| Plagiosaurus Temporal range: Triassic
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Order: | †Temnospondyli |
| Suborder: | †Stereospondyli |
| Family: | †Plagiosauridae |
| Genus: | †Plagiosaurus Jaekel, 1914 |
| Type species | |
| †Plagiosaurus depressus Jaekel, 1914
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Plagiosaurus is an extinct genus of temnospondyl amphibian. The type and only species is P. depressus, first described by Otto Jaekel in 1914.[1] Arthur Smith Woodward regarded the genus as a synonym of Plagiosternum, but most researchers consider it to be valid.[2] It was paedomorphic, retaining the larval gills in adulthood. Like many stereospondyls, it had weak simplified vertebrae, consisting of large intercentra and neural arches, which is known as the stereospondylous condition.
- ^ Witzmann, F.; Schoch, R. R. (2024). "Osteology and phylogenetic position of Plagiosaurus depressus (Temnospondyli: Plagiosauridae) from the Late Triassic of Germany and the repeated loss of dermal bones in plagiosaurids". Zoological Journal of the Linnean Society. doi:10.1093/zoolinnean/zlae014.
- ^ Transactions of the American Philosophical Society. Vol. 35. American Philosophical Society. 1946. p. 395. ISBN 978-1-4223-7723-9.