Meyerasaurus Victor
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Meyerasaurus Victor

Meyerasaurus
Temporal range: Early Jurassic, 183-180 Ma
Meyerasaurus victor SMNS 12478.jpg
The holotype in the State Museum of Natural History Stuttgart
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Superorder: +Sauropterygia
Order: +Plesiosauria
Family: +Rhomaleosauridae
Genus: +Meyerasaurus
Smith & Vincent, 2010
Species:
M. victor
Binomial name
Meyerasaurus victor
(Fraas, 1910 [originally Plesiosaurus])
Synonyms

Plesiosaurus victor Fraas, 1910
Thaumatosaurus victor Fraas, 1910
Eurycleidus victor Zittel, 1932
Rhomaleosaurus victor Tarlo, 1960

Meyerasaurus is an extinct genus of rhomaleosaurid known from Holzmaden, Baden-Württemberg of southwestern Germany.[1]

Description

Restoration

Meyerasaurus is known from the holotype SMNS 12478, articulated and complete skeleton which preserved the skull, exposed in ventral view. The skull has a length of 37 cm (15 in), and the animal is about 3.35 m (11.0 ft) in length. It was collected from the Harpoceras elegantulum-falciferum ammonoid subzones, Harpoceras falcifer zone, of the famous Posidonien-Schiefer lagerstätte (Posidonia Shale), dating to the early Toarcian stage of the Early Jurassic, about 183-180 million years ago.[1]

Etymology

Meyerasaurus was first named by Adam S. Smith and Peggy Vincent in 2010 and the type species is Meyerasaurus victor. It was originally classified as a species of Plesiosaurus, later as the second named species of Thaumatosaurus (defunct name, meaning "wonder reptile") and ultimately as a species of Eurycleidus or Rhomaleosaurus. The generic name honors the German palaeontologist Hermann von Meyer for proposing the generic name Thaumatosaurus.[1]

Classification

3D animation showing the most likely swimming motions

The cladogram below shows Meyerasaurus phylogenetic position among other plesiosaurs, following Benson et al. (2012).[2]

Plesiosauria 
 Neoplesiosauria 

Pliosauridae

Plesiosauroidea

 Rhomaleosauridae 

Stratesaurus taylori

Macroplata tenuiceps

Avalonnectes arturi

Eurycleidus arcuatus

Meyerasaurus victor

See also

References

  1. ^ a b c Adam S. Smith and Peggy Vincent (2010). "A new genus of pliosaur (Reptilia: Sauropterygia) from the Lower Jurassic of Holzmaden, Germany" (PDF). Palaeontology. 53 (5): 1049-1063. doi:10.1111/j.1475-4983.2010.00975.x.CS1 maint: uses authors parameter (link)
  2. ^ Roger B. J. Benson, Mark Evans and Patrick S. Druckenmiller (2012). "High Diversity, Low Disparity and Small Body Size in Plesiosaurs (Reptilia, Sauropterygia) from the Triassic-Jurassic Boundary". PLoS ONE. 7 (3): e31838. doi:10.1371/journal.pone.0031838. PMC 3306369. PMID 22438869.CS1 maint: uses authors parameter (link)



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