The trace fossil Nummipera eocenica from the Tatra Mountains, Poland : morphology and palaeoenvironmental implications

doi:10.1111/j.1502-3931.2011.00289.x

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

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punktacja MEiN [2012 A]: 35

title:	The trace fossil Nummipera eocenica from the Tatra Mountains, Poland : morphology and palaeoenvironmental implications
author:	Jach Renata , Machaniec Elżbieta , Uchman Alfred
journal title:	Lethaia
volume:	45
issue:	3
date of publication :	2012
year:	2011
pages:	342-355
ISSN:	0024-1164
eISSN:	1502-3931
DOI:	10.1111/j.1502-3931.2011.00289.x
language:	English
journal language:	English
abstract in English:	The tubular trace fossil Nummipera eocenica Hölder 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.
keywords in English:	Bartonian, burrow, Carpathians, large foraminifera, trace fossils
affiliation:	Wydział Biologii i Nauk o Ziemi : Instytut Nauk Geologicznych
type:	journal article
subtype:	academic paper

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