Articles | Volume 12, issue 23
Biogeosciences, 12, 6945–6954, 2015
https://doi.org/10.5194/bg-12-6945-2015
Biogeosciences, 12, 6945–6954, 2015
https://doi.org/10.5194/bg-12-6945-2015
Research article
07 Dec 2015
Research article | 07 Dec 2015

Stable isotope study of a new chondrichthyan fauna (Kimmeridgian, Porrentruy, Swiss Jura): an unusual freshwater-influenced isotopic composition for the hybodont shark Asteracanthus

L. Leuzinger et al.

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Short summary
We measured the oxygen isotopic composition of Late Jurassic chondrichthyan teeth (sharks, rays, chimaeras) from the Swiss Jura to get ecological information. The main finding is that the extinct shark Asteracanthus (Hybodontiformes) could inhabit reduced salinity areas, although previous studies on other European localities always resulted in a clear marine isotopic signal for this genus. We propose a mainly marine ecology coupled with excursions into areas of lower salinity in our study site.
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