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Oldest record of wood-boring bivalves Ältester Nachweis Holz bohrender Muscheln

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Abstract:

Borings occurring in fossil driftwood are described from the basal Upper Pliensbachian (Margaritatus Zone, Stokesi Subzone) of the northern foreland of the Harz Mountains (Northwestern Germany, Lower Saxony). They belong to the ichnotaxon Leymerie, 1842 ( Kelly & Bromley, 1984) and represent the hitherto worldwide stratigraphically oldest record of wood-borings produced by bivalves. A possible relationship between the appearance of wood-boring bivalves and the extinction of pseudoplanktic crinoids attached to driftwood is discussed, but seems unlikely.

German
Bohrgänge in fossilen Treibhölzern werden aus dem basalen Ober-Pliensbachium (Margaritatus-Zone, Stokesi-Subzone) des nördlichen Harzvorlandes (Nordwestdeutschland, Niedersachsen) beschrieben und dem Ichnotaxon Teredolites Leymerie, 1842 (T. longissimus Kelly & Bromley, 1984) zugerechnet, das auf Bohrmuscheln zurückgeführt wird. Sie stellen den bislang stratigraphisch weltweit ältesten Nachweis für Bohrmuschelgänge in Hölzern dar. Eine mögliche Beziehung zwischen dem Auftreten Holz bohrender Muscheln und dem Verschwinden pseudoplanktisch auf Treibholz lebender Crinoiden wird diskutiert, erscheint jedoch unwahrscheinlich.

Keywords: DRIFTWOOD; FOSSIL RECORD; GERMANY; JURASSIC; TEREDOLITES; UPPER PLIENSBACHIAN

Language: German

Document Type: Research Article

DOI: http://dx.doi.org/10.1127/0077-7749/2007/0244-0261

Publication date: June 1, 2007

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