江西乐平地区晚二叠世—早三叠世的牙形石动物群
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摘要
讨论了赣中乐平地区沿沟剖面上二叠统至下三叠统地层的牙形石动物群 ,列出了牙形石的各个形态属种在地层中的分布及其数量变化。根据特征牙形石分子的地层分布 ,将该段地层自下而上划分为 3个牙形石带 ,分别是 :Clarkinachangxingensis Cl.deflecta Cl.subcarinata组合带 ;Hind eoduslatidentatus带和Hindeodusparvus带。鉴于在晚二叠世至早三叠世 ,Hindeodus属种的牙形石分子的Pa分子成为界定种之间的主要标志特征 ,本文描述了两个重要牙形石种即Hindeoduslatidenta tus和Hindeodusparvus的Pa分子 ,并探讨了二者之间所具有的演化关系 ;此外 ,还指出这些保存完美的Pa分子具有重要的研究价值
The Conodont Fauna of late Permian to early Triassic from Yangou section in Leping area,Jiangxi Province was discussed in this paper.All of the Conodont individuals founded in this section were listed in a figure.According to the distribution of the important conodont elements,this section was divided into three conodont zones from the upper permian to the lower Triassic:Clarkina.changxingensis,Cl.deflecta and Cl.subcarinata Assemblage Zone;Hindeodus latidentatus Zone and Hindeodus parvus Zone.According to the significant meaning of Hindeodus's Pa elements,this article described two important Pa elements of Hindeodus,namely H.latidentatus and H.parvus,discussed evolutionary relation between them;The perfectly preserved Pa elements of this two conodont species are of great research value.
The Conodont Fauna of late Permian to early Triassic from Yangou section in Leping area,Jiangxi Province was discussed in this paper.All of the Conodont individuals founded in this section were listed in a figure.According to the distribution of the important conodont elements,this section was divided into three conodont zones from the upper permian to the lower Triassic:Clarkina.changxingensis,Cl.deflecta and Cl.subcarinata Assemblage Zone;Hindeodus latidentatus Zone and Hindeodus parvus Zone.According to the significant meaning of Hindeodus's Pa elements,this article described two important Pa elements of Hindeodus,namely H.latidentatus and H.parvus,discussed evolutionary relation between them;The perfectly preserved Pa elements of this two conodont species are of great research value.
引文
1KozurH .SomeRemarkstotheConodontsHindeodusandIsarcicellaintheLatestPermianandEarliestTriassic.Palae oworld,1995:64~77
2王成源,王尚启.江西二叠—三叠系界线层的牙形刺及Hindeodus—Isarcicella的演化谱系.古生物学报,1997,36(2):151~168
3杨守仁,郝维城,王新平.广西二叠—三叠系界线层牙形石演化、分带及二叠—三叠系界线.中国古特提斯生物及地质变迁.北京:北京大学出版社,1999.81~95
4ZhangKX ,LaiXL ,DingMH ,etal.ConodontSequenceanditsGlobalCorrelationofPermianTriassicBoundaryinMeishanSection,Changxing,ZhejiangProvince.EarthScience,JournalofChinaUniversityofGeosciences,1995,20(6):669~676
5TianShugang.EvolutionofConodontGeneraNeogondolella,HindeodusandIsarcicellainNorthwesternHuanan,Chi na.StratigraphyandPaleontologyofChina,1993,2
6DingMeihua,ZhangKexin,LaiXulong.EvolutionofClarkinaLineageandHindeodusIsarcicellaLineageatMeishanSection,SouthChina.In:YinHEd.,ThePalaeozoicMesozoicBoundaryCandidatesofGlobalStratotypeSectionandPointofthePermianTriassicBoundary.Wuhan:ChinaUniversityofGeosciencesPress,1996.65~71
7王成源.二叠—三叠系界线层的牙形刺与生物地层界线.古生物学报,1995,34(2):129~151
8张克信.浙江长兴地区二叠—三叠纪之交牙形石动物群及地层意义.地球科学,武汉地质学院学报,1987,12(2):193~200
9朱相水,王成源,吕桦,等.江西二叠—三叠系界线.微体古生物学报,1994,11(4):439~452
10朱相水,林联盛.典型Hindeodusparvus及其意义———兼论二叠—三叠系界线.江西师范大学学报(自然科学版),1997,21(1):88~95
11朱相水,吕桦,林联盛,等.江西北部P\T界线层中Hindeodusparvus的再研究———兼论P \T界线.江西师范大学学报(自然科学版),1997,21(增刊):11~15
2王成源,王尚启.江西二叠—三叠系界线层的牙形刺及Hindeodus—Isarcicella的演化谱系.古生物学报,1997,36(2):151~168
3杨守仁,郝维城,王新平.广西二叠—三叠系界线层牙形石演化、分带及二叠—三叠系界线.中国古特提斯生物及地质变迁.北京:北京大学出版社,1999.81~95
4ZhangKX ,LaiXL ,DingMH ,etal.ConodontSequenceanditsGlobalCorrelationofPermianTriassicBoundaryinMeishanSection,Changxing,ZhejiangProvince.EarthScience,JournalofChinaUniversityofGeosciences,1995,20(6):669~676
5TianShugang.EvolutionofConodontGeneraNeogondolella,HindeodusandIsarcicellainNorthwesternHuanan,Chi na.StratigraphyandPaleontologyofChina,1993,2
6DingMeihua,ZhangKexin,LaiXulong.EvolutionofClarkinaLineageandHindeodusIsarcicellaLineageatMeishanSection,SouthChina.In:YinHEd.,ThePalaeozoicMesozoicBoundaryCandidatesofGlobalStratotypeSectionandPointofthePermianTriassicBoundary.Wuhan:ChinaUniversityofGeosciencesPress,1996.65~71
7王成源.二叠—三叠系界线层的牙形刺与生物地层界线.古生物学报,1995,34(2):129~151
8张克信.浙江长兴地区二叠—三叠纪之交牙形石动物群及地层意义.地球科学,武汉地质学院学报,1987,12(2):193~200
9朱相水,王成源,吕桦,等.江西二叠—三叠系界线.微体古生物学报,1994,11(4):439~452
10朱相水,林联盛.典型Hindeodusparvus及其意义———兼论二叠—三叠系界线.江西师范大学学报(自然科学版),1997,21(1):88~95
11朱相水,吕桦,林联盛,等.江西北部P\T界线层中Hindeodusparvus的再研究———兼论P \T界线.江西师范大学学报(自然科学版),1997,21(增刊):11~15
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