Open Paleo

Kundurosaurus

Godefroit et al., 2012 kun-DUH-ro-SOR-us Disputed

Named for Kundur, the type locality in Amur Region, Far Eastern Russia, combined with Ancient Greek 'sauros' meaning 'lizard'; the specific name nagornyi honors V.A. Nagorny, who discovered the Kundur locality in 1990.

72.2–66.0 million years ago Maastrichtian, Late Cretaceous
Late Cretaceous stages

Kundurosaurus is an extinct genus of saurolophine hadrosaurid dinosaur known from the latest Cretaceous (probably late Maastrichtian stage) of Amur Region, Far Eastern Russia. It contains a single species, Kundurosaurus nagornyi.

Under dispute

Kundurosaurus nagornyi is widely treated as a junior synonym of Kerberosaurus manakini (Xing and colleagues, 2014), with which it overlaps in age and locality, though its describers retained it as distinct. Kept valid within Saurolophinae pending consensus.

Diagnosis

  1. Prominent and thick ridge on lateral side of nasal bordering circumnasal depression, invading caudal plate
  2. Caudal buttress of proximal scapular head oriented laterally, parallel to pseudoacromial process
  3. Preacetabular iliac process straight, moderately deflected ventrally (160° angle), not reaching peduncle plane
  4. Postacetabular process strongly twisted, lateral side progressively facing dorsolaterally

Species

Kundurosaurus nagornyi Godefroit et al., 2012 Disputed

Type species

Named for V.A. Nagorny of the Far Eastern Institute of Mineral Resources, who discovered the Kundur fossil locality in 1990.

Holotype
AENM 2/921 , Amur Natural History Museum of the Institute of Geology and Nature Management, Russian Academy of Sciences
Material
Partial, disarticulated skull.
Horizon
Udurchukan Formation, Maastrichtian, Late Cretaceous , 72.2–66.0 million years ago
Locality
Kundur, Amur, Russia

References

  1. Godefroit, P.; Bolotsky, Y. L.; Lauters, P. (2012). A New Saurolophine Dinosaur from the Latest Cretaceous of Far Eastern Russia. PLoS ONE 7(5): e36849. Public Library of Science (PLoS). doi:10.1371/journal.pone.0036849 godefroit2012b
  2. Kobayashi, Y.; Nishimura, T.; Takasaki, R.; Chiba, K.; Fiorillo, A. R.; Tanaka, K.; Chinzorig, T.; Sato, T.; Sakurai, K. (2019). A New Hadrosaurine (Dinosauria: Hadrosauridae) from the Marine Deposits of the Late Cretaceous Hakobuchi Formation, Yezo Group, Japan. Scientific Reports 9(1). Springer Science and Business Media LLC. doi:10.1038/s41598-019-48607-1

    Recovered Kerberosaurus (Kundurosaurus's sister taxon) within Edmontosaurini; does not analyze Kundurosaurus directly.

    kobayashi2019a
  3. Xing, H.; Zhao, X.; Wang, K.; Li, D.; Chen, S.; Mallon, J. C.; Zhang, Y.; Xu, X. (2014). Comparative osteology and phylogenetic relationship of Edmontosaurus and Shantungosaurus (Dinosauria: Hadrosauridae) from the Upper Cretaceous of North America and East Asia. Acta Geologica Sinica (English Edition) 88(6): 1623-1652. doi:10.1111/1755-6724.12334

    Treated Kundurosaurus nagornyi as a junior synonym of Kerberosaurus manakini, citing co-occurrence and shared cranial characters; its describers retained it as distinct.

    xing2014b