This article relies largely or entirely on a single source. (March 2016)
Discovery and historyEdit
It was originally described in 1904 on a basis of a specimen from late Carboniferous deposits in Poland. It was later considered a synonym of Haptodus by several authors, but subsequent examination has found it be a caseid rather a sphenacodont. This was confirmed by cladistic analysis, which recovered Datheosaurus as a basal caseid 
- Frederik Spindler; Jocelyn Falconnet & Jörg Fröbisch (2015). "Callibrachion and Datheosaurus, two historical and previously mistaken basal caseasaurian synapsids from Europe". Acta Palaeontologica Polonica. 61. doi:10.4202/app.00221.2015.
- Neil Brocklehurst; Robert Reisz; Vincent Fernandez & Jörg Fröbisch (2016). "A Re-Description of 'Mycterosaurus' smithae, an Early Permian Eothyridid, and Its Impact on the Phylogeny of Pelycosaurian-Grade Synapsids". PLoS ONE. 11: e0156810. doi:10.1371/journal.pone.0156810. PMC 4917111. PMID 27333277.
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