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In may 2007, the ULiège's Administrative Board (joined in June 2007 by the FUSAGx) decided to create an institutional repository and defined a strong institutional self-archiving policy to increase the visibility, accessibility and impact of the University's publications (ULiège mandate).

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Paper

Written Paper

Peculiar macrophagous adaptations in a new Cretaceous pliosaurid  [2015]

Fischer, Valentin; Arkhangelsky, Maxim; Stenshin, Ilya; Uspensky, Gleb; et al. Newton Internal Fellowship (Royal Society, UK) [Corporate Author] Vocatio Foundation (Belgium) [Corporate Author] Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS [Corporate Author]

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During the Middle and Late Jurassic, pliosaurid plesiosaurs evolved gigantic body size and a series of craniodental adaptations that have been linked to the occupation of an apex predator niche. Cretaceous pliosaurids (i.e. Brachaucheninae) depart from this morphology, being slightly smaller and lacking the macrophagous adaptations seen in earlier forms. However, the fossil record of Early Cretaceous pliosaurids is poor, concealing the evolution and ecological diversity of the group. Here, we report a new pliosaurid from the Late Hauterivian (Early Cretaceous) of Russia. Phylogenetic analyses using reduced consensus methods recover it as the basalmost brachauchenine. This pliosaurid is smaller than other derived pliosaurids, has tooth alveoli clustered in pairs and possesses trihedral teeth with complex serrated carinae. Maximum-likelihood ancestral state reconstruction suggests early brachauchenines retained trihedral teeth from their ancestors, butmodified this feature in a uniqueway, convergent with macrophagous archosaurs or sphenacodontoids. Our findings indicate that Early Cretaceous marine reptile teeth with serrated carinae cannot be unequivocally assigned to metriorhynchoid crocodylomorphs. Furthermore, they extend the known diversity of dental adaptations seen in Sauropterygia, the longest lived clade of marine tetrapods.

Bibliographic information

Language:
English
In AGRIS since:
2021
Volume:
150552.
Extent:
1–12
Publisher:
Royal Society Publishing
All titles:
"Peculiar macrophagous adaptations in a new Cretaceous pliosaurid"@eng
Other:
"peer reviewed"
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Bibliographic information

Language:
English
In AGRIS since:
2021
Volume:
150552.
Extent:
1–12
Publisher:
Royal Society Publishing
All titles:
"Peculiar macrophagous adaptations in a new Cretaceous pliosaurid"@eng
Other:
"peer reviewed"