Genre
Valide Éteint

Sisteronia

Fischer et al. 2014

Sisteronia is an extinct genus of platypterygiine ophthalmosaurid ichthyosaur known from the 'middle' Cretaceous of southeastern England and southeastern France. It contains a single species, Sisteronia seeleyi.

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Plage temporelle
Trias
Jurassique
Crétacé
Paléogène
Néogène
252 201 145 66 0 Ma
Occurrences PBDB
6
Groupe
Ichtyosaures
Carnivore nektonic Marin
Sisteronia
cliquer pour agrandir
Sisteronia seeleyi, basicranium. A, B: basisphenoid (RGHP SI 2) in dorsal (A) and ventral (B) views. C: basioccipital (CAMSM B57943) in posterior view. D: holotype basioccipital (CAMSM B58257_67) in dorsal view. E–G: supraoccipital (RGHP SI 2) in posterior (E) and anterolateral (otic) (F, G) views. H–J: left opisthotic (CAMSM B58257_67) in posterior (H) and anterior (otic) (I, J) views. K: left stapes (RGHP SI 2) in posterior view. Note the extremely reduced (nearly absent) extracondylar area of the basioccipital, a platypterygiine synapomorphy, and the dorsal process posterior to a triangular depression (delineated by the thick dotted line) on the basioccipital, an autapomorphy of Sisteronia seeleyi. Abbreviations: AVSC: impression of the anterior vertical semicircular canal of the otic labyrinth; HSC: impression of the horizontal semicircular canal of the otic labyrinth; PVSC: impression of the posterior vertical semicircular canal of the otic labyrinth; UPL: impression of the utricular portion of the otic labyrinth; Vag: vagus foramen. © Valentin Fischer, Nathalie Bardet, Myette Guiomar, Pascal Godefroit · CC BY 2.5 · Wikimedia

Légende en anglais — traduction française non disponible.

PBDB ↗ Wikipedia ↗
Classification
Ichthyosauria Clade non classé
›
Baracromia Clade non classé
›
Ophthalmosauridae Famille
›
Platypterygiinae Sous-famille
›
Sisteronia Genre
Sites de découverte 6 sites géolocalisés
Répartition
Principaux pays
🇬🇧 Royaume-Uni
3
🇫🇷 France
2
🇷🇺 Russie
1
Formations géologiques
Marnes bleues
2
Gault
1
West Melbury Marly Chalk
1
Distribution temporelle
Cénomanien (100.5–93.9 Ma)
2
Albien (113.2–100.5 Ma)
4
Espèces (1)
Sisteronia seeleyi 113 Ma
Images 1
Bibliographie
Description originale
V. Fischer, N. Bardet, and M. Guiomar, P. Godefroit. 2014. High diversity in Cretaceous ichthyosaurs from Europe prior to their extinction. PLoS ONE 9(1):e84709 DOI ↗
Bibliographie (2)
V. Fischer, N. Bardet, and R. B. J. Benson, M. S. Arkhangelsky, M. Friedman. 2016. Extinction of fish-shaped marine reptiles associated with reduced evolutionary rates and global environmental volatility. Nature Communications 7(10825):1-11 DOI ↗
V. Fischer, N. Bardet, and M. Guiomar, P. Godefroit. 2014. High diversity in Cretaceous ichthyosaurs from Europe prior to their extinction. PLoS ONE 9(1):e84709 DOI ↗