Younginiformes is a group of diapsid reptiles known from the Permian-Triassic of Africa and Madagascar.

[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.

[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] Included genera: 2011 phylogeny showing a paraphyletic Younginiformes:[5] Orovenator Lanthanolania Tangasaurus Acerosodontosaurus Hovasaurus Thadeosaurus Youngina Claudiosaurus Sauria Phylogeny of Younginiformes from Simões et al. 2022:[6] "Parareptilia" (paraphyletic) Claudiosaurus germaini Youngina capensis Hovasaurus boulei Acerosodontosaurus piveteaui Saurosternon bainii Eunotosaurus Weigeltisauridae Archelosauria Lepidosauromorpha

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