Palaeagama

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Palaeagama Temporal range: Late Permian?-Early Triassic? PreꞒ Ꞓ O S D C P T J K Pg N

Life Restoration
Scientific classification
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

[edit]

^ ^a ^b 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.
^ ^a ^b Carroll, Robert L. (1975). "Permo-Triassic 'lizards' from the Karroo". Palaeontologia Africana. 18: 71–87.
^ ^a ^b 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.
^ 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.
^ 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.
^ 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.

Sauropsida (Reptilia sensu lato)

Kingdom: Animalia
Phylum: Chordata
Superclass: Tetrapoda
Clade: Amniota

Tetrapodomorpha

- see Tetrapodomorpha

Reptiliomorpha

see Reptiliomorpha
Sauropsida	see below↓

Sauropsida

†Australothyris †Erpetonyx †Microleter
†Acleistorhinidae	Acleistorhinus Carbonodraco Colobomycter Delorhynchus Feeserpeton Karutia Klastomycter
†Bolosauridae	Belebey Bolosaurus Eudibamus
†Mesosauria	Brazilosaurus Mesosaurus Stereosternum
†Millerettidae	Broomia Heleophilus Milleretta Millerosaurus Milleropsis Nanomilleretta
†Procolophonia	see Procolophonia
Diapsida	see below↓

†Younginidae

- see Choristodera

†Ichthyosauromorpha

- see Ichthyosauromorpha

†Sauropterygia

- see Sauropterygia

†Thalattosauria

- see Thalattosauria

Sauria
(Crown-Reptilia)

Lepidosauromorpha

- see Lepidosauromorpha
Includes Lepidosauria
- includes rhynchocephalians and squamates

Archelosauria

Archosauromorpha	see Archosauromorpha Includes Archosauria includes birds and crocodilians
Pantestudines	see Pantestudines Includes Testudines turtles

See also

Possible sauropsids	Araeoscelidia Captorhinidae Protorothyrididae Recumbirostra Varanopidae
Other taxa	Anapsida Captorhinida Eureptilia Parareptilia Lanthanosuchoidea Millerosauria Procolophonomorpha Ankyramorpha Neodiapsida Eosuchia Younginiformes Avicephala Eolacertilia Euryapsida

Category

Lepidosauromorpha

Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Subclass: Diapsida
Clade: Sauria

Sauropsida

see Sauropsida
Lepidosauromorpha	see below↓

Lepidosauromorpha

Lepidosauromorpha

†Sauropterygia?

- see Sauropterygia

Lepidosauria

Rhynchocephalia

- see Rhynchocephalia
- includes tuatara

Pan-Squamata

†Ardeosaurus †Bavarisaurus †Bellairsia †Dalinghosaurus †Eichstaettisaurus †Gephyrosaurus? †Hongshanxi †Hoyalacerta †Huehuecuetzpalli †Kuroyuriella †Marmoretta? †Megachirella? †Meyasaurus †Oculudentavis †Palaeagama? †Sakurasaurus †Scandensia †Sophineta? †Tamaulipasaurus? †Yabeinosaurus
Crown-Squamata	see Squamata includes lizards and snakes

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