Clovesuurdameredeor (meaning "sea creature of Closworth"; from the Medieval Latin Clovesuurda and the Old English meredeor) is an extinct genus of machimosaurid teleosauroid from the Bathonian Cornbrash Formation of England.

[1] The type species, C. stephani, was originally named "Steneosaurus" stephani by Hulke in 1867.

[2] Vignaud (1995) considered S. stephani to be a minor synonym of Yvridiosuchus boutilieri (then still in the genus Steneosaurus),[3] but Johnson (2019) and Johnson et al. (2020) discovered that S. stephani was a basal machimosaur that was separate from Yvridiosuchus, erecting the genus Clovesuurdameredeor for this.

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