Biology:Palaeagama

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Short description: Extinct genus of reptiles


Palaeagama
Temporal range: Late Permian?-Early Triassic?
Scientific classification e
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Neodiapsida
Genus: Palaeagama
Broom, 1926
Type species
Palaeagama vielhaueri
Broom, 1926

Palaeagama is an extinct genus of neodiapsid reptile from the Late Permian or Early Triassic of South Africa .[1] It is based on an articulated skeleton which was probably found in the Early Triassic Lystrosaurus Assemblage Zone, or potentially the Late Permian Daptocephalus Assemblage Zone.[2] Despite the completeness of the specimen, Palaeagama is considered as a "wildcard" taxon of uncertain affinities due to poor preservation.[3] It was originally considered an "eosuchian" (ancestral to modern reptiles),[4] and later reinterpreted as a lizard ancestor closely related to Paliguana and Saurosternon.[2] Modern studies generally consider it an indeterminate neodiapsid,[1][3] though a few phylogenetic analyses tentatively support a position at the base of Lepidosauromorpha.[5][6]

References

  1. 1.0 1.1 Ford, David P.; Evans, Susan E.; Choiniere, Jonah N.; Fernandez, Vincent; Benson, Roger B. J. (2021-08-25). "A reassessment of the enigmatic diapsid Paliguana whitei and the early history of Lepidosauromorpha". Proceedings of the Royal Society B: Biological Sciences 288 (1957): 20211084. doi:10.1098/rspb.2021.1084. PMID 34428965. 
  2. 2.0 2.1 Carroll, Robert L. (1975). "Permo-Triassic 'lizards' from the Karroo". Palaeontologia Africana 18: 71–87. 
  3. 3.0 3.1 Ezcurra, Martín D.; Scheyer, Torsten M.; Butler, Richard J. (2014-02-27). "The Origin and Early Evolution of Sauria: Reassessing the Permian Saurian Fossil Record and the Timing of the Crocodile-Lizard Divergence" (in en). PLOS ONE 9 (2): e89165. doi:10.1371/journal.pone.0089165. ISSN 1932-6203. PMID 24586565. Bibcode2014PLoSO...989165E. 
  4. Broom, R. (1926). "On a nearly complete Skeleton of a new Eosuchian Reptile (Palæagama veilhaueri , gen. et sp. nov.)" (in en). Proceedings of the Zoological Society of London 96 (2): 487–491. doi:10.1111/j.1469-7998.1926.tb08109.x. ISSN 0370-2774. https://onlinelibrary.wiley.com/doi/10.1111/j.1469-7998.1926.tb08109.x. 
  5. Simões, Tiago R.; Caldwell, Michael W.; Tałanda, Mateusz; Bernardi, Massimo; Palci, Alessandro; Vernygora, Oksana; Bernardini, Federico; Mancini, Lucia et al. (2018). "The origin of squamates revealed by a Middle Triassic lizard from the Italian Alps" (in en). Nature 557 (7707): 706–709. doi:10.1038/s41586-018-0093-3. ISSN 1476-4687. PMID 29849156. Bibcode2018Natur.557..706S. https://www.nature.com/articles/s41586-018-0093-3. 
  6. Sobral, Gabriela; Simões, Tiago R.; Schoch, Rainer R. (2020-02-20). "A tiny new Middle Triassic stem-lepidosauromorph from Germany: implications for the early evolution of lepidosauromorphs and the Vellberg fauna" (in en). Scientific Reports 10 (1): 2273. doi:10.1038/s41598-020-58883-x. ISSN 2045-2322. PMID 32080209. Bibcode2020NatSR..10.2273S. 

Wikidata ☰ Q112182579 entry