Mochlodon - Video Learning - WizScience.com
""Mochlodon"" is a genus of iguanodont dinosaurs from the
Late Cretaceous.
In 1859 coal mine administrator Pawlowitsch notified the
University of Vienna that some fossils had been found in the "
Gute Hoffnung" mine at Muthmannsdorf in
Austria.
A team headed by geologists
Eduard Suess and
Ferdinand Stoliczka subsequently uncovered numerous bones of several species, among them those of a euornithopod dinosaur. Stored at the university museum, the finds remained undescribed until they were studied by
Emanuel Bunzel from
1870 onwards. Bunzel in
1871 named the euornithopod a new species of "Iguanodon": "Iguanodon suessii". The specific name honours Suess and is today more often spelled "suessi". In 1881
Harry Govier Seeley named a separate genus: "Mochlodon". The generic name is derived from
Greek "mokhlos", "bar", and "odon", "tooth", a reference to the bar-like median ridge on the teeth. The type species is "Mochlodon suessi". "Mochlodon" and "Struthiosaurus", the latter found at the same site, are the only dinosaur genera named from
Austrian finds.
The type specimen PIUW
2349 was found in the Coal-Bearing
Complex Formation of the
Gosau Group dating from the Lower Campanian, about eighty million years old. It consists of a dentary, two vertebrae , a parietal, a scapula, an ulna, a manual ungual, a femur and a tibia. Bunzel did not assign a holotype. In
2005 the dentary was chosen as the lectotype.
At the end of the nineteenth century
Baron Franz Nopcsa noted the similarity of fossils found in
Romania to both the
French "Rhabdodon" and the Austrian "Mochlodon". In 1899 he named some of these "Mochlodon inkeyi", the specific name honouring
Béla Inkey, but the same year changed the name into "Rhabdodon inkeyi". In
1900 Nopcsa named some
Romanian remains "Mochlodon robustum" . In
1915 however, he concluded that all this material could be referred to "Rhabdodon", the Austrian remains to "
Rhabdodon priscus". In later years, "Mochlodon" was often considered a "nomen dubium". In
2003, when "
M. robustus" was renamed "Zalmoxes", "Mochlodon" was tentatively reinstated as a separate genus for the species "Mochlodon suessi". In 2005 a study concluded that no unique derived features, autapomorphies, could be established for "Mochlodon" in relation to "Zalmoxes", assigning the Austrian remains provisionally to a "Zalmoxes" sp.; a definite identification would give "Mochlodon" nomenclatural priority.
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