黔东乌溜阶凯里组Dictyonina Cooper,1942的初步研究  

Preliminary study on Dictyonina Cooper,1942,from Kaili Formation(Cambrian Wuliuan)in Eastern Guizhou

作　　者：毛永琴 罗书文 高占冬 王德远 吴克华 MAO Yongqin;LUO Shuwen;GAO Zhandong;WANG Deyuan;WU Kehua(Guizhou Institute of Mountain Resources,Guiyang 550001,China;Guizhou Karst Cave(Tourism)Resources Development and Utilization Engineering Technology Research Center,Guiyang 550001,China)

机构地区：[1]贵州省山地资源研究所,贵州贵阳550001 [2]贵州省喀斯特洞穴(旅游)资源开发利用工程技术研究中心,贵州贵阳550001

出　　处：《贵州科学》2024年第4期1-5,共5页Guizhou Science

基　　金：贵州省基础计划〔2020〕1Y159;国家自然科学基金(42262002);贵州省科技计划项目(黔科合支撑〔2023〕一般200);贵州省2016年度高层次创新人才项目(〔2016〕21);贵州科学院创新人才团队能力提升工程(〔2019〕08)。

摘　　要：描述产于贵州省剑河县八郎村寒武系凯里组苗板坡剖面的网形贝一新种八郎网形贝Dictyonina balangia sp.nov.。其特征为:贝体中等大小,轮廓横椭圆形,双凸型,铰合线近直,主端钝角;腹壳近低锥状,喙明显,腹壳斜倾型;背壳凸度中等;壳面装饰复杂而美丽,斜凸放射线与同心线交叉,形成细密的网格状孔洞,这些孔洞在壳体边缘尺寸变大。八郎网形贝的发现,丰富了凯里生物群腕足类的物种信息,并为研究寒武纪腕足动物的辐射和多样性提供了重要的证据,同时也为研究腕足类壳面装饰形态的变化、系统分类及网形贝类形态特征提供新的材料。A new species of Dictyonina balangia sp.nov.,collected from the Kaili Formation at Miaobanpo Section,Balang Village,Jianhe County,Guizhou Province is described here.The shell body is medium,and the outline is transversely oval to semicircular,biconvex;the hinge line is nearly straight;the cardinal extremity is obtuse angle;the ventral valve is strongly convex with prominent beak;the ventral valve is apsacline;the dorsal valve is moderately convex;the shell decoration is complex and beautiful,and the shell surface is decorated with oblique radial and concentric lines;the two sets of lines cross,forming a fine grid of holes,and these holes grow in size at the edges.The discovery of Dictyonina balangia sp.nov.not only enriches the understanding of brachiopod community of Kaili Biota,but also provides new material for research on the ornamentation variations and morphology of Dictyonina shells.

关 键 词：网形贝 腕足类 凯里组 寒武系乌溜阶 贵州 

分 类 号：Q911[天文地球—古生物学与地层学]