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首页> 外文期刊>Lethaia: An International Journal of Palaeontology and Stratigraphy >The trace fossil Nummipera eocenica from the Tatra Mountains, Poland: Morphology and palaeoenvironmental implications
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The trace fossil Nummipera eocenica from the Tatra Mountains, Poland: Morphology and palaeoenvironmental implications

机译：波兰塔特拉山遗迹化石Nummmipera eocenica：形态学和古环境意义

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摘要

The tubular trace fossil Nummipera eocenicaH?lder 1989 occurs in a single stratigraphical horizon in Eocene nummulitic limestones of the Tatra Mountains, Poland. The wall of N. eocenica is built of Discocyclina and Nummulities (larger foraminifera) tests, very rarely of the Ditrupa (Polychaeta) tube fragments, bivalve shell fragments, echinoid spines and coralline algae. Morphotype are distinguished on the basis of wall composition and structure. Morphotype A is dominated by fusiform Discocyclina tests, which were preferentially selected by the trace makers for construction of a well-constructed and resistant wall. Morphotype B contains more robust tests of Nummulites, while morphotype C is dominated by saddle-shaped tests of Discocyclina. Nummipera eocenica was produced during a period of seafloor stabilization caused by a deepening. The succession of the morphotypes B, A reflects diminishing energy and increasing water depth. Probably morphotype C represents even lower energy environment than morphotype A. The trace fossil is interpreted as a domichnion, which wall was constructed for protection. The trace maker can be considered between polychaetes and crustaceans; however, comparisons to the closest recent analogues, the polychaete Diopatra cuprea or alpheid shrimps, are not satisfactory. □Bartonian, burrow, Carpathians, large foraminifera, trace fossils.
机译：管状微量化石Nummmipera eocenicaHlder 1989发生在波兰塔特拉山的始新世云母灰岩的单一地层中。 N. eocenica的墙是用Discocyclina和Nummulities（较大的有孔虫）试验建造的，很少有Ditrupa（Polychaeta）试管碎片，双壳类贝壳碎片，棘突棘和珊瑚藻的建造。形态型根据壁的组成和结构进行区分。形态A型以梭形Discocyclina测试为主，后者由迹线制造商优先选择以建造结构良好且耐久的墙。形态型B包含更强大的云母测试，形态型C以Discocyclina的鞍形测试为主。在加深引起的海底稳定期间，产生了Numpipera eocenica。 B，A形态类型的继承反映了能量的减少和水深的增加。形态C可能代表比形态A更低的能量环境。微量化石被解释为是一个住所，该壁是为了保护而构造的。示踪剂可考虑在多壳类动物和甲壳类动物之间使用。然而，与最近的类似物，多毛DiDiopatra cuprea或alpheid虾的比较并不令人满意。 □巴顿，洞穴，喀尔巴阡，大型有孔虫，微量化石。

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