Named By: C. Li, X. -C. Wu, L. Zhao, T. Sato & L. Wang - 2012.
Classification: Chordata, Reptilia, Rauisuchia, Paracrocodylomorpha Poposauroidea.
Species: D. fuyuanensis (type).
Size: Total length estimated about 1.5 meters long.
Known locations: China, Yunna Province - Falang Formation, Zhuganpo Member.
Time period: Ladinian of the Triassic.
Fossil representation: Almost complete skull and skeleton missing the tail.
is classed as a poposaurid rauisuchian,
though while most of the
members of this group such as Poposaurus,
are terrestrial, Diandongosuchus seems
to have been
semiaquatic and living in a similar manner to a crocodile. At the
time of writing the only other poposaurid thought to be similar to
Diandongosuchus is Qianosuchus
which was named
earlier. However it
should be pointed out that the Poposauridae is a group of rauisuchians
that is often used to house all of the odds and ends genera that don’t
quite fit in anywhere else.
A semi-aquatic lifestyle for Diandongosuchus has been established upon the basis that the holotype specimen was found in a marine rock deposit, and with the remains of fish within its stomach contents, clearly indicating that Diandongosuchus was a fish eater (piscivore). The position of the nostrils is also further back on the skull, while the premaxilla (the forward tooth bearing bone of the upper jaw) has a larger than usual number of teeth. These features are commonly seen upon other fish eating animals as they help facilitate prey capture.
- A new archosaur (Diapsida, Archosauriformes) from the marine Triassic of China. - Journal of Vertebrate Paleontology 32(5):1064-1081 - C. Li, X. -C. Wu, L. Zhao, T. Sato & L. Wang - 2012.