进化序列系统学——以二叠纪瓦岗珊瑚类为例

徐桂荣; 龚淑云; 王永标

Volume 25 Issue 1

Jan. 2000

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XU Gui-rong, GONG Shu-yun, WANG Yong-biao, 2000. EVOLUTIONARY SEQUENCE SYSTEMATICS: CASE ANALYSIS OF PERMIAN WAAGENOPHYLLOID CORALS. Earth Science, 25(1): 1-10.

Citation:

XU Gui-rong, GONG Shu-yun, WANG Yong-biao, 2000. EVOLUTIONARY SEQUENCE SYSTEMATICS: CASE ANALYSIS OF PERMIAN WAAGENOPHYLLOID CORALS. Earth Science, 25(1): 1-10.

XU Gui-rong, GONG Shu-yun, WANG Yong-biao, 2000. EVOLUTIONARY SEQUENCE SYSTEMATICS: CASE ANALYSIS OF PERMIAN WAAGENOPHYLLOID CORALS. Earth Science, 25(1): 1-10.

Citation:

XU Gui-rong, GONG Shu-yun, WANG Yong-biao, 2000. EVOLUTIONARY SEQUENCE SYSTEMATICS: CASE ANALYSIS OF PERMIAN WAAGENOPHYLLOID CORALS. Earth Science, 25(1): 1-10.

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EVOLUTIONARY SEQUENCE SYSTEMATICS: CASE ANALYSIS OF PERMIAN WAAGENOPHYLLOID CORALS

Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China

Received Date: 1999-06-25
Publish Date: 2000-01-25

Abstract

Abstract

Evolutionary sequence systematics, an academic discipline in paleontology and biology, is oriented toward the research into the systematic growth association between species or taxa, including the relative relations between species or taxa, and also toward the determination of sequence of their formation. The systematics is based on the phenetic-cladistic systematics. Many important theoretical concepts in the cladistics include the time concept in this systematics. For example, the time-span between two closest sister species can not exceed the life span of their mother species. The analysis of sister-group and character mosaic distribution may serve as a major method for the research into the evolutionary sequence. However, the understanding of the character mosaic distribution is the key to this research. These analyses can be executed with the computer programs. The Permian Waagenophylloid coral fauna is taken as an example to illustrate the analysis of evolutionary sequence. These coral fossils are widespread in the Tethyan region. Seventeen characters and several changing states for each character were determined through the analysis of character features of Waagenophylloid corals. The plesiomorph character states for each character were identified in line with the principles of the widest distribution of character states, fossil records and ontogenesis. In addition, these characters are classified as 4 ranks on the basis of their important places in phylogeny. Then the relationship between sister groups and evolutionary sequence between species were determined following the theory and methodology of the evolutionary sequence systematics. In the mutual proof-tests between the sister groups and evolutionary sequence, some important palaeontological phenomena were discovered such as character degeneration, parallel evolution, and poly-directional clades. At the same time, a number of abnormal orders were identified. From the first events that occurred in the biostratigraphical test, possible stratigraphic horizons of some fossils can be deduced.
- evolutionary sequence systematics,
- character mosaic distribution,
- Permian,
- Waagenophylloid corals

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References(18)

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