Abstrakt
A rich collection of exceptionally preserved Lower Triassic fossil fish
remains obtained during the Polish Spitsbergen Expedition of 2005 includes
many isolated teeth believed to belong to a saurichthyid actinopterygian.
Stable isotope analysis ( d 13 C and d 18 O) of putative Saurichthys teeth
from the Hornsund area (South Spitsbergen) acting as a paleoenvironmental
proxy has permitted trophic−level reconstruction and comparison with other
Lower Triassic fish teeth from the same location. The broader range of d
13 C values obtained for durophagous teeth of the hybodont selachian,
Lissodus , probably reflects its migratory behaviour and perhaps a greater
feeding diversity. X−ray microcomputed tomography (XMT), a non−destructive
technique, is used for the first time in order to elucidate de − tails of
tooth histology, the results of which suggest that the method has
considerable potential as a future analytical tool.
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