Occurrence of Sciadopitys-like fossil wood Coniferales in the Jurassic of western Liaoning and its evolutionary implicationsReport as inadecuate




Occurrence of Sciadopitys-like fossil wood Coniferales in the Jurassic of western Liaoning and its evolutionary implications - Download this document for free, or read online. Document in PDF available to download.

Chinese Science Bulletin

, Volume 57, Issue 6, pp 569–572

First Online: 19 November 2011Received: 05 July 2011Accepted: 08 October 2011

Abstract

The genus Sciadopitys, containing a single species S. verticillata, is the only extant representative of the Family Sciadopityaceae Coniferales, and is a remarkable living fossil. Although some leafy fossils have been ascribed to Sciadopityaceae, fossil xylem material with a close affinity to this family is very rare, and there have been no fossils found showing both pith and primary xylem structures, which are of great importance for wood identification. Thus, it has been difficult to use fossils for the understanding of wood anatomy evolution in the sciadopityaceous plants over geological time. In this note we briefly report on Sciadopitys-like fossil wood found in the Middle Jurassic of western Liaoning, which bears well-preserved Protosciadopityoxylon-type secondary xylem, endarch primary xylem and heterogeneous pith. This is the first report of fossil specimens of the Sciadopityaceae with such detailed preservation of wood structures. The discovery provides precise anatomical evidence for reconstructing the evolutionary history and geographical distribution of Sciadopityaceae, as well as contributing to understanding of the fossil diversity of the Jurassic Yanliao Flora in northern China.

Keywordsconifer Sciadopityaceae anatomical structure Tiaojishan Formation Middle Jurassic western Liaoning This article is published with open access at Springerlink.com

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Author: ZiKun Jiang - YongDong Wang - ShaoLin Zheng - Wu Zhang - Ning Tian

Source: https://link.springer.com/article/10.1007/s11434-011-4850-z







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