Genre
Valide Éteint

Shastasaurus

Merriam 1895

Shastasaurus est un genre fossile de très grands ichthyosaures, des diapsides marins de la famille des Shastasauridaequi vivaient dans ce qui est aujourd'hui l'Amérique du Nord. Il a été découvert en Californie et au Nevada (États-Unis) ainsi qu'au Mexique. Elles ont vécu durant le Trias supérieur, il y a environ entre 237 et 201 Ma.

Plage temporelle
Trias
Jurassique
Crétacé
Paléogène
Néogène
252 201 145 66 0 Ma
Occurrences PBDB
10
Groupe
Ichtyosaures
Carnivore nektonic Marin
Shastasaurus
cliquer pour agrandir
Partial skull of Shastasaurus pacificus (UCMP 9017) from the Late Triassic of California, USA, in (A) lateral, (B) dorsal, and (C) anterolateral view. Based on this skull, Shastasaurus has repeatedly been reconstructed with a long, tooth-bearing rostrum. However, note the slenderness of the lower jaw (B, C) and the strong anterior taper of the snout (B), both of which are more consistent with the abbreviated and toothless snout of Shastasaurus liangae comb. nov. than with the traditional long-snouted reconstruction of this skull (as, e.g., in references [22] and [23]). © P. Martin Sander1*, Xiaohong Chen2, Long Cheng2, Xiaofeng Wang2 · CC BY 2.5 · Wikimedia

Légende en anglais — traduction française non disponible.

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Classification
Ichthyosauria Clade non classé
›
Hueneosauria Clade non classé
›
Merriamosauria Clade non classé
›
Shastasauridae Famille
›
Shastasaurus Genre
Sites de découverte 10 sites géolocalisés
Répartition
Principaux pays
🇺🇸 États-Unis
7
🇲🇽 Mexique
2
🇨🇦 Canada
1
Formations géologiques
Hosselkus
5
Antimonio
2
Hosselkus Limestone
1
Martin Bridge
1
Pardonet
1
Distribution temporelle
Norien (227.3–205.7 Ma)
5
Carnien (237–227.3 Ma)
5
Espèces (9)
Shastasaurus alexandrae 252 Ma
Shastasaurus altispinus subjective synonym of Shastasaurus pacificus 237 Ma
Shastasaurus careyi 237 Ma
Shastasaurus carinthiacus nomen dubium, species not entered Shastasaurus
Shastasaurus merriami nomen dubium, species not entered Shastasaurus
Shastasaurus nordensis nomen dubium, species not entered Shastasaurus
Shastasaurus osmonti subjective synonym of Shastasaurus pacificus 237 Ma
Shastasaurus pacificus 237 Ma
Shastasaurus sikkaniensis 215 Ma
Synonymes (3)
Shastasaurus carinthiacus nomen dubium, species not entered Shastasaurus
Shastasaurus merriami nomen dubium, species not entered Shastasaurus
Shastasaurus nordensis nomen dubium, species not entered Shastasaurus
Images 2
Bibliographie
Description originale
J. C. Merriam. 1895. On some Reptilian Remains from the Triassic of Northern California. American Journal of Science 50(295):55 DOI ↗
Bibliographie (8)
E. L. Nicholls and M. Manabe. 2004. Giant ichthyosaurs of the Triassic - a new species of Shonisaurus from the Pardonet Formation (Norian: Late Triassic) of British Columbia. Journal of Vertebrate Paleontology 24(4):838-849 DOI ↗
S. G. Lucas and C. M. González-León. 1995. Ichthyosaurs from the Upper Triassic of Sonora and the biochronology of Triassic ichthyosaurs. Geological Society of America Special Paper 301:17-20 DOI ↗
J. M. Mazin and P. M. Sander. 1993. Palaeobiogeography of the Early and Late Triassic ichthyopterygia. Paleontologia Lombarda 2:93-107
J. M. Callaway and J. A. Massare. 1989. Shastasaurus altispinus (Ichthyosauria, Shastasauridae) from the Upper Triassic of the El Antimonio District, northwestern Sonora, Mexico. Journal of Paleontology 63(6):930-939 DOI ↗
W. N. Orr and K. T. Katsura. 1985. Oregon's oldest vertebrates [Ichthyosauria(Reptilia)]. Oregon Geology 47(7):75-77
J. C. Merriam. 1908. Triassic Ichthyosauria. Memoirs of the University of California 1(1):1-155 DOI ↗
J. C. Merriam. 1906. Notes on the osteology of the thalattosaurian genus Nectosaurus. University of California Publications, Bulletin of the Department of Geology 5(13):217-223
J. C. Merriam. 1895. On some Reptilian Remains from the Triassic of Northern California. American Journal of Science 50(295):55 DOI ↗