浙江长兴晚泥盆世几种羽状复叶植物的发现及其意义  

SEVERAL FOSSILS WITH PINNATE COMPOUND LEAVES FROM THE UPPER DEVONIAN OF CHANGXING,ZHEJIANG PROVINCE,AND THE SIGNIFICANCES

作　　者：秦敏[1] 王德明[1] 薛进庄[1] 刘乐[1] 黄璞[1] 

机构地区：[1]北京大学地球与空间科学学院,造山带与地壳演化教育部重点实验室,北京100871

出　　处：《古生物学报》2016年第4期424-432,共9页Acta Palaeontologica Sinica

基　　金：国家重点基础研究发展计划(2012CB821900);国家自然科学基金项目(41172007)资助

摘　　要：晚泥盆世是植物叶片形态复杂化进程中的一个重要时期,前裸子、种子、似真蕨和楔叶这四类植物都独立演化出了片化的大型叶。本文研究浙江长兴上泥盆统(法门阶)五通组的几种羽状复叶植物(3属4种),包括Sphenopteris(楔羊齿),Rhodea(须羊齿)和Triphyllopteris(三裂羊齿)。它们大多具二次羽状复叶,小羽片具有不同程度、数目和形状的裂片。这里明确Rhodea的晚泥盆世起源,并给出Triphyllopteris的最早化石记录。这些植物的分类尚不清楚,但为大型叶尤其是复叶的早期演化提供了新证据。During the Late Devonian, an important period of the leaf morphology evolution, four lineages of euphyllophytes （i. e. progymnosperms, seed plants, fern-like plant and sphenopsids） have independently evolved laminate megaphylls. Four species of pinnate compound leaves, belonging to three genera including Sphenopteris, Triphy- llopteris and Rhodea, are described from theUpper Devonian （Famennian） Wutong Formation of Changxing County, Zhejiang Province, China. Most of them possess bipinnately compound leaves, with pinnules lobed in different extents, numbers and shapes. The Devonian origin of Rhodea and the earliest fossil record of Triphyllopteris are demonstrated. These plants provide new evidence for the early evolution of megaphylls, especially for the compound leaves, although their classification are still not clear.

关 键 词：Sphenopteris TRI PK yllopteris Rkodea 叶子 五通组 晚泥盆世 

分 类 号：Q914[天文地球—古生物学与地层学]