四川广元晚志留世植物碎片(英文)

THE PLANT-DERIVED FRAGMENTS OF THE LATE SILURIAN FROM GUANGYUAN, SICHUAN, SOUTH CHINA

本文初步研究了产自四川广元晚志留世地层中植物碎片 ,共分为三个类型。 Type 具有叶状体 ,表面具有孔 ,叶状体上着生有具有中间加厚带的枝。 Type 的枝表面具有刺。 Type 的枝二歧分叉三次。通过研究认为 ,Type 与苔藓类植物可以对比 ,具有一定的相似性 ,可能生活在比较干燥的环境中。 Type 的母体植物可能生活在具有食草动物的环境中。

A palynological study of Upper Silurian deposits from Guangyuan, Sichuan, P.R. China, revealed not only cryptospores, miospores, tubular structures and cuticle-like sheets but also numerous plant-derived fragments. Three types of plant-derived fragment are described in this paper. Type Ⅰ consists of thallus with pores,and branches with center band. Type Ⅱ is characterized by the branch with spines on the surface. Type Ⅲ is composed of the branch with three times dichotomies. Type I might resemble the bryophyte in some morphology, and may grow in a desiccating environment. It is suggested that the parent plant of Type Ⅱ may live in an environment with herbivory.