Victoria. It is a little younger at 106 million years old, having been found in the Eumeralla Formation. The scientists who first studied the ulnae said that they most closely resembled those of Leptoceratops, but subsequent studies have shown that this interpretation is likely incorrect. In a comprehensive survey of the dinosaurs from Australia and New Zealand, Federico Angolin and colleagues in 2010 found that the ulna did not especially resemble that of a basal ceratopsian any more than of any other quadruped genasaurian ornithischian, lacking ceratopsian synapomorphies, and that in fact it was more generally similar to the ulna of the Australian ankylosaur Minmi. It could thus not be confidently referred to any ornithischian group, and should be considered a nomen dubium. However, in 2014 Rich et al. published a statistical study showing that the proportions of the holotype ulna fell within ceratopsian morphospace and found the taxon to be valid based on a unique combination of characters. Most recently, Rozadilla et al. in 2021 found that while the taxon was valid, the ulna of Serendipaceratops was deformed, making Rich et al's conclusions about its classification invalid. Instead, Rozadilla et al. classified Serendipaceratops as an ankylosaur, because of the ulna's robust proportions. References External links Geoscience Australia (Department of Australian Government) BBC article on 19 July 2005 Polar Dinos Spotlighted in "Dinosaurs of Darkness" Exhibition National Geographic Article Planet Dinosaur Dann's Dinosaur Info: Serendipaceratops Curiosities of Biological Nomenclature - Etymologies www.dinohunter.info Dinobase from PALAEONTOLOGY RESEARCH GROUP University Of Bristol Ornithischian genera Early Cretaceous dinosaurs of Australia Nomina dubia Fossil taxa described in 2003 Taxa named by Patricia Vickers-Rich Taxa named by Tom Rich Paleontology in Victoria