Name: Tanius
(After the palaeontologist Tan Xichou).
Phonetic: Tan-e-us.
Named By: Carl Wiman - 1929.
Classification: Chordata, Reptilia, Dinosauria,
Ornithischia, Ornithopoda, Hadrosauroidea, Hadrosauridae?
Species: T. sinensis (type).
Diet: Herbivore.
Size: Estimated at around 7 meters long.
Known locations: China, Shandong Province.
Time period: Campanian of the Cretaceous.
Fossil representation: Initially the back of the
skull, further remains have been attributed to the genus.
Tanius
is one of the many known Asian hadrosauroid dinosaurs, but one that
is not very well represented. The initial description was based upon
the back of the skull which seems to be that of a flat headed
hadrosauroid dinosaur, the kind roughly between the earlier
iguanodonts and the more advanced hadrosaurids. However the
incomplete nature of the remains has also led to speculation that
Tanius may actually be a hadrosaurid in its own
right, possibly one
of the saurolophines because of the seemingly flat head.
At
one time the lambeosaurine hadrosaurid
Tsintaosaurus
was considered by
some to be a synonym to the genus Tanius. This
was based upon the
idea the crest of Tsintaosaurus was merely another
bone that had become
fossilised next to the skull to give the impression of a crest.
However, when a second specimen identical to the first was found,
the crest was definitely not a product of the fossilisation, and
palaeontologists are today satisfied with treating the two genera as
separate. Additionally however, another species of Tanius
called
T. spinorhinus is now considered a synonym of Tsintaosaurus,
with
the other species T. chingkankouensis and T.
laiyangensis also
being considered to be the same as Tsintaosaurus.
Another species,
T. prynadai, has now been moved to the genus Bactrosaurus.
Further reading
Tsintaosaurus spinorhinus Young and Tanius
sinensis Wiman: a
preliminary comparative study of two hadrosaurs (Dinosauria) from
the Upper Cretaceous of China, E. Buffetaut & H. Tong
- 1993.
- Review of historical and current research on the Late Cretaceous
dinosaurs and dinosaur eggs from Laiyang, Shandong. - Vertebrata
PalAsiatica. 55 (2): 187–200. - J. L. Zhang, Q. Wang, S. X. Jiang, X.
Cheng, N. Li, R. Qiu, X. J. Zhang & X. L. Wang - 2017.
- Osteological re‐assessment and taxonomic tevision of ‘Tanius
laiyangensis’ (Ornithischia: Hadrosauroidea) from the Upper
Cretaceous
of Shandong, China. - The Anatomical Record. - Yu-Guang Zhang, Ke-Bai
Wang, Shu-Qing Chen, Liu Di & hai Xing - 2019.