标题:
关于乔木状石松植物茎压印化石主要分类性状的评述
Notes on the Key Taxonomic Characters of Arborescent Lycopsid Stem Adpressions
作者:
王祺, 徐洪河, 申思
关键字:
乔木状石松植物, 茎压印化石, 分类性状, 泥盆纪
Arborescent Lycopsids; Stem Adpressions; Taxonomic Characters; Devonian
期刊名称:
《Botanical Research》, Vol.2 No.3, 2013-07-11
摘要:
乔木状石松植物在晚古生代植物群中一直引人注目，是最早在中泥盆世(约393~383百万年前)就进化出两极生长、乔木和异孢习性的维管植物类群之一。本文评述了乔木状石松植物茎压印化石一些主要的分类性状以及相关术语，包括叶座、叶痕、通气道痕、叶舌和叶序。建议这些分类性状在使用中应该规范，并强调了它们的生物学和埋藏学意义。The Late Palaeozoic arborescent lycopsids are one of the conspicuous vascular plant groups, which have developed the bipolar growth, tree and heterosporous habits since the Middle Devonian (ca. 393 - 383 million years ago). In this paper, the key taxonomic characters and relevant terminology on stem adpressions of arborescent lycopsids are reviewed. These characters include leaf cushion, leaf scar, parichnos scar, ligule, and phyllotaxy. We suggest that the taxonomic characters should be defined properly, with considerations to their biological and taphonomic implications in practice.