Upper Norian conodonts from the Baoshan block, western Yunnan, southwestern China, and implications for conodont turnover.
Upper Norian conodonts from the Baoshan block, western Yunnan, southwestern China, and implications for conodont turnover.
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作者：
Zeng W;Jiang H;Chen Y;Ogg J;Zhang M;Dong H
晚诺利期的塞瓦蒂安期是生物更替和古气候、古环境变化的关键时期之一。本文报道了采自云南省保山市大水塘组和南树坝组诺利期上段的牙形石动物群，为研究塞瓦提斯期牙形石的多样性和生物地层学提供了新的资料。Mockina（M.）bidentata Zone和上部Parvigondolella（P.）根据M. andrusovi带的首次出现，确定了该区的M. bidentata和P.andrusovi。M. zapfei是详细的，并提出了各种种内形式。P_1元素共存在19种形式，与M. bidentata带，表明M.双齿带最上层M.根据M. bidentata带和P.andrusovi带的稀有牙形刺。中塞瓦蒂安期牙形石的更替表明三叠纪末生物大灭绝的延长阶段可能始于M。bidentata带至P.andrusovi带。
The Sevatian of the late Norian is one of the key intervals in biotic turnover and in changes of paleoclimate and paleoenvironments. Conodont faunas recovered from two sections of upper Norian strata of the Dashuitang and Nanshuba formations near Baoshan City in western Yunnan province provide new insights into the diversity and biostratigraphy of the Sevatian conodonts within China as well as globally. A lower Mockina (M.) bidentata Zone and an upper Parvigondolella (P.) andrusovi Zone are identified in this area according to the first occurrences of M. bidentata and of P. andrusovi. Rich conodont fauna of M. zapfei is detailed and presents various intraspecific forms. A total of 19 forms of P1 elements are presented, which, when combined with the reported conodonts in the M. bidentata Zone, suggest that there was a peak in conodont diversity within the M. bidentata Zone. A biotic crisis in the uppermost M. bidentata Zone is recognized from the contrast between the diverse conodont fauna in the M. bidentata Zone and the rare conodonts in the P. andrusovi Zone. The conodont turnover during the middle Sevatian highlights the fact that the prolonged phases of the end-Triassic mass extinction probably began in the transition interval from M. bidentata Zone to P. andrusovi Zone.
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DOI：
10.1016/s0031-0182(02)006545
发表时间：
2003-02-15
影响因子：
3
作者：
Channell, JET;Kozur, HW;Sykora, M
通讯作者：
Sykora, M
影响因子：
3.3
作者：
Du, Yixing;Onoue, Tetsuji;Rigo, Manuel
通讯作者：
Rigo, Manuel
影响因子：
3.1
作者：
Gale, Luka;Kolar-Jurkovsek, Tea;Rozic, Bostjan
通讯作者：
Rozic, Bostjan
四足动物进化的前半部分、取样代用物和化石记录的质量
DOI：
10.1016/j.palaeo.2012.09.005
发表时间：
2013-02-15
影响因子：
3
作者：
Benton, Michael J.;Ruta, Marcello;Sakamoto, Manabu
通讯作者：
Sakamoto, Manabu
影响因子：
3.9
作者：
Demangel, Isaline;Kovacs, Zsofia;Piller, Werner E.
通讯作者：
Piller, Werner E.