Chondrichthyans from the Lower Clayton Limestone Unit of the Midway Group (Paleocene) near Malvern, Arkansas, USA, with comments on the K/Pg boundary
Chondrichthyans from the Lower Clayton Limestone Unit of the Midway Group (Paleocene) near Malvern, Arkansas, USA, with comments on the K/Pg boundary
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来自美国阿肯色州马尔文附近中途岛群(古新世)下克莱顿石灰岩单元的软骨鱼,以及对 K/Pg 边界的评论
DOI:
10.1007/s12542-019-00494-7
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发表时间:
2019
期刊:
影响因子:
1.8
通讯作者:
Griffiths, Michael L.
中科院分区:
文献类型:
--
作者:
Maisch, Harry M.;Becker, Martin A.;Griffiths, Michael L.
The Lower Clayton Limestone Unit (LCLU) of the Midway Group (Paleocene) near Malvern, Arkansas, USA contains an assemblage of chondrichthyans recently exposed by excavation for highway stabilization. Chondrichthyan teeth in this assemblage belong to at least 12 taxa including:Ginglymostoma subafricanum,Carchariascf.whitei,Carchariassp.,Odontaspis winkleri,Palaeohypotodus rutori,Palaeogaleus vincenti,Dasyatiscf.hexagonalis,Dasyatissp.,Hypolophitessp.,Myliobatissp.,Rhinopterasp., and an indeterminate chimaerid. Locally, these chondrichthyans occur within a stratigraphic section directly above the Cretaceous–Paleogene (K/Pg) boundary that also contains chondrichthyans. This occurrence is uncommon in the global fossil record and provides an opportunity to (1) assess chondrichthyan diversity across the K/Pg boundary in the Malvern region and Gulf Coastal Plain of southwestern Arkansas and (2) evaluate the timing of marginal to shallow marine chondrichthyan faunal turnover and extinction at a proximal location ≈ 1500 km from the Chicxulub, Mexico, K/Pg impact site. Observed patterns within this K/Pg stratigraphic section indicate that changes in chondrichthyan assemblages are primarily the result of sea-level cyclicity and habitat losses that occurred across several million years.
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影响因子:
56.9
作者:
ALVAREZ, LW;ALVAREZ, W;MICHEL, HV
通讯作者:
MICHEL, HV
影响因子:
5.8
作者:
K. Miller;R. Sherrell;J. Browning;M. P. Field;W. B. Gallagher;R. Olsson;P. Sugarman;S. Tuorto;H. Wahyudi
通讯作者:
H. Wahyudi
DOI:
--
发表时间:
1943
期刊:
影响因子:
--
作者:
E. Dartevelle;E. Casier
通讯作者:
E. Casier
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
E. Mancini;T. M. Pucke
通讯作者:
T. M. Pucke
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
Y. Zakharov;A. Popov;Y. Shigeta;O. P. Smyshlyaeva;E. Sokolova;R. Nagendra;T. Velivetskaya;T. B. Afanasyeva
通讯作者:
T. B. Afanasyeva