DOI: 10.1016/j.palaeo.2015.04.004
论文题名: Evolution of the last koninckinids (Athyridida, Koninckinidae), a precursor signal of the early Toarcian mass extinction event in the Western Tethys
作者: Baeza-Carratalá J.F. ; García Joral F. ; Giannetti A. ; Tent-Manclús J.E.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 429 起始页码: 41
结束页码: 56
语种: 英语
英文关键词: Early Jurassic
; Koninckinids
; Mass extinction
; Western Tethys
英文摘要: Koninckinids are a suitable group to shed light on the biotic crisis suffered by brachiopod fauna in the Early Jurassic. Koninckinid fauna recorded in the late Pliensbachian-early Toarcian from the easternmost Subbetic basin is analyzed and identified as a precursor signal for one of the most conspicuous mass extinction events of the Phylum Brachiopoda, a multi-phased interval with episodes of changing environmental conditions, whose onset can be detected from the Elisa-Mirabile subzones up to the early Toarcian extinction boundary in the lowermost Serpentinum Zone (T-OAE). The koninckinid fauna had a previously well-established migration pattern from the intra-Tethyan to the NW-European basins but a first phase with a progressive warming episode in the Pliensbachian-Toarcian transition triggered a koninckinid fauna exodus from the eastern/central Tethys toward the westernmost Mediterranean margins. A second stage shows an adaptive response to more adverse conditions in the westernmost Tethyan margins and finally, an escape and extinction phase is detected in the Atlantic areas from the mid-Polymorphum Zone onwards up to their global extinction in the lowermost Serpentinum Zone. This migration pattern is independent of the paleogeographic bioprovinciality and is unrelated to a facies-controlled pattern. The anoxic/suboxic environmental conditions should only be considered as a minor factor of partial control since well-oxygenated habitats are noted in the intra-Tethyan basins and this factor is noticeable only in the second westward migratory stage (with dwarf taxa and oligotypical assemblages). The analysis of cold-seep proxies in the Subbetic deposits suggests a radiation that is independent of methane releases in the Subbetic basin. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68934
Appears in Collections: 过去全球变化的重建
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作者单位: Departamento de Ciencias de la Tierra y Medio Ambiente, Universidad Alicante, Apdo. 99, San Vicente del Raspeig, Alicante, Spain; Departamento de Paleontología, Facultad de Ciencias Geológicas, Universidad Complutense, C/José Antonio Novais 12, Madrid, Spain
Recommended Citation:
Baeza-Carratalá J.F.,García Joral F.,Giannetti A.,et al. Evolution of the last koninckinids (Athyridida, Koninckinidae), a precursor signal of the early Toarcian mass extinction event in the Western Tethys[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,429