Sclerosaurus is an extinct genus of procolophonid parareptile known from the Early to Middle Triassic of Germany and Switzerland. It contains a single species, Sclerosaurus armatus. It was fairly small, about 30 cm long, distinguished from other known parareptiles by the possession of long, backwardly projecting spikes, rear lower jaw teeth with slightly imbricating crowns, and a narrow band of back armor comprising two or three rows of sculptured osteoderms on either side of the midline.[1]
Traditional classifications, e.g. Carroll (1988) placed Sclerosaurus with the procolophonids, however some phylogenetic studies have found it to be a close relative of the pareiasaurs, and together with that group it forms the clade Pareiasauroidea.[2] More recent phylogenetic analyses place Sclerosaurus within Procolophonidae as originally suggested, and support its referral to the Leptopleuroninae. Sclerosaurus is most closely related to Scoloparia glyphanodon from Nova Scotia, Canada, and together they form the Sclerosaurini tribe within Leptopleuroninae.[3][1]
^ abHans-Dieter Sues and Robert R. Reisz (2008). "Anatomy and Phylogenetic Relationships of Sclerosaurus armatus (Amniota: Parareptilia) from the Buntsandstein (Triassic) of Europe". Journal of Vertebrate Paleontology. 28 (4): 1031–1042. doi:10.1671/0272-4634-28.4.1031. S2CID 53967912.
^Jalil, N. E., & Janvier, P. (2005). Les pareiasaures (Amniota, Parareptilia) du Permien supérieur du Bassin d’Argana, Maroc. Geodiversitas, 27(1), 35-132.
^Cisneros, J. C. (2008). "Phylogenetic relationships of procolophonid parareptiles with remarks on their geological record". Journal of Systematic Palaeontology. 6 (3): 345–366. doi:10.1017/S1477201907002350. S2CID 84468714.
analyses place Sclerosaurus within Procolophonidae as originally suggested, and support its referral to the Leptopleuroninae. Sclerosaurus is most closely...
as Eocyclotosaurus, and reptiles including Amotosaurus Cymatosaurus, Sclerosaurus, and ctenosauriscids. Sues, Hans-Dieter; Spiekman, Stephan N. F.; Schoch...
centimeters. The formation has provided fossils of: Basileosaurus freyi Sclerosaurus armatus List of dinosaur-bearing rock formations List of stratigraphic...
and Robert R. Reisz (2008). "Anatomy and Phylogenetic Relationships of Sclerosaurus armatus (Amniota: Parareptilia) from the Buntsandstein (Triassic) of...
was used by Lee (1995) for Pareiasauridae + Sclerosaurus. More recent cladistic studies place Sclerosaurus in the procolophonid subfamily Leptopleuroninae...
Procolophonoidea includes the families Owenettidae and Procolophonidae. Sclerosaurus, which is placed within its own family Sclerosauridae, may be a member...
common ancestor of lanthanosuchids and "pareiasauroids" (pareiasaurs + Sclerosaurus), and all its descendants. Unlike Ankyramorpha, which explicitly included...
3–201.3 Ma PreꞒ Ꞓ O S D C P T J K Pg N Pareiasaurus (Pareiasauromorpha) Sclerosaurus (Procolophonoidea) Scientific classification Domain: Eukaryota Kingdom:...
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