Younginiformes

Younginiformes; Temporal range: Middle Permian–Early Triassic PreꞒ Ꞓ O S D C P T J K Pg N
	Skull of Youngina
	Life restoration of Youngina
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Neodiapsida
Order:	†Younginiformes; Romer, 1945
Families
	†Tangasauridae Haughton, 1924; †Younginidae Broom, 1914;

Younginiformes is a group of diapsid reptiles known from the Permian-Triassic of Africa and Madagascar. It has been used as a replacement for "Eosuchia".^[1] Younginiformes (including Acerosodontosaurus, Hovasaurus, Kenyasaurus, Tangasaurus, Thadeosaurus and Youngina) were historically suggested to be lepidosauromorphs, but are currently thought to be basal non-saurian neodiapsids.^[2]^[3] The group is sometimes divided into two families, Tangasauridae and Younginidae. The monophyly of the group is disputed. A 2009 study found them to be an unresolved polytomy at the base of Neodiapsida,^[4] while a 2011 study recovered the group as paraphyletic.^[5] A 2022 study recovered the Younginiformes as a monophyletic group of basal neodiapsid reptiles, also including Claudiosaurus and Saurosternon as part of the group.^[6] Some younginiforms like Hovasaurus and Acerosodontosaurus are thought to have had an amphibious lifestyle, while others like Kenyasaurus, Thadeosaurus and Youngina were probably terrestrial.^[4]

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Younginiformes

Classification

References

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