A New Genus and Species—Cycadostrobilus paleozoicus Zhu of Cycadaceae from the Permian of China

Zhu Jia-nan, Zhang Xiu-sheng, Ma Jie

Received:1900-01-01 Revised:1900-01-01 Online:1994-07-18 Published:1994-07-18
Contact: Zhu Jia-nan

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.

Key words: Shanxi, Lower Shihezi Formation, Cycadostrobilus paleozoicus, Primocycas chinensis, Taeniopteris norinii

Zhu Jia-nan, Zhang Xiu-sheng, Ma Jie. A New Genus and Species—Cycadostrobilus paleozoicus Zhu of Cycadaceae from the Permian of China[J]. .

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