The Lycopods - a Symposium at the 40th Annual AIBS Meeting in Toronto, Canada, 6-10 August, 1989

乔治梅森大学的朱迪斯·斯科格博士， 史密森尼学会的同事威廉·迪米歇尔博士组织了一天- 植物学家和古生物学家的长期研讨会， 最古老的血统的形态和遗传信息 有维管的陆生植物石松类。 现代的松苔和 鹅掌楸是这一群体中幸存的物种之一， 在其漫长的化石历史中， 石炭纪和其他形成大煤层的地层 北美的一部分。 古生物学家将分析 多样性和灭绝的特征 在其4亿年的历史中，植物学家将 描述形态和遗传变异存在于 世界上现存的物种，并评估目前的原因 群体的进化状态。 来自美国的研究人员， 丹麦和英国将在研讨会上发表论文， 代表了目前对这些原始的研究的全部范围， 陆地植物

Dr. Judith Skog of George Mason University, working with her Smithsonian colleague Dr. William DiMichele, has organized a day- long symposium of botanists and paleontologists to synthesize morphological and genetic information on the most ancient lineage of vascular land plants, the lycopods. Modern-day pine moss and quillworts are among the surviving species of this group, which in its long fossil history included large trees of the Carboniferous and other forms contributing to the great coal beds of North America. Paleontologists will analyze the patterns of diversification and of extinction that characterize the group throughout its 400 million year history, and botanists will describe the morphological and genetic variability present in the world's living species and assess reasons for the current evolutionary status of the group. Researchers from the U.S., Denmark, and Britain will present papers at the symposium, thus representing the full range of current study on these primitive land plants.