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首页> 外文会议>International Symposium on the Ordovician System;International Symposium on the Silurian System;IGCP 503 Annual Meeting >PALAEOBIOGEOGRAPHIC DISTRIBUTION OF PSEUDISOGRAPTUS AND EARLY BISERIALS IN SOUTH CHINA AND ITS IMPLICATION FOR THE ORIGINATION OF MAJOR GRAPTOLITE FAUNAS IN THE ORDOVICIAN
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PALAEOBIOGEOGRAPHIC DISTRIBUTION OF PSEUDISOGRAPTUS AND EARLY BISERIALS IN SOUTH CHINA AND ITS IMPLICATION FOR THE ORIGINATION OF MAJOR GRAPTOLITE FAUNAS IN THE ORDOVICIAN

机译：华南伪古猿和早双生古生物地理分布及其对奥陶纪主要石墨石类植物来源的启示

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摘要

The most significant events in graptolite evolution happened in the Ordovician, as manifested by the appearances of three major faunas including the anisograptids, dichograptids and diplograptids (Buiman,1970). The anisograptids, typified by their planktonic life style which was probably derived from their benthic ancestors and retention of three types of thecae, first appeared at the very beginning of the Ordovician. The dichograptids were characterized by the loss ofbithecae and stolothecae, and started their expansion in the latest Tremadocian.
机译：笔石演化中最重要的事件发生在奥陶纪，这主要表现在三个主要动物群的出现，包括非异翅类，双足类和双翅类（Buiman，1970）。异头类动物以浮游生物为代表，这可能源于其底栖祖先和三种类型的卵母细胞的保留，它们首先出现在奥陶纪的最开始。双足类动物的特征是失去了生物类和生物类，并开始在最新的特雷莫多克虫中进行扩展。

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