中国海相早三叠世弓鲛鱼类(软骨鱼类)的首次报道——华南二叠系—三叠系界线上下鱼类序列研究之一  

EARLY TRIASSIC HYBODONTOIDEA FROM TIANDONG OFGUANGXI,CHINA--First Report on the Fish Sequence Study Near the Permian Triassic Boundary in South China

作　　者：王念忠[1] 杨守仁[2] 金帆[1] 王炜[1] 

机构地区：[1]中国科学院古脊椎动物与古人类研究所,北京100044 [2]北京大学地质系,北京100871

出　　处：《古脊椎动物学报》2001年第4期237-250,T001,共15页Vertebrata Palasiatica

基　　金：国家自然科学基金项目 (编号 :4 9872 0 1 0 );中国科学院古生物学与古人类学科基础研究特别支持费项目 (编号 :980 1 0 1 );国家重点基础研究发展规划项目 (编号 :G2 0 0 0 0 7770 5 )资助~~

摘　　要：广西田东县作登下三叠统罗楼组产出弓鲛鱼类 :作登弓鲛Hyboduszuodengensis(Yangetal.)、乐氏弓鲛H .yohi (Yangetal.)和田东多尖齿鱼 (新种 )Polyacrodustiandongensissp .nov .,其中前二种化石以前曾被作为牙形类报道。这是弓鲛鱼类在中国海相早三叠世的首次报道。另外 ,本组还产出属种未定的硬骨鱼类化石 (Osteichthyesgen .etsp .indet.)。建立了我国海相早三叠世第一个鱼类带化石 ,作登弓鲛—乐氏弓鲛组合带 (Hyboduszuodengensis H .yohiAZ) ;伴生的有Neospathodushomeri N .triangularis牙形类带化石 ,该带化石延续的时限为奥伦尼克阶 (Olenekian)司帕斯期 (Spathian)早期。The materials dealt with in this paper were collected from the Luolou Formation of Zuodeng area, Tiandong County of Guangxi Zhuang Autonomous Region, China (Figs. 1,2). They include three hybodontoid species: Hybodus zuodengensis (Yang et al., 1984), H. yohi (Yang et al., 1984) and Polyacrodus tiandongensis sp. nov., and an indeterminate osteichthyan fish. The two species of Hybodus were initially identified as conodonts-Pachycladina zuodengensis and Pseudogondalella yohi by Yang et al. in 1984.This is the first report on the occurrence of marine Early Triassic Hybodontoidea in China. With the reassignment and new discovery of these fishes, a fish assemblage (Hybodus zuodengensis H. yohi Zone) is established, which is the only Triassic fish zonation in China. The age of this zonation is Early Triassic (early Spathian of Olenekian Stage) for it makes its appearance just in the conodont Neospathodus homeri N. triangularis Zone.

关 键 词：广西 海相 早三叠世 弓鲛鱼类 鱼类带化石 

分 类 号：Q915.862[天文地球—古生物学与地层学]