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标题：Calcium phosphate preservation of faecal bacterial negative moulds in hyaena coprolites
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作者：MARÍA DOLORES PESQUERO ; MARÍA DOLORES PESQUERO ; VIRGINIA SOUZA-EGIPSY 等
期刊名称：Acta Palaeontologica Polonica
印刷版ISSN：0567-7920
电子版ISSN：1732-2421
出版年度：2014
卷号：59
期号：4
页码：997-1005
DOI：10.4202/app.2012.0067
语种：English
出版社：Institute of Paleobiology PAS
摘要：The vertebrate fossil locality of La Roma 2, Spain (Upper Miocene, Late Vallesian, MN10) is characterised by a high abundance of mammalian coprolites, which provide direct clues to the diets and habitats of the organisms that produced them. X-ray diffraction analysis showed a sample of hyaena (cf. Lycyaena chaeretis) coprolites to be mostly composed of calcium phosphate. Ultrastructural SEM and TEM studies revealed three successive phases of preservation, including an initial phase of mineralisation that produced microspherulites within a very fine-grained cement. This indicates that most of the calcium phosphate present in the coprolites precipitated rapidly, which in turn facilitated the formation of negative moulds of faecal bacteria within the coprolite matrix.
关键词：Bacteria;hyaena coprolites;structural preservation;taphonomy;Miocene;Spain