A partial skeleton and isolated humeri ofNothosaurus(Reptilia: Eosauropterygia) from Winterswijk, The Netherlands

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Abstract
A rare partial postcranium and isolated humeri of Nothosaurus from the Lower Muschelkalk of Winterswijk, The Netherlands are described. The partial skeleton consists of a vertebral column with ribs, pectoral girdle elements, and incomplete forelimbs. Because current species-level taxonomy of Nothosaurus is based only on features of the skull, we examined the postcranial morphology in detail in order to assign the skeleton to a valid species. We focused on the humerus because this bone generally shows a complex morphology in Lower Muschelkalk Nothosaurus. Three different humerus morphotypes were recognized in the Winterswijk material, which were also seen among humeri from other Lower and lowermost Middle Muschelkalk localities such as Rüdersdorf and Oberdorla (both in Germany), and Gogolin (Poland). Morphotype I is characterized by a slender appearance with a bulky proximal end. The preaxial and postaxial edges of the shaft are very distinct, and the distal end is fan-shaped. Morphotype II is rat...

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