黔北桐梓下奥陶统红花园组的苔藓动物化石新材料
NEW BRYOZOANS FROM THE EARLY ORDOVICIAN HONGHUAYUAN FORMATION IN TONGZI COUNTY,NORTHERN GUIZHOU
何敏 1杨宇宁 1马俊业 2张志亮 2池祥日 2刘静 1彭庭祖 1张倩倩 1阳磊1
作者信息
- 1. 贵州大学资源与环境工程学院,喀斯特地质资源与环境教育部重点实验室,贵阳 550025
- 2. 现代古生物学和地层学国家重点实验室,中国科学院南京地质古生物研究所,南京 210008
- 折叠
摘要
黔北桐梓地区下奥陶统红花园组(弗洛阶)的点礁中有多样性较高的苔藓动物化石.系统古生物学分析显示,这些苔藓虫群体属于变口目和爱沙尼亚口目,共有2属4种:Orbiramus ovalis,O.minus,O.normalis和Nekhorosheviella semispherica.新化石纪录扩大了早期苔藓虫类型Orbiramus和Nekhorosheviella的地理分布和地史延限.这些模块化生长的苔藓动物化石显示出典型的包壳生物造礁构造,在红花园组点礁中以苔藓虫格架岩(bryozoan framestone)和苔藓虫-微生物粘结岩(bryozoan-microbial blindstone)参与造礁.新化石材料为探讨扬子板块早期苔藓虫的多样性演化及其造礁机制提供了关键证据.
Abstract
Lower Ordovician bryozoan fossils from patch reefs of the Honghuayuan Formation(Floan Stage)at the Honghuayuan section in Tongzi County,northern Guizhou are elucidated herein.Four species in two genera,i.e.,Orbiramus ovalis,O.minus,O.normalis and Nekhorosheviella semispherica,belong to the Trepostomida and the Esthonioporida are recognized,which greatly expanded the geographical and stratigraphical distribution of these early iconic bryozoans.Moreover,these modular bryozoans demonstrate typical encrusted reef-building construction,implying their contribution in the development of Early Ordovician patch reefs as bryozoan-framestone and bryozoan-microbial blindstone from the Honghuayuan Formation.The fossil evidence from the Honghuayuan Formation shed new light on the evolutionary diversity,modular growth pattern and reef-building mechanism of the early bryozoans.
关键词
苔藓虫/多样性/造礁机制/红花园组/下奥陶统/贵州桐梓Key words
Bryozoa/diversity/reef-building mechanisms/Honghuayuan Formation/Lower Ordovician/Tongzi County of northern Guizhou引用本文复制引用
基金项目
国家自然科学基金(42162003)
贵州省人才基地项目(RCJD2018-21)
贵州省科技计划(黔科合平台人才2017-5788)
贵州省科技计划(2023-153)
中国科学院率先行动计划(202200020)
出版年
2024
NETL
NSTL
万方数据