新疆东准噶尔地区早泥盆世软舌螺的发现及其古生态和古地理意义  

Discovery of the Early Devonian hyoliths in East Junggar,Xinjiang and their palaeoecological and palaeogeographic significances

作　　者：黄烈斌 刘一龙 纵瑞文 高丹霞 申岑[1] HUANG Liebin;LIU Yilong;ZONG Ruiwen;GAO Danxia;SHEN Cen(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650031,China;School of Earth Sciences,China University of Geosciences(Wuhan),Wuhan 430074,China;State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences(Wuhan),Wuhan 430074,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650031 [2]中国地质大学(武汉)地球科学学院,湖北武汉430074 [3]中国地质大学(武汉)生物地质与环境地质国家重点实验室,湖北武汉430074

出　　处：《古地理学报》2024年第2期387-400,共14页Journal of Palaeogeography：Chinese Edition

基　　金：云南省高层次人才培养支持计划“青年拔尖人才”专项;昆明理工大学分析测试基金(编号:2022M20212101024)联合资助。

摘　　要：本文首次系统报道了来自中国新疆东准噶尔地区早泥盆世地层中的软舌螺化石,共计3属3种,分别为:王氏富蕴螺Fuyunotheca wangi gen.et sp.no v.,施氏纵肋螺Costulatotheca schleigeri Earp,2019和奥氏螺未定种Ottomarites sp.。其中,王氏富蕴螺作为首次发现的新属种,典型特征为横切面呈扁椭圆形至亚三角形,背部膨胀,具有1条贯穿壳体的背中脊,腹部较平至微微凸起,壳体前1/3处具有横向成组的肋,整个壳体装饰着横向比纵向明显的细线。古生态学分析表明,王氏富蕴螺是一类生活在具有一定水动力的、富氧的正常浅海环境中的软舌螺。另外,笔者总结了包括新属种在内的目前所有报道过的整个泥盆纪产出的软舌螺的有效属种(不包括未定种和未定属),共计来自11个国家12个地区的14属66种,依据其古地理分布特征,认为泥盆纪的软舌螺主要分布在南半球的劳俄大陆和冈瓦纳大陆附近,其他地区仅零星出现。此次新疆东准噶尔地区软舌螺化石的发现,不仅扩大了早泥盆世软舌螺类的古地理分布范围,同时为洲际间的地层对比提供了更多依据。The newly discovered hyoliths yielded from the Lower Devonian of East Junggar of Xinjiang,China,are documented herein for the first time,including three genera and three species:Fuyunotheca wangi gen.et sp.nov.,Costulatotheca schleigeri Earp,2019,and Ottomarites sp.As a new genus and species,F.wangi gen.et sp.nov,is mainly distinguished by typically oblate oval to subtriangular cross-section,swollen dorsal side with a pronounced median ridge,ventral side weakly convex.Surface sculpture prominent transverse striations and weakly longitudinal streaks on both dorsum and venter,and several sets of remarkable ribs parallel to the aperture in the anterior third of the conch.Palaeoecological analysis shows that F.wangi gen.et sp.nov.is a kind of orthothecid、,which could live in a normal,oxygenated shallow-marine environment with certain degree of hydrodynamics.Furthermore,based on the Devonian hyoliths reported so far from all over the world,it has been recognized 14 genera and 66 species as valid from 12 areas in 11 countries(excluding indeterminate genera and species).Palaeogeographic distribution analysis shows that the Devonian hyoliths were mainly distributed in the southern hemisphere,that were positioned near the Laurussia and Gondwana,with a few species sporadically distributed in other plates or blocks.Newly discovered specimens of these early Devonian hyoliths not only expands the palaeogeographic distribution range of hyoliths during the Devonian period,but also provides new evidence for inter-continental biostratigraphic correlation.

关 键 词：软舌螺 早泥盆世 古生态 古地理 东准噶尔 

分 类 号：Q911.5[天文地球—古生物学与地层学]