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Turonian marine amniotes from the Bohemian Cretaceous Basin, Czech Republic

Published online by Cambridge University Press:  22 July 2013

BENJAMIN P. KEAR ,
BORIS EKRT ,
JOSEF PROKOP  and
GEORGIOS L. GEORGALIS
BENJAMIN P. KEAR*
Affiliation:
Palaeobiology Programme, Department of Earth Sciences, Uppsala University, Villavägen 16, SE-752 36 Uppsala, Sweden
BORIS EKRT
Affiliation:
Department of Paleontology, National Museum Prague; Václavské námĕstí 68, 115 79 Prague, Czech Republic
JOSEF PROKOP
Affiliation:
Department of Physical Electronics, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19, Prague, Czech Republic
GEORGIOS L. GEORGALIS
Affiliation:
School of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki 54 124Greece
*
†Author for correspondence: [email protected]
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Abstract

Despite being known for over 155 years, the Late Cretaceous marine amniotes of the Bohemian Cretaceous Basin in the Czech Republic have received little recent attention. These fossils are however significant because they record a diverse range of taxa from an incompletely known geological interval: the Turonian. The presently identifiable remains include isolated bones and teeth, together with a few disarticulated skeletons. The most productive stratigraphical unit is the Lower–Middle Turonian Bílá Hora Formation, which has yielded small dermochelyoid sea turtles, a possible polycotylid plesiosaur and elements compatible with the giant predatory pliosauromorph Polyptychodon. A huge protostegid, together with an enigmatic cheloniid-like turtle, Polyptychodon-like dentigerous components, an elasmosaurid and a tethysaurine mosasauroid have also been found in strata corresponding to the Middle–Upper Turonian Jizera Formation and Upper Turonian – Coniacian Teplice Formation. The compositional character of the Bohemian Cretaceous Basin fauna is compatible with coeval assemblages from elsewhere along the peri-Tethyan shelf of Europe, and incorporates the globally terminal Middle–Upper Turonian occurrence of pliosauromorph megacarnivores, which were seemingly replaced by mosasauroids later in the Cretaceous.

Keywords

faunal turnoverMosasauroideapalaeobiogeographyPlesiosauriaProtostegidae
Type
Original Articles
Information
Geological Magazine , Volume 151 , Issue 1 , January 2014 , pp. 183 - 198
Copyright
Copyright © Cambridge University Press 2013 

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