Vertebrata - Cotylosauria

Synonyms: Datheosaurus macrourus Schroeder 1905, Haptodus longicaudatus Credner 1888, Haptodus macrourus Schroeder 1905, Haptodus saxonicus v. Huene 1925, Palaeohatteria longicaudata Credner 1888, Pantelosaurus saxonicus v. Huene 1925

Belongs to Haptodus according to R. R. Reisz 1986

Sister taxa: Haptodus garnettensis, Haptodus grandis

Type specimens:

• Haptodus baylei: a specimen in the Muséum National d'Histoire Naturelle Paris. Its type locality is Les Télots, which is in an Autunian terrestrial horizon in France.
• Datheosaurus macrourus: MB. R. 1015.1-2 (part and counterpart), a skeleton. Its type locality is Nowa Ruda, which is in a Kuzel fluvial-lacustrine sandstone in the Ludwikowice Formation of Poland.
• Palaeohatteria longicaudata: Its type locality is Niederhäslich, which is in a Sakmarian lacustrine limestone in the Niederhäslich-Schweinsdorf Formation of Germany.
• Pantelosaurus saxonicus: Its type locality is Königin-Carola-Schacht, which is in an Asselian fine channel fill shale in the Döhlen Formation of Germany.

Ecology: