A new species of Cyclotosaurus (Stereospondyli, Capitosauria) from the Late Triassic of Bielefeld, NW Germany, and the intrarelationships of the genus Author Witzmann, Florian Sven Sachs & Department of Ecology and Evolutionary Biology, Brown University, Providence, G-B 204, RI 02912, USA & Sven Sachs & Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Author Sachs, Sven Christian J. Nyhuis & Naturkundemuseum Bielefeld, Abteilung Geowissenschaften, Adenauerplatz 2, 33602 Bielefeld, Germany Author Nyhuis, Christian J. Galileo-Wissenswelt, Mummendorferweg 11 b, 23769 Burg auf Fehmarn, Germany text Fossil Record 2016 2016-03-23 19 2 83 100 http://dx.doi.org/10.5194/fr-19-83-2016 journal article 298392 10.5194/fr-19-83-2016 d35144e8-965a-4024-881a-ea00ef40c573 2193-0074 11589242 076EFB19-198E-4A0C-B399-A99643EF5A11 Cyclotosaurus Fraas, 1889 Hercynosaurus Jaekel, 1914 Hemprichisaurus Kuhn, 1939 Type species: Cyclotosaurus robustus ( Meyer and Plieninger, 1844 ) Diagnosis (emended after Schoch and Milner, 2000 ): (1) Frontals with broad descending processes that connect with the roof of the broad sphenethmoid; (2) short choana of round to ovate outline; (3) vomerine plate short; (4) broad triangular area at the base of the cultriform process merging continuously into the cultriform crest; (5) basal plate of parasphenoid delta shaped with elongated basicranial suture (shared with Mastodonsauridae ); (6) squamosal embayment closed to otic fenestra (shared with Eocyclotosaurus , Quasicyclotosaurus , Kupferzellia ( Tatrasuchus ) , and Procyclotosaurus ); (7) pterygoid–exoccipital contact by means of posterior process of pterygoid (shared with Eocyclotosaurus and Quasicyclotosaurus ); (8) frontal contribution to orbital margin limited or obliterated (obliteration shared with Eocyclotosaurus and Quasicyclotosaurus ); (9) quadrate ramus of pterygoid laterally aligned and abbreviated ( Schoch, 2008 ; shared with Mastodonsauridae ).