Pseudolagosuchus

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Pseudolagosuchus
Temporal range: Middle Triassic
~236–234 Ma
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauromorpha
Clade: Dinosauriformes
Genus: Pseudolagosuchus
Arcucci 1987
Species: P. major
Binomial name
Pseudolagosuchus major
Arcucci 1987

Pseudolagosuchus (meaning "false Lagosuchus") is a genus of dinosauromorph from the Middle Triassic (Ladinian) Chañares Formation of Argentina. It may be a junior synonym of Lewisuchus, but there is very little overlapping material. It was a small reptile which was probably about 1 meter (3.3 ft) long, 30 centimeters (1 ft) tall, and weighed approximately 2 kilograms (4.4 lb). It is known only from a pubis, a femur, a tibia, and vertebrae. Both Sterling Nesbitt, Christian Sidor et al. (2010) and Matthew Baron, David Norman and Paul Barrett (2017) treated this taxon as being synonymous with Lewisuchus.[1][2]

Cladogram

Cladogram according to the analysis of Ezcurra, 2006.[3]

Ornithodira
Pterosauromorpha

Pterosauria

Dinosauromorpha

Lagerpeton

Dinosauriformes

Marasuchus

Pseudolagosuchus

Silesaurus

Eucoelophysis

Dinosauria
Saurischia

Herrerasauridae

Eusaurischia

Theropoda

Sauropodomorpha

Ornithischia

References

  1. ^ Nesbitt, Sterling J., Sidor, Christian A., Irmis, Randall B., Angielczyk, Kenneth D., Smith, Roger M.H. and Tsuji, Linda A. (2010) "Ecologically distinct dinosaurian sister group shows early diversification of Ornithodira." Nature 464(7285):95-8 Supplement
  2. ^ Baron, M.G., Norman, D.B., and Barrett, P.M. (2017). A new hypothesis of dinosaur relationships and early dinosaur evolution. Nature, 543: 501–506. doi:10.1038/nature21700
  3. ^ Ezcurra, M. D. (2006). "A review of the systematic position of the dinosauriform archosaur Eucoelophysis baldwini Sullivan & Lucas, 1999 from the Upper Triassic of New Mexico, USA" (PDF). Geodiversitas. 28 (4). pp. 649–684.


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