PALEOENVIRONMENTAL AND BIOSTRATIGRAPHIC IMPLICATIONS OF ECHINODERM OSSICLES TRAPPED WITHIN BURMESE AMBER
PALEOENVIRONMENTAL AND BIOSTRATIGRAPHIC IMPLICATIONS OF ECHINODERM OSSICLES TRAPPED WITHIN BURMESE AMBER
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DOI：
10.2110/palo.2019.084
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发表时间：
2019-12
期刊：
影响因子：
1.6
通讯作者：
M. Salamon;Jih-Pai Lin;P. Duda;P. Gorzelak;W. Ausich;T. Oji
中科院分区：
文献类型：
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作者：
M. Salamon;Jih-Pai Lin;P. Duda;P. Gorzelak;W. Ausich;T. Oji
翻译后摘要：海洋生物是不寻常的保存在琥珀中。最近，有报道称它们与缅甸琥珀有关。然而，以前报道的大多数标本都保存在琥珀表面或琥珀周围的沉积物中。基于X射线断层扫描和薄片光学显微镜的缅甸琥珀，我们在这里报告的第一个真正的和明确的证据，包括海百合小骨保存在化石树脂。在琥珀中保存这个专门的海洋群体，可以深入了解海百合-琥珀协会的古环境，并提供额外的证据来支持以前对白垩纪中期浅水海百合的观察，当时许多海百合由于中生代海洋革命期间捕食压力增加而开始向海上转移。海百合的遗骸，以断节的茎和臂小骨为代表，可归属于等海百合。legeri（Repelin）指出缅甸琥珀的时代为白垩纪中期，并支持之前的一些假设，即产树脂的树木与海水之间距离很近。
Abstract: Marine organisms are uncommonly preserved in amber. Recently, they were reported to be associated with Burmese amber. However, most of specimens from previous reports were preserved on the amber surface or within the sediment surrounding the amber. Based on X-ray tomography and thin-section optical microscopy of Burmese amber, we report here the first genuine and unambiguous evidence of inclusion of crinoid ossicles preserved in the fossil resin. Preservation of this exclusively marine group in amber gives insights into the paleoenvironment of the crinoid-amber association and provides additional evidence to support previous observations of shallow-water stalked crinoids from the mid-Cretaceous, when many stalked crinoids started to shift offshore due to increased predation pressure during the Mesozoic Marine Revolution. Crinoid remains, represented by disarticulated stem and arm ossicles assignable to Isocrinus cf. legeri (Repelin), point to a mid-Cretaceous age for the Burmese amber and support some previous hypotheses suggesting a close proximity between the resin-producing trees and seawater.