摘要
海金沙科的Ruffordia goepperti(Dunker)Seward是世界上早白垩世极为重要的蕨类植物。通过对比发现,Ruffordia goepperti原位孢子的形态和细微纹饰与地层中分散孢子Cica-tricosisporites australiensis(Cookson)Potonie和C.minor(Bolch.)Pocock一致,而且大化石与分散孢子的地史、地理分布范围也相同,因而认为R.goepperti是C.australiensis和C.minor的母体植物,后者为幼体孢子。本文还讨论了这一发现的意义及Cicatricosisporites dorogensis的鉴定问题。
Comparison of the in situ spores of the Early Cretaceous Schizaeaceous fern Ruffordia goep-perti (Dunk. ) Seward with the dispersed spores from the Lower Cretaceous indicates that the spores of R. goepperti are identical to Cicatricosisparties australiensis (Cookson) Potonie and C. minor (Bolch. ) Pocock both in the outlines and ornamentation. Besides, the megafossils and the dispersed spores have the similar stratigraphic and geographic distributions. Therefore, Ruffordia goepperti is the parent plant of Cicatricosisporites australiensis and C. minor and the latter one represents the unripe spores. The stratigraphic and paleoecologic significance of this relationship is discussed.
出处
《地质论评》
CAS
CSCD
北大核心
1998年第3期243-248,T001,共7页
Geological Review
基金
国家自然科学基金(编号49202017)的研究成果