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Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)

The ichnofossil Rusophycus cf. cryptolithi Osgood, 1970 as a trace of the trilobite Deanaspis goldfussi (Barrande, 1846) from the Letná Formation (Upper Ordovician, Barrandian area, Czech Republic)

Radek Mikuláš, Petr Budil

Geoscience Research Reports 46, 2013 (GRR for 2012), pages 192–194

Keywords: Trace fossils, Barrandian area, Upper Ordovician, trinucleoid trilobites

Map sheets: Praha (12-24)

Full text (PDF, 0.28 MB)

Abstract

The trace fossil Rusophycus cf. cryptolithi Osgood, 1970 from the Letná Formation (Ordovician, Sandbian) of the Barrandian area is interpreted as a feeding-resting trace of the trinucleoid trilobite Deanaspis goldfussi (Barrande, 1846). Preferential orientation of the traces indicates partly passive filtering of organic particles with using the appendages, large perforated fringe and a vaulted cephalic chamber of D. goldfussi but apparently boosted by the sea current which supplied the organic particles to the animal.