Mesosaurs ("middle lizards") were a group of small aquatic reptiles that lived during the early Permian period (Cisuralian), roughly 299 to 270 million...

6(2):169-175 Piñeiro, G.; Ferigolo, J.; Mones, A.; Núñez Demarco, P. (2021). "Mesosaur taxonomy reappraisal: are Stereosternum and Brazilosaurus valid taxa?"...

Laurin, M. (2012). "Unusual Environmental Conditions Preserve a Permian Mesosaur-Bearing Konservat-Lagerstätte from Uruguay". Acta Palaeontologica Polonica...

within Diapsida as the sister group to Neodiapsida. However, this excludes mesosaurs, who were found to be basal among the sauropsids. Below is a cladogram...

restricted crown group encompassing diapsids and parareptiles (apart from mesosaurs, which he considered to be the most basal branch of sauropsids). Sauropsida...

reptiles. These include the first reptiles to return to marine ecosystems (mesosaurs), the first bipedal reptiles (bolosaurids such as Eudibamus), the first...

bolosaurids, some nycteroleterids, some procolophonoids and at least some mesosaurs made it more ambiguous and it's currently uncertain whether the ancestral...

are known for their unusual downturned snouts and crushing dentition. Mesosaurs were quite possibly the first fully aquatic reptilian animals and the...

Laurin, M. (2012). "Unusual Environmental Conditions Preserve a Permian Mesosaur-Bearing Konservat-Lagerstätte from Uruguay". Acta Palaeontologica Polonica...

Following is a list of marine reptiles, reptiles which are adapted to life in marine or brackish environments. The following marine reptiles are species...

fully adapted animals may take to mating and birthing in water or ice. Mesosaurs were a group of small aquatic reptiles that lived during the early Permian...

extinct genus of mesosaur marine reptile from the Early Permian of Brazil and also the Great Karoo Basin of South Africa. The taxon mesosaur is a monophyletic...

Graciela H. (2017-11-02). "A Reassessment of the Taxonomic Position of Mesosaurs, and a Surprising Phylogeny of Early Amniotes". Frontiers in Earth Science...

the globe, the geographic distribution of some fossils (including the mesosaurs) on various continents, and the jigsaw puzzle shape of the landmasses...

araeoscelidans, mesosaurs, squamates, pleurosaurids, weigeltisaurids, protorosaurs, and trilophosaurs. With the exception of mesosaurs, which only have...

Jörg (2018). "Commentary: A Reassessment of the Taxonomic Position of Mesosaurs, and a Surprising Phylogeny of Early Amniotes". Frontiers in Earth Science...

Brazilosaurus is an extinct genus of mesosaur which lived during the early Permian (Artinskian stage) of what is now Brazil. It is known from specimen...

the Triassic. A study on the microanatomy and replacement of teeth in mesosaurs is published by Carlisbino et al. (2024). New information on the anatomy...

Friedrich von Huene in 1931. Brasileosaurus is not to be confused with the mesosaur Brazilosaurus. Although originally classified as a coelurosaur in the original...

bolosaurids, some nycteroleterids, some procolophonoids and at least some mesosaurs made it more ambiguous and it is currently uncertain whether the ancestral...

Name Novelty Status Authors Age Unit Location Notes Images Brazilosaurus Gen. et sp. Valid Shikama & Ozaki Artinskian Irati Formation  Brazil A mesosaur....

bolosaurids, some nycteroleterids, some procolophonoids and at least some mesosaurs. The presence of temporal openings in the skulls of these taxa makes it...

1908. The formation is particularly famous for the occurrences of the mesosaurs Mesosaurus tenuidiens, and Stereosternum tumidum. Other fossils found...

Olson also included distantly related groups such as protorosaurs and mesosaurs. New specimens have been discovered in the United States state of Oklahoma...

Jörg (2018). "Commentary: A Reassessment of the Taxonomic Position of Mesosaurs, and a Surprising Phylogeny of Early Amniotes". Frontiers in Earth Science...

retraction of the external nares (unlike other reptilian groups such as mesosaurs, phytosaurs, thalattosaurians, saurosphargids, ichthyosauriforms, sauropterygians...

correlated formations of Irati and Whitehill, it is known for its abundant mesosaur fossils. It also contains the oldest known Konservat-Lagerstätte in South...

of secondarily marine animals like whales, ichthyosaurs, plesiosaurs, mesosaurs and the Jurassic metriorhynchoids, distant cousins of crocodilians. However...

Brasileiro: Plácido de Castro (in Portuguese), Folha de S. Paulo: Enciclopédia Mirador Internacional, retrieved 2016-07-04 Stereospondyls Mesosaurs v t e...

Laurin, M. (2012). "Unusual environmental conditions preserve a Permian mesosaur-bearing Konservat-Lagerstätte from Uruguay". Acta Palaeontologica Polonica...