Palaeagama

Palaeagama
Temporal range: Late Permian or Early Triassic
Life restoration
Scientific classification Edit this classification
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. It is known from much of an articulated skeleton. The exact age of Palaeagama is unclear; it was described in 1926 as having been found in rock layers associated with the Late Permian Cistecephalus Assemblage Zone, while a 1975 revision preferred the Early Triassic Lystrosaurus Assemblage Zone for the specimen's origins, but did not rule out the end-Permian Daptocephalus Assemblage Zone. Despite the completeness of the specimen, Palaeagama is considered as a "wildcard" taxon of uncertain affinities due to poor preservation. It was originally considered an "eosuchian" (ancestral to modern reptiles), and later reinterpreted as a lizard ancestor closely related to Paliguana and Saurosternon. Modern studies generally consider it an indeterminate neodiapsid, though a few phylogenetic analyses tentatively support a position at the base of Lepidosauromorpha.

References

  1. 1 2 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. PMC 8385343. PMID 34428965.
  2. 1 2 Carroll, Robert L. (1975). "Permo-Triassic 'lizards' from the Karroo". Palaeontologia Africana. 18: 71–87.
  3. ↑ Buffa, Valentin; Jalil, Nour‐Eddine; Falconnet, Jocelyn; Vincent, Peggy (2025-03-23). "The neodiapsid Thadeosaurus colcanapi from the upper Permian of Madagascar". Papers in Palaeontology. 11 (2). doi:10.1002/spp2.70008. ISSN 2056-2799.
  4. 1 2 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". PLOS ONE. 9 (2) e89165. Bibcode:2014PLoSO...989165E. doi:10.1371/journal.pone.0089165. ISSN 1932-6203. PMC 3937355. PMID 24586565.
  5. ↑ Broom, R. (1926). "On a nearly complete Skeleton of a new Eosuchian Reptile (Palæagama veilhaueri, gen. et sp. nov.)". Proceedings of the Zoological Society of London. 96 (2): 487–491. doi:10.1111/j.1469-7998.1926.tb08109.x. ISSN 0370-2774.
  6. ↑ Simões, Tiago R.; Caldwell, Michael W.; Tałanda, Mateusz; Bernardi, Massimo; Palci, Alessandro; Vernygora, Oksana; Bernardini, Federico; Mancini, Lucia; Nydam, Randall L. (2018). "The origin of squamates revealed by a Middle Triassic lizard from the Italian Alps". Nature. 557 (7707): 706–709. Bibcode:2018Natur.557..706S. doi:10.1038/s41586-018-0093-3. ISSN 1476-4687. PMID 29849156. S2CID 44108416.
  7. ↑ 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". Scientific Reports. 10 (1): 2273. Bibcode:2020NatSR..10.2273S. doi:10.1038/s41598-020-58883-x. ISSN 2045-2322. PMC 7033234. PMID 32080209.