Purranisaurus

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Purranisaurus
Temporal range: Tithonian
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Archosauria
Clade: Pseudosuchia
Clade: Crocodylomorpha
Suborder:† Thalattosuchia
Family:† Metriorhynchidae
Subfamily:† Geosaurinae
Genus:† Purranisaurus
Rusconi 1948 [1]
Species
  • P. potensRusconi 1948 (type)

Purranisaurus is an extinct genus of marine crocodyliform from the Late Jurassic aged Vaca Muerta of Argentina. [2] Rusconi originally regarded Purranisaurus potens (the type species) to be a plesiosaur; [1] however, Gasparini demonstrated that it was in fact a metriorhynchid crocodyliform, and that may be a junior synonym of Metriorhynchus . [3] It was about 3.3 m (11 ft) long. [4]

Taxonomy and phylogeny

Restoration of 'Metriorhynchus' casamiquelai, which was at one point assigned to Purranisaurus Suchodus BW.jpg
Restoration of 'Metriorhynchus' casamiquelai, which was at one point assigned to Purranisaurus

In the 2000s phylogenetic analysis has shown that Purranisaurus is a distinct metriorhynchid genus. [5] [6] A subsequent study expanded the genus Purranisaurus to include Metriorhynchus casamiquelai and M. westermanni. [7] Following the re-description of the holotype of the type species, only that species is now referred to Purranisaurus. [2]

References

  1. 1 2 Rusconi C. 1948. Nuevo plesiosaurio, pez y langostas del mar jurasico de Mendoza. Mendoza, Mus. Hist. Nat., Rev.2: 3–12.
  2. 1 2 Herrera Y, Gasparini Z, Fernandez MS (2015). "Purranisaurus potens Rusconi, an enigmatic metriorhynchid from the Late Jurassic–Early Cretaceous of the Neuquén Basin". Journal of Vertebrate Paleontology. 35 (2) e904790. Bibcode:2015JVPal..35E4790H. doi:10.1080/02724634.2014.904790. hdl: 11336/13737 . S2CID   128937976.
  3. ↑ Gasparini Z. 1975. Revisión de ?Purranisaurus potens Rusconi, 1948 (Crocodilia, Thalattosuchia) Los Thalattosuchia como un nuevo Infraorden de los Crocodilia. Actas del Congreso Geologico Argentino5: 423–431.
  4. ↑ Young, M.T.; Bell, M.A.; de Andrade, M.B.; Brusatte, S.L. (2011). "Body size estimation and evolution in metriorhynchid crocodylomorphs: implications for species diversification and niche partitioning". Zoological Journal of the Linnean Society. 163 (4): 1199–1216. doi: 10.1111/j.1096-3642.2011.00734.x .
  5. ↑ Young MT. 2007. The evolution and interrelationships of Metriorhynchidae (Crocodyliformes, Thalattosuchia). Journal of Vertebrate Paleontology27 (3): 170A.
  6. ↑ Young, Mark T., and Marco Brandalise de Andrade, 2009. "What is Geosaurus? Redescription of Geosaurus giganteus (Thalattosuchia: Metriorhynchidae) from the Upper Jurassic of Bayern, Germany." Zoological Journal of the Linnean Society, 157: 551-585.
  7. ↑ Young, Mark T., Brusatte, Stephen L., Ruta, M., Andrade, Marco B. 2009. "The evolution of Metriorhynchoidea (Mesoeucrocodylia, Thalattosuchia): an integrated approach using geometrics morphometrics, analysis of disparity and biomechanics". Zoological Journal of the Linnean Society158: 801-859.


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