle.