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Otoliths from casts from the Eocene Lillebaelt Clay Formation of Trelde Næs near Fredericia (Denmark), with remarks on the diet of stomatopods

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Abstract:

Fish otoliths are described from 38 casts of otolith solution imprints in mudstone rocks of the early Early to Middle Eocene (Late Ypresian to Early Lutetian) from Trelde Naes near Fredericia in Denmark. A total of 12 species are recognized and two are described as new, Pseudoxenomystax treldeensis n.sp., genus Caproidarum madseni n.sp. This is the first record of otoliths from casts prepared from solution imprints. Their identification has been facilitated by the development of an impregnation technique by M. MADSEN (Fredericia), which opens the potential of associating fossil fish skeleton findings with isolated otolith findings in future research. A certain proportion of the otolith casts investigated originate from imprints in burrows of stomatopod crustaceans thus allowing insight into the diet of these highly specialised carnivorous animals during Eocene times. Other otolith casts originate from incomplete fish skulls, which are not identifiable to the species level.

Keywords: CASTS; DENMARK; EOCENE; OTOLITHS; TELEOSTEI

Document Type: Research Article

DOI: http://dx.doi.org/10.1127/0077-7749/2007/0246-0069

Publication date: October 1, 2007

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