云南中三叠世罗平生物群首次发现硅质海绵骨针化石  

First discovery of the siliceous sponge spicules from the Middle Triassic Luoping Biota,Yunnan Province

作　　者：黄金元[1] 胡世学[1] 张启跃[1] 周长勇[1] 文芠[1] 马志鑫[1] HUANG Jinyuan;HU Shixue;ZHANG Qiyue;ZHOU Changyong;WEN Wen;MA Zhixin(Chengdu Center,China Geological Survey,Chengdu 610081,Sichuan,China)

机构地区：[1]中国地质调查局成都地质调查中心,四川成都610081

出　　处：《地质通报》2022年第12期2167-2172,共6页Geological Bulletin of China

基　　金：国家自然科学基金项目《云南三叠纪罗平生物群埋藏学及群落生态学研究》(批准号:41772022);《应用同步加速器X射线层析显微技术重建云南罗平中三叠世牙形石多分子器官》(批准号:41502013);中国地质调查局项目《扬子陆块攀枝花-玉溪地区与罗平生物群区域地质调查》(编号:DD20190054);《南盘江北缘三叠纪古生物群专项地质调查》(编号:DD20221635-004)。

摘　　要：在云南罗平生物群中新发现的硅质海绵骨针化石,包括单轴骨针和四轴骨针两大类,其中四轴骨针包含后三叉骨针、前三叉骨针和棘状骨针3种类型。海绵骨针形态保存完整,并发育微细的轴管构造。扫描电镜能谱(EDS)分析表明,骨针的构成成分为Si和O元素。骨针的形态类型和组成元素表明,它们属于普通海绵纲。海绵骨针在罗平生物群化石库中的发现,显示海绵动物也曾是该生物群中的一员,丰富了此生物群门类的多样性。Two types of siliceous sponge spicules have been discovered from Luoping Biota from Yunnan Province,southwest China,including the monaxons and tetractines which contains anatriaene,protriaene and calthrops three forms.The spicules are well-preserved with the micro-structure of axial canal.The spicules are composed of the elements of silicon and oxygen by testing with Energy Dispersive Spectrometer(EDS).The element compositions and the types of the spicules indicate that they belong to the Demospongea.These fossil spicules are the first reported in Luoping Biota,they indicate that the sponges used to live together with other fossils in Luoping Biota,and increasing the diversity of this biota.

关 键 词：中三叠世 海绵骨针 罗平生物群 云南 

分 类 号：P534.51[天文地球—古生物学与地层学] Q91[天文地球—地质学]